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Discussion Starter #1 (Edited)
Howdy,

For any familiar with the Alpine CDA-117, what's the highest SQ format one can use with the USB?

I've looked a bit and haven't found much. From experimenting, I know it' will not play WAV or WMA lossless. I have noted it plays .mp3 (lame) 320 kbps.

Any opinions or am I back to CDs for lossless? Of note, I have DB PowerAmp for conversions as necessary.

Thanks!
 

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think you will find that most HUs have 320kbps as the highest rate they will support. (I am sure there are exceptions) for me personally, while driving in a noisey car. 320 VBR sounds just as good as cd.
 

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Chances are you won't notice a difference because of the delivery method.. It's all down to the recording when you're talking about CD/USB interface.
 

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Discussion Starter #6 (Edited)
Just talked to Alpine tech suppport and they confirmed that 320 kbps MP3 and 96 kbps WMA is the highest the CDA-117 will play via the USB.

Which is better seems a topic of much online debate. I'm going with the WMA 96 kbps for now.

The tech did say that I could get higher quality using an IPOD. Since I'm already converting the music (I rip my home collection to WMA lossless via DB PowerAmp.) to WMA 96 kbps, perhaps I just need to break down and buy an IPOD to replace my ancient 2.5 GB USB drive... :)
 

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just apple lossless direct from the ipod.
It won't play that.

If you are gonna convert anyway, why not convert to 320vbr?

Sent from my Motorola Electrify using Tapatalk
 

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320kbit CBR/VBR lame codecs are good enough to be indistinguishable from wav/lossless in a car. I hear differences below 192kbit CBR if I listen to good recorded tracks.

Here's a site where they measured a audio clip and compared them against eachother

Lossy vs lossless

Edit: Check out 128kbit, almost no information above 15kHz
 

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I play songs (recorded from I-Tunes) in lossless through my I-Phone 3Gs via the USB, as well as by streaming, with no problem.
I think that by using the USB, the DAC's from the I-Phone are bypassed and I can't tell a difference between a CD, lossless through USB or streaming.
I did listen to music way too loud in my youth so take that with a grain of salt.
Gary
 

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Discussion Starter #11
Thanks for all the good advice. I think I'll move over, for mobile applications at least (car, mp3/wma player [non-IPODs that I already own], to 320CBR MP3. I did some ABX testing with Foobar and it's really tough to tell any differences. The folks over at Hydrogenaudio Forums - Portal have given me some more things to check out...

320kbit CBR/VBR lame codecs are good enough to be indistinguishable from wav/lossless in a car. I hear differences below 192kbit CBR if I listen to good recorded tracks.

Here's a site where they measured a audio clip and compared them against eachother

Lossy vs lossless

Edit: Check out 128kbit, almost no information above 15kHz
 
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