HDMI or USb via OTG - Car Audio | DiyMobileAudio.com | Car Stereo Forum

Reply
 
LinkBack Thread Tools Display Modes
Old 08-18-2018   #1
 
mark3004's Avatar
 
Newbie
Join Date: Oct 2017
Location: Georgia
Posts: 119

Thanks: 6
Thanked 15 Times in 13 Posts
Rep Power: 23 mark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enough


iTrader: (0)



Default HDMI or USb via OTG

Hi guys,
I would like to put an Android system in the car, I am searching info on the web, assuming of course, that I am looking ONLY to get a digital signal to send into a DSP.
There are a lot of cheap HDMI to TOSLINK and USB to TOSLINK devices on the market, but something still is not clear, my questions are:

1) Does the tablets manipulate the audio signal before get out thru HDMi or USB? I mean they use internal (and poor quality) DAC, then convert in digital again or the signal go straight in digital?

2)Those cheap converter do make digital-to-digital conversion without loss quality or have internal (and poor quality) DAC then convert again in optical signal?

Sent from my LGMP450 using Tapatalk

Last edited by mark3004; 08-18-2018 at 05:28 PM..
mark3004 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 08-23-2018   #2
DIYMA 500 Club
 
minbari's Avatar
 
Enthusiast
Join Date: Mar 2011
Location: STL, MO
Age: 45
Posts: 11,884

Thanks: 35
Thanked 137 Times in 132 Posts
Rep Power: 231 minbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to allminbari is a name known to all


iTrader: (0)



Default Re: HDMI or USb via OTG

if you are looking for a hifi way to get music to a DSP, I would look elsewhere.

plenty of higher end MP3 players that have onboard optical connectors.

The fiio X5 III comes to mind.

Original post whore!
Bent Nail Brewery

2014 Tacoma, Stock HU |AC LC2i | Dayton 408 DSP | Phoenix Gold T500.2 -> Silver Flute 8" | -> JL 300/2 -> Vifa XT25 | JL 500/1 -> 12" ID IDQ
minbari is offline   Reply With Quote Quick reply to this message
Old 08-23-2018   #3
DIYMA 500 Club
 
Justin Zazzi's Avatar
 
Wave Shepherd
Join Date: May 2012
Location: Phoenix, Arizona
Posts: 2,317

Thanks: 24
Thanked 430 Times in 208 Posts
Rep Power: 275 Justin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond repute


iTrader: (6)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by mark3004 View Post
1) Does the tablets manipulate the audio signal before get out thru HDMi or USB? I mean they use internal (and poor quality) DAC, then convert in digital again or the signal go straight in digital?
no

Quote:
Originally Posted by mark3004 View Post
2)Those cheap converter do make digital-to-digital conversion without loss quality or have internal (and poor quality) DAC then convert again in optical signal?
no

Also, I'm convinced worrying about a DAC is a problem from yesteryear.

Measure with mics, mark with chalk, cut with torch, grind to fit, sand to finish, paint to match.
-My 2002 VW Golf stealth SQ build (an engineering student's perspective)
-Jazzi's tuning companion for Room EQ Wizard (help you tune a dsp)
Master's Degree in Acoustics at Penn State (10% complete)
Justin Zazzi is offline   Reply With Quote Quick reply to this message
 
Old 08-25-2018   #4
 
mark3004's Avatar
 
Newbie
Join Date: Oct 2017
Location: Georgia
Posts: 119

Thanks: 6
Thanked 15 Times in 13 Posts
Rep Power: 23 mark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enough


iTrader: (0)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by minbari View Post
if you are looking for a hifi way to get music to a DSP, I would look elsewhere.

plenty of higher end MP3 players that have onboard optical connectors.

