How to choose ALSA sound device on Raspberry Pi + Ubuntu?

[surajang]

Hello, FAUSTers!

So I made a simple sound generating thing with FAUST and built a Linux CLI app using faust2alsaconsole script.
I ran it on Raspberry Pi 4 with Ubuntu 20.04 installed and it worked....kinda :/
The thing is, Raspberry Pi has two audio output options: one is HDMI audio(device 0) and the other is analog 3.5mm headphone jack(device 1).
I wanted to my app output to headphone jack, however I have no idea how to do it.
One thing I tried is to set default sound output to headphone jack by editing .asoundrc file. It seemed like work however, my FAUST CLI app still output to HDMI audio. Seems like the app always choose the device 0 for its output destination.
Any idea?

Thx

[sletz]

You may have to improve the (now quite old) ALSA architecture file here: https://github.com/grame-cncm/faust/blob/master-dev/architecture/faust/audio/alsa-dsp.h

[surajang]

Thanks for the nice starting point :)
Found this line and I could pass -d parameter with "hw:1" and it works!!