I am not really qualified to access it's quality, but there is also lmms, which looks like it works well enough. https://lmms.io/ https://lmms.io/ Not really

I am not really qualified to access it's quality, but there is also lmms, which looks like it works well enough. https://lmms.io/ https://lmms.io/ Not really qualified because I am not a musician and I was only using lmms to play around with a midi dials and buttons box, openbsd's sndio. and to see if I could get them to work togther. So in my case it was more of a systems integration exercise than making any music with it.