The fiio X5 III comes to mind.
I don't think so.
If we can get digital source from a tablet, where is the difference compared with a player that cost almost the price of a DSP?
mark3004 is offline   Reply With Quote Quick reply to this message
Old 08-25-2018   #5
DIYMA 500 Club
 
Justin Zazzi's Avatar
 
Wave Shepherd
Join Date: May 2012
Location: Phoenix, Arizona
Posts: 2,317

Thanks: 24
Thanked 430 Times in 208 Posts
Rep Power: 275 Justin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond reputeJustin Zazzi has a reputation beyond repute


iTrader: (6)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by mark3004 View Post
I don't think so.
If we can get digital source from a tablet, where is the difference compared with a player that cost almost the price of a DSP?
marketing

Measure with mics, mark with chalk, cut with torch, grind to fit, sand to finish, paint to match.
-My 2002 VW Golf stealth SQ build (an engineering student's perspective)
-Jazzi's tuning companion for Room EQ Wizard (help you tune a dsp)
Master's Degree in Acoustics at Penn State (10% complete)
Justin Zazzi is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #6
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

anybody considered a bluetooth reciever and call it a wrap? I had my headunit stolen few months ago and didnt havr the cash to replace, so threw in my nextbook flexx 11.6 tablet. Made a slider mount. Sure, youll need the micro for power and whatnot on the tablet but thats it. At the amp, I just hardwired the reciever to the guts of a usb cirgarette outlet plug, and then to the remote turn-on for its 5v, and then the L and R outputs to the L and R inputs. Kept it all inside the amp and youd never know. The tablet connects automatically when you get in the car.
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #7
DIYMA 500 Club
 
Member
Join Date: Jul 2012
Location: Dallas
Posts: 376

Thanks: 6
Thanked 16 Times in 16 Posts
Rep Power: 89 CDT FAN will become famous soon enoughCDT FAN will become famous soon enoughCDT FAN will become famous soon enoughCDT FAN will become famous soon enoughCDT FAN will become famous soon enoughCDT FAN will become famous soon enough


iTrader: (5)



Default Re: HDMI or USb via OTG

I have used an OTG for my samsung tablet so that I could charge it at the same time I listened to it. I used Onkyo hiFi Player. It output USB audio to the iFi DAC. It has great sound quality and works without any hiccups.
CDT FAN is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #8
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

Quote:
Originally Posted by CDT FAN View Post
I have used an OTG for my samsung tablet so that I could charge it at the same time I listened to it. I used Onkyo hiFi Player. It output USB audio to the iFi DAC. It has great sound quality and works without any hiccups.
you lucked out my friend. OTG "host" mode is a newer advent. I went through 3 tablets in an effort to fibd one that would work for this application. Bought an SDR for am/fm. all that. but that firat onw was a,samsung 10.1, and it wouldnt charge and output music at the same time. wasnt even an option. so sold for a loss and bought rca with windows 10, butwindows doesnt (or didnt) even have a car app then. then there was a nextbook flexx11, an asus, and on and on. Its veen about 6 months....but for overall ease of install...and for the money, a simple bluetooth reciever dongle with a 3.5mm to rca cable and straight to the inputs on the amp. Or solder it up inside the amp itself. $10, and youll only have 1 connector to fool with for charging.
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #9
DIYMA 500 Club
 
Enthusiast
Join Date: May 2008
Location: VA
Posts: 2,159

Thanks: 441
Thanked 254 Times in 187 Posts
Rep Power: 157 naiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enough


iTrader: (9)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by CDT FAN View Post
I have used an OTG for my samsung tablet so that I could charge it at the same time I listened to it. I used Onkyo hiFi Player. It output USB audio to the iFi DAC. It has great sound quality and works without any hiccups.
Which Samsung tablet and OTG cable are you using? I have a Galaxy Tab A (the one with the S-Pen) that I had hoped to replace my 2012 Nexus 7 with. However, it won't charge at the same time as being a USB host (I have a USB hub, with a USB-DAC, Flash Drive, Steering wheel controls etc.). I even went so far as to remove the back of the tablet to see if I could bypass the battery, but the SM-P580 uses a ribbon cable instead of some regular wires so I could not tap into them with the power supply.

