Need help on using tone2 pro on ubuntu 20

[hyphop]

@Yoark_YANG

But I couldn’t change my output device here, there is no option:

i think problem is PulseAudio check this post > Tone2 Pro / Tone1 + Linux + MPD == how can get max perfomance

1. check /etc/udev/rules.d/89-pulseaudio-usb.rules maybe your tone board skipped by this config → solution try remove this config and restart pulseaudio
2. try remove pulseaudio and try to use pure alsa