An internal package
themesounds
code.streamgremlin.com/streamgremlin/internal/overlays/themesounds
Package themesounds makes the built-in wheel looks' sounds (docs/adr/0036-packages-plugins-and-themes.md, D-065).
It’s one of StreamGremlin’s own parts: Go lets only StreamGremlin’s code import packages under internal/.
Part of StreamGremlin’s code, free and open source under the Apache License 2.0.