For me not being able to charge at the same time as host USB devices made it a non starter. Kind of a pain really as it would be a nice upgrade to the Nexus 7.

Some old luggage


naiku is online now   Reply With Quote Quick reply to this message
Old 11-02-2018   #10
 
mark3004's Avatar
 
Newbie
Join Date: Oct 2017
Location: Georgia
Posts: 119

Thanks: 6
Thanked 15 Times in 13 Posts
Rep Power: 23 mark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enoughmark3004 will become famous soon enough


iTrader: (0)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by naiku View Post
Which Samsung tablet and OTG cable are you using? I have a Galaxy Tab A (the one with the S-Pen) that I had hoped to replace my 2012 Nexus 7 with. However, it won't charge at the same time as being a USB host (I have a USB hub, with a USB-DAC, Flash Drive, Steering wheel controls etc.). I even went so far as to remove the back of the tablet to see if I could bypass the battery, but the SM-P580 uses a ribbon cable instead of some regular wires so I could not tap into them with the power supply.

For me not being able to charge at the same time as host USB devices made it a non starter. Kind of a pain really as it would be a nice upgrade to the Nexus 7.
I had same concern. The only one tablet that works both charge and OTG is nexus 7 so far.
Instead I have a samsung S2 8 working in APTX HD bluetooth protocol, and Oasis receiver do the same. Plus 256Gb microsd, so the USB works for charging purpose only!
mark3004 is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #11
DIYMA 500 Club
 
Enthusiast
Join Date: May 2008
Location: VA
Posts: 2,159

Thanks: 441
Thanked 254 Times in 187 Posts
Rep Power: 157 naiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enough


iTrader: (9)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by mark3004 View Post
I had same concern. The only one tablet that works both charge and OTG is nexus 7 so far.
Instead I have a samsung S2 8 working in APTX HD bluetooth protocol, and Oasis receiver do the same. Plus 256Gb microsd, so the USB works for charging purpose only!
I have debated picking up a 2013 Nexus 7 to replace my 2012 version, just because I know it will work. Really would like to find something newer though, but so far I am having no luck with anything.

Might grab my sons LG G-Pad 8.3 to try at some point, it has both a micro USB and a full size USB (I think it also has a Micro SD slot) so might work with charge and OTG. Biggest issue then is that I think the USB slots are on opposite ends which makes fitment a little tight, that is assuming it works.

Some old luggage


naiku is online now   Reply With Quote Quick reply to this message
Old 11-02-2018   #12
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

Quote:
Originally Posted by naiku View Post
Quote:
Originally Posted by CDT FAN View Post
I have used an OTG for my samsung tablet so that I could charge it at the same time I listened to it. I used Onkyo hiFi Player. It output USB audio to the iFi DAC. It has great sound quality and works without any hiccups.
Which Samsung tablet and OTG cable are you using? I have a Galaxy Tab A (the one with the S-Pen) that I had hoped to replace my 2012 Nexus 7 with. However, it won't charge at the same time as being a USB host (I have a USB hub, with a USB-DAC, Flash Drive, Steering wheel controls etc.). I even went so far as to remove the back of the tablet to see if I could bypass the battery, but the SM-P580 uses a ribbon cable instead of some regular wires so I could not tap into them with the power supply.

For me not being able to charge at the same time as host USB devices made it a non starter. Kind of a pain really as it would be a nice upgrade to the Nexus 7.
The Samsung, if i recall was indeed the Tab A. the 10.1 inch. A nice tablet to be sure. But the 30-pin port made it a pain. i had to order OTG cables..and in the end, you could only jam till its battery died. and again, the voyager 2.

Now, Ive got the Nextbook Flexx 11.6 with an android emulator to run android apps. as such, its stricktly car use due to the partitions. If someone has a better suggestion, Im all ears. Ears, and,not dollars given all the money I blew figuring it out myself.

