Is it possible to use the USB port for both the MIDI output and the synthesized audio output?

Using Zynthian
1

New to Zythian, we have a v4 kit that we assembled ourselves with a RPi4. We also have a Roland DP501R - https://www.roland.com/global/support/by_product/rp501r/owners_manuals/ that we’re using as a MIDI input to Zythian box. We can get audio out of the Zythian box back into the piano through the 3.5mm headphone jack back feeding this into the Roland piano’s 3.5mm mic input jack.

We’re wondering if there’s a way to set this up so everything is carried over just the USB connection instead? We have a USB port on the piano which we’re connecting to one of the RPi4’s USB3.0 ports for MIDI.

2

I doesn’t look like the RP501R supports audio over USB. The manual is quite brief in its description of its computer USB interface but it looks like it only supports USB MIDI. If the device did support Class Compliant USB Audio then it could be configured as the audio interface instead of the internal soundcard.