Depends on what audio programming do you want to do really. If you are interested in the audio side, I would recommend https://puredata.info/ https://puredata.i

Depends on what audio programming do you want to do really. If you are interested in the audio side, I would recommend https://puredata.info/ https://puredata.info/ (it has tutorial on synthesis and everything). If you want to explorer the programming side, I would just go picking apart small synths: https://github.com/grumdrig/jsfxr https://github.com/grumdrig/jsfxr http://www.pouet.net/prod.php?which=20656 http://www.pouet.net/prod.php?which=20656 (click on source, there's a mini synth there in that demo).