The bluetooth dongles are a revelation. Right on the shelf at walmart. And with those, you dont have to worry about the battery as long as tour playlists are stored on the device. With a better tablet that charges and can hoat simultaniously, you can run a y cable to a USB hub. Into that, plug an SDR USB dongle, an aux extention run out to an in dash input jack, and all the flashdrives you want. I think,i had a card reader once. Had the hub in the glovebox and the antenna for the sdr on the back window. Its a work in progress, but the BT dongles are the sh**
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #13
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

Quote:
Originally Posted by Hohn.Ian View Post
Quote:
Originally Posted by naiku View Post
Quote:
Originally Posted by CDT FAN View Post
I have used an OTG for my samsung tablet so that I could charge it at the same time I listened to it. I used Onkyo hiFi Player. It output USB audio to the iFi DAC. It has great sound quality and works without any hiccups.
Which Samsung tablet and OTG cable are you using? I have a Galaxy Tab A (the one with the S-Pen) that I had hoped to replace my 2012 Nexus 7 with. However, it won't charge at the same time as being a USB host (I have a USB hub, with a USB-DAC, Flash Drive, Steering wheel controls etc.). I even went so far as to remove the back of the tablet to see if I could bypass the battery, but the SM-P580 uses a ribbon cable instead of some regular wires so I could not tap into them with the power supply.

For me not being able to charge at the same time as host USB devices made it a non starter. Kind of a pain really as it would be a nice upgrade to the Nexus 7.
The Samsung, if i recall was indeed the Tab A. the 10.1 inch. A nice tablet to be sure. But the 30-pin port made it a pain. i had to order OTG cables..and in the end, you could only jam till its battery died. and again, the voyager 2.

Now, Ive got the Nextbook Flexx 11.6 with an android emulator to run android apps. as such, its stricktly car use due to the partitions. If someone has a better suggestion, Im all ears. Ears, and,not dollars given all the money I blew figuring it out myself.

The bluetooth dongles are a revelation. Right on the shelf at walmart. And with those, you dont have to worry about the battery as long as tour playlists are stored on the device. With a better tablet that charges and can hoat simultaniously, you can run a y cable to a USB hub. Into that, plug an SDR USB dongle, an aux extention run out to an in dash input jack, and all the flashdrives you want. I think,i had a card reader once. Had the hub in the glovebox and the antenna for the sdr on the back window. Its a work in progress, but the BT dongles are the sh**
Dont forget the USB HUB option. Just get creative with the wiring and some cigarette lighter adapters for your 5v. you CAN whittle it down to using one port, then just have the slider dock. once aomeone starts wireless chargin, its ON. metal plate on the back of the tab, a formfitted endenture in the dash, and a couple neodinium magnet and youre in the game. the tab would just be a wireless remote
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-02-2018   #14
DIYMA 500 Club
 
Enthusiast
Join Date: May 2008
Location: VA
Posts: 2,159

Thanks: 441
Thanked 254 Times in 187 Posts
Rep Power: 157 naiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enough


iTrader: (9)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by Hohn.Ian View Post
The Samsung, if i recall was indeed the Tab A. the 10.1 inch. A nice tablet to be sure. But the 30-pin port made it a pain. i had to order OTG cables..and in the end, you could only jam till its battery died. and again, the voyager 2.
Ah yeah my Tab A is the newer one that just has a micro USB port, that's the problem with 99% of them though, OTG works fine but not OTG and charging. No idea what it is about the Nexus 7 that enables it, but I wish more tablets worked with it. Not being able to charge the battery while driving and using OTG is a deal breaker, especially if wanting to listen to music and run Waze for example.

Quote:
Originally Posted by Hohn.Ian View Post
Im all ears. Ears, and,not dollars given all the money I blew figuring it out myself.
Haha I hear you on this, I could have likely spent about half what I did getting my Nexus 7 up and running if I knew what to buy rather than trial and error.


