export TERM=rxvt-256color; vis; echo "$?" -> 1 ; no output / Rhino (rolling Ubuntu devel) / guake

[iconoclasthero]

Out of the box it just ran. Not sure if it was pulling from alsa or pulse (remote mpd via module-native-protocol-tcp), but the spectrum came up.

As I was playing with the config I tried to follow the color suggestion at the very top of the README.md...

$ export TERM=rxvt-256color; vis; echo "$?"; uname -a
1
Linux inspiron 6.9.1-060901-generic #202405171038 SMP PREEMPT_DYNAMIC Fri May 17 10:55:28 UTC 2024 x86_64 x86_64 x86_x

I don't know what this means for your README.md but FYI.

$ export TERM=xterm-256color; vis

worked just fine.

nb: nano also failed to start with the TERM=rxvt-256color