Use as plain USB DAC with Audiophonics/Hifiberry DAC

[AndersHa]

Hi,

I just installed runeaudio 0.4 on my Raspberry Pi 3 with audiophonics v3 DAC. It works great. For audio testing purposes, I would like to use this setup as a plain USB DAC. Is this possible and how should I do the configurations?

Regards,
Anders

[silvrr]

Are you looking to use the USB output of the PI to feed a USB DAC? Just plug your DAC into the USB ports and change the output in the MPD tab.

If you are wanting to use the output from just he Pi, I wouldn't recommend it. The 3.5 mm jack is quite noisy and uses a PWM method of supplying the music which isn't very satisfying.

If I missed your question completely, please let me know.

[AndersHa]

Hi,
I would need to use the Raspberry Pi USB as a digital audio input. This would make it easy to test the audio performance of the attached DAC-board (Hifiberry/Audiophonics). I would prefer to use up to 24bit/192kHz audio test signals to really be able to measure D/A conversion performance of the DAC-board.

/Anders

[silvrr]

You can load your test files onto a USB storage device (flash drive, hard drive, ect.) and then play them through RuneAudio.

[AndersHa]

Yes absolutely your suggestion is possible, but a closed loop setup is what my test system would have preferred. I did some digging yesterday if it would be possible to setup a DLNA/uPNP server that on its input connect to a windows standard audio interface. This would be used to stream audio to the RP via the LAN interface. One unknown is however what audio formats the RP accept over uPNP. I would need 24bit and at least 96kHz sampling freq. Do you know how to find out this?

Jamcast is the audio streaming server that I'm looking into for the moment.

/Anders