Quote:
Originally Posted by Hohn.Ian View Post
Dont forget the USB HUB option. Just get creative with the wiring and some cigarette lighter adapters for your 5v. you CAN whittle it down to using one port, then just have the slider dock. once aomeone starts wireless chargin, its ON. metal plate on the back of the tab, a formfitted endenture in the dash, and a couple neodinium magnet and youre in the game. the tab would just be a wireless remote
I use a USB hub, it's a powered hub with 8 ports, did have a 4 port hub but wanted more. Typically I have a flash drive, Joycon (steering wheel controls), USB-DAC and an SDR radio dongle plugged in.

I use a DCDC-USB for power, at the time was the most reliable option around although there are cheaper options now. It typically increases my battery percentage by about 5% in 15 minutes of driving.

Now, where did my son put that G-pad....

Some old luggage


naiku is online now   Reply With Quote Quick reply to this message
Old 11-10-2018   #15
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

if youll give me a few to lay out some extra parts on the floor in a schematic, then throw some arrows and whatnot on the photo, I can give you what IVE found to be the most straightforward hardware solution. That is to say, for the tablets IVE had.

Keep in mind, that far as I know, Im the younveat person ever fired from NASA, and Im an artist now. So some might call my tech know-how sketchy these 15 years later. Ahhhh, but there was a time when they didnt make dual core processors but i had me one after a good bit of playin around with taxpayer money.

There are also bound to be more straightforward ways to accomplish some of the same tasks, but for the money... screw it. Clue: if you havent got host charging, you can always augment your tablets battery CAPACITY with a few extra batteries (i use a Schumacher Red Fuel jump pack lipo. added benefit of jumping your own car with a switch or running the tab without charge for a month) , a dremel, and some of my new fav product - copper tape
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-10-2018   #16
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

and btw....is the nexus 7 STILL considered rhe most install-friendly tablet as far as you know? googling it wont get you $***
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-15-2018   #17
DIYMA 500 Club
 
Enthusiast
Join Date: May 2008
Location: VA
Posts: 2,159

Thanks: 441
Thanked 254 Times in 187 Posts
Rep Power: 157 naiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enough


iTrader: (9)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by Hohn.Ian View Post
and btw....is the nexus 7 STILL considered rhe most install-friendly tablet as far as you know? googling it wont get you $***
In my research, yes, still by far the easiest to get installed. Crazy that no other tablet really comes close to it for simplicity of installation, it's partly why I am still running my 2012 Nexus.

Some old luggage


naiku is online now   Reply With Quote Quick reply to this message
Old 11-15-2018   #18
Upgrade Your Membership!
 
Newbie
Join Date: Aug 2014
Location: SW Suburbs of Chicago
Posts: 94

Thanks: 4
Thanked 5 Times in 5 Posts
Rep Power: 60 Souths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enough


iTrader: (5)



Default Re: HDMI or USb via OTG

I've tried with my Samsung S8 and then the S9 that replaced it and can't find a solution. I did find one OTG cable that charged and played music, but it introduced so much noise it was uselsss. I don't want to drop another $150 for the BT module for my Helix, I already spent that for the HEC-HD. Very disappointing Android.
Souths1der is offline   Reply With Quote Quick reply to this message
Old 11-15-2018   #19
DIYMA 500 Club
 
Enthusiast
Join Date: May 2008
Location: VA
Posts: 2,159

Thanks: 441
Thanked 254 Times in 187 Posts
Rep Power: 157 naiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enough


iTrader: (9)



Default Re: HDMI or USb via OTG

It's very frustrating, to me OTG + charging is something severely lacking. At this point I don't even know that I want to bother modifying my center console to try and fit another tablet and may just start looking into DD head units for when my Nexus 7 dies.

Was just looking again finding nothing, I did see that the Samsung Galaxy Tab A (SM-T380N) says it has up to 153 hours of music play time, obviously that is going to be in ideal conditions, screen off etc. While not ideal, especially in the case on a road trip for example where I might also want to be using GPS, it could work out that I could just bring it inside and charge it once a week or as needed.

But, I don't want to spend $200 on a tablet only to find that it does not even work with audio over OTG (as a previous Samsung tablet did that I tried) and then have to return it or try to sell it.

Some old luggage


naiku is online now   Reply With Quote Quick reply to this message
Old 11-16-2018   #20
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

Quote:
Originally Posted by Souths1der View Post
I've tried with my Samsung S8 and then the S9 that replaced it and can't find a solution. I did find one OTG cable that charged and played music, but it introduced so much noise it was uselsss. I don't want to drop another $150 for the BT module for my Helix, I already spent that for the HEC-HD. Very disappointing Android.
$150!? WHAT!? Okay, i know that Im no audiophile....but i cant tell the difference between the $9 BT module at Walmart and the Harman Kardon my buddy has. I used a friends Oscilliscope...and it couldnt either. Just slap a 3.5mm to RCA cable ($2.99) in the side and plug the RCAs into your amp input. For the 5v, run a line from a 12v ignition source(or anywhere for that matter, and rig it to the tip of your cheapest USB car charger. and a ground to the spring loaded clips on the chargers side. Boom. In the game.

As for an OTG cable boys....seriously? Lets step this game up, we dont need to BUY those anymore do we? whats the model number if your having trouble splicing one up. Ill have a crack.

Im selling my 11.6" Windiws 10 NOW, askibg $50 on letgo juat so i can get an android. Freaking rediculoua the stuff ive to through (though also learned) trying to do this. solved everything but the proper app
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-16-2018   #21
Upgrade Your Membership!
 
Newbie
Join Date: Aug 2014
Location: SW Suburbs of Chicago
Posts: 94

Thanks: 4
Thanked 5 Times in 5 Posts
Rep Power: 60 Souths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enoughSouths1der will become famous soon enough


iTrader: (5)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by Hohn.Ian View Post
$150!? WHAT!? Okay, i know that Im no audiophile....but i cant tell the difference between the $9 BT module at Walmart and the Harman Kardon my buddy has. I used a friends Oscilliscope...and it couldnt either. Just slap a 3.5mm to RCA cable ($2.99) in the side and plug the RCAs into your amp input. For the 5v, run a line from a 12v ignition source(or anywhere for that matter, and rig it to the tip of your cheapest USB car charger. and a ground to the spring loaded clips on the chargers side. Boom. In the game.

As for an OTG cable boys....seriously? Lets step this game up, we dont need to BUY those anymore do we? whats the model number if your having trouble splicing one up. Ill have a crack.

Im selling my 11.6" Windiws 10 NOW, askibg $50 on letgo juat so i can get an android. Freaking rediculoua the stuff ive to through (though also learned) trying to do this. solved everything but the proper app
LOL. I'm talking about the Helix Bluetooth card/module for the DSP, not some dongle.
Souths1der is offline   Reply With Quote Quick reply to this message
Old 11-16-2018   #22
 
Hohn.Ian's Avatar
 
Newbie
Join Date: Feb 2018
Location: mobile, al
Posts: 77

Thanks: 0
Thanked 1 Time in 1 Post
Rep Power: 18 Hohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enoughHohn.Ian will become famous soon enough


iTrader: (0)



Default

Quote:
Originally Posted by Souths1der View Post
Quote:
Originally Posted by Hohn.Ian View Post
$150!? WHAT!? Okay, i know that Im no audiophile....but i cant tell the difference between the $9 BT module at Walmart and the Harman Kardon my buddy has. I used a friends Oscilliscope...and it couldnt either. Just slap a 3.5mm to RCA cable ($2.99) in the side and plug the RCAs into your amp input. For the 5v, run a line from a 12v ignition source(or anywhere for that matter, and rig it to the tip of your cheapest USB car charger. and a ground to the spring loaded clips on the chargers side. Boom. In the game.

As for an OTG cable boys....seriously? Lets step this game up, we dont need to BUY those anymore do we? whats the model number if your having trouble splicing one up. Ill have a crack.

