Speaking of real-time, the reason Sonic Pi is considered a “live coding” synthesizer is that you can