i wish there was an emacs for music which just brings a fast lv2/clap pipewire audio processing stack and sequencing/editing/mixing UIs (pluggable) would be brought in by a community of contributors. also it should be able to run with minimal featureset on resource constrained devices but take advantage of multicore when available.
@mntmnhttps://zynthian.org have an lv2 plugin host, mixer, looper and sequencer for their raspberry pi synth platform kit thing. It's more designed for encoders and touch screen and written in python but it might be a start. Unless your looking for an actual emacs plugin?!