Im selling my 11.6" Windiws 10 NOW, askibg $50 on letgo juat so i can get an android. Freaking rediculoua the stuff ive to through (though also learned) trying to do this. solved everything but the proper app
LOL. I'm talking about the Helix Bluetooth card/module for the DSP, not some dongle.
whats the difference?


I mean. i hear ya on compression and stuff....?But as far as getting in your car, it pairs with your phone, speakers make noise BOOMBOOM- kinda difference. Or better yet, whats the $200 difference?
Hohn.Ian is offline   Reply With Quote Quick reply to this message
Old 11-21-2018   #23
 
Newbie
Join Date: Jul 2016
Location: Atlanta, GA
Posts: 18

Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0 TryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enough


iTrader: (0)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by mark3004 View Post
Hi guys,
1) Does the tablets manipulate the audio signal before get out thru HDMi or USB? I mean they use internal (and poor quality) DAC, then convert in digital again or the signal go straight in digital?

2)Those cheap converter do make digital-to-digital conversion without loss quality or have internal (and poor quality) DAC then convert again in optical signal?
Hi, I've done quite a bit of testing, experimenting, researching, and more for getting the ideal setup for my idea (bit-perfect passthrough to my Alpine PXA-H800, with 5.1 capability when needed).

Here are the answers to your questions:

1) The answer is, "It depends." If you're using an app like Viper for audio effects/enhancement, EQing, etc, or if the app has some type of audio custom modification, then the answer is yes.

Generally, speaking, the audio stream is not modified and can be bit-perfect if desired.

However, that doesn't apply to Bluetooth, as remember that Bluetooth uses a compression algorithm between the sender & receiver (even with APT-X, which I have, but does sound very nice) and reduces fidelity a bit.

If you're using an Android device and a USB-to-TOSLINK or coax adapter, later versions of Android unfortunately DO "upscale" the bitrate sent to the USB adapter, but no DAC is involved.

In that case, what actually happens depends on the particular device & Android build. Unfortunately Android builds aren't standardized much, if at all, when it comes to audio.

Using an HDMI audio extractor as I've done can give unmodified digital audio output, uncompressed if you want. In that case, you're looking for "passthrough" ability, and it's the same situation as home theater audio even if you are only using stereo and not 5.1 surround.

• For 5.1 sound also, you'll need an HDMI audio extractor that "handshakes" as a home theater receiver and lets the Android device see a surround-capable receiver. Monoprice has a great one I've tested and is below $50.

• I would avoid the cheaper HDMI audio extractors. They'll do the job, but a lot of times you don't know how they'll behave. Low-end devices have shitty specs or aren't clear at all about their important details.

Why does HDMI "handshaking" matter? (CEC device communication)

Media players you can use on Android (and other platforms) now won't allow optimal audio passthrough via HDMI unless they "see" a device that appears to be a surround decoder receiver, which is what I have tested successfully in MX Player, Kodi, and VLC Media Player.

Without it, most can only pass standard/lower-bit rate 2.0 stereo sound. Some media player apps won't support passthrough at all without it.

But if you only want stereo sound, you can get by with a standard HDMI audio extractor.

----------------------------------
if you are looking for a hifi way to get music to a DSP, I would look elsewhere. plenty of higher end MP3 players that have onboard optical connectors.

I don't agree. Few are an all-in-one solution as they can't play formats like an Android device can, including non-lossy audio formats.

.MP3 is a lossy format. Also, this avoids having to convert formats and then copy over to the device.

It's much less hassle to just be able to play the original file with in better quality, too.

-----------------------------------

So essentially, you can use a USB-to-optical adapter (I've tested the Nexus 7 with this) but it requires a tablet/phone with OTG support, and may not work right without removing/re-inserting it once power is removed.

The Nexus 7 has custom ROM support for these things and that's why it's a great choice for car audio.

You can alternatively use an Android device as I've done, like my older Sony phone w/ MHL (mini HDMI) or a tablet w/ HDMI, which is hard to find.

I've discovered the Nvidia Shield tablet works well for an Android media player with digital passthrough.

