Current best 2ch USB->I2S DIY solution?

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MWP

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Joined 2002
#1
Hi guys,

It seems the USB headphone DAC i made 11yrs ago has finally died, so im looking to make a new improved version.

My old unit used the PCM2707 for USB to I2S which is limited to 48khz 16bit.
Now that i have some 96khz 24bit recordings, it would be great to have an interface that supports that or better.

So... what would you guys suggest that has:
- 1 x I2S output.
- Supports 96khz 24bit or better.
- Very compact PCB.
- Doesn't require extra drivers for windows/linux use.
- Is currently available

Thanks in advance 🙂
 
#3
anything above 96khz / 24bits require an usb audio class 2.0 compliant chip.
Windows doesn't have a built-in UAC 2.0 (well, it does have an incomplete preview drivers for "Windows Insiders" - beta testers).
So, it's not possible to have a driverless usb to i2s interface for 192khz or more.

No problem for linux UAC 2.0 built-in drivers. it supports natively Amanero, Xmos or CMedia chips

ps: I use an amanero too - if you don't need galvanic isolation, it's quite recommanded.
If you want isolation and external power supply and insanely high 768khz support, you can look for Diyinhk Xmos Xcore interface ( Isolated XMOS 768kHz DXD DSD512(DSD1024) high-quality USB to I2S/DSD PCB - DIYINHK )
 
#4
Thanks for those answers chaps, very much appreciated.

So is there any reason why i shouldn't buy the XMos based unit, over the Amanero?
The Xmos supports higher rates, has the isolation and is only $10 more.
 
#5
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