-------------------------------------

Currently I am using a very nice home Bose Bluetooth receiver wired with a 30-minute self-off circuit. I use the TOSLINK digital connection to my Alpine DSP.

Pure digital signal all the way to the back from my phone. Sounds great, until I get the tablet installed and have a perfect signal to the back.

FYI, It's also possible to use an external touchscreen in later Android versions (I tested this, too, but I'll be trying a bit more also).

I hope this helps.
TryDoingSomethingNew is offline   Reply With Quote Quick reply to this message
Old 11-21-2018   #24
 
Newbie
Join Date: Jul 2016
Location: Atlanta, GA
Posts: 18

Thanks: 2
Thanked 0 Times in 0 Posts
Rep Power: 0 TryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enoughTryDoingSomethingNew will become famous soon enough


iTrader: (0)



Default Re: HDMI or USb via OTG

> but i cant tell the difference between the $9 BT module at Walmart and the Harman Kardon my buddy has. I used a friends Oscilliscope...and it couldnt either.

The lower-end Bluetooth receivers have issues with using cheap chipsets. I've tested them vs far better options (Bose and Belkin high-fidelity receivers).

There was a huge difference in quality and I could definitely hear it. I've got a Bose model now with APT-X support, and it sounds great.

The Bluetooth decompression used in lower-end models isn't as good as the higher-end models. Cheaper units, like other electronic devices, tend to often use the same lower-end parts, whereas the more expensive ones use better Burr Brown or other ICs.

What I found with the lower-end Bluetooth receivers, also, were issues with playback, noise artifacts between tracks in Pandora and Spotify, and all kinds of odd problems you don't expect.

I haven't had a single problem like that with the Belkin or Bose units. Also they have better DACs inside if you're using the RCA outputs.
TryDoingSomethingNew is offline   Reply With Quote Quick reply to this message
Old 11-21-2018   #25
DIYMA 500 Club
 
Enthusiast
Join Date: May 2008
Location: VA
Posts: 2,159

Thanks: 441
Thanked 254 Times in 187 Posts
Rep Power: 157 naiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enoughnaiku will become famous soon enough


iTrader: (9)



Default Re: HDMI or USb via OTG

Quote:
Originally Posted by TryDoingSomethingNew View Post
I've discovered the Nvidia Shield tablet works well for an Android media player with digital passthrough.
How is the Nvidia Shield with OTG + charging though? Sure the mini HDMI can be used for the audio, but unless it can also support a USB flash drive, steering wheel controls etc it becomes difficult to use in a car. Although, I believe the Shield tablet has a MicroSD slot, so that rules out the flash drive, using HDMI would I believe negate the need for a USB-DAC, so then it's just the steering wheel controls (Joycon) that need to be plugged in via USB.

Looking further into it though, I wonder if it is possible to simply remove the battery from the Shield and hard wire it to a power supply in the car.

https://www.ifixit.com/Guide/Nvidia+...lacement/50117

https://forums.geforce.com/default/t...tery-in-2018-/

Not sure what the green and white wires are for, but I wonder if you could solder the red and black wires to a power supply in the car. It certainly removes the possibility of the battery overhearing while mounted in a car, constant power and leaves both the USB and HDMI plugs open.

Some old luggage


naiku is online now   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Bookmarks

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Car Audio | DiyMobileAudio.com | Car Stereo Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Location
Where you live
First name
Last name
Do you work in the 12 Volt industry?
Do you work in the 12 Volt industry?
Youtube Channel
Enter Your Youtube Username, And It will Be Linked To In Your Posts!
12V Industry - Company Name
Your company name.
12V Industry - Your Position
Your position in your company.

Log-in



Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.3

All times are GMT -6. The time now is 04:44 PM.


Powered by vBulletin®
Copyright ©2000 - 2019, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Powered by vBadvanced CMPS v3.2.3
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.

Ad Management by RedTyger

Home | User CP | Members List | New Posts | ITrader | Faq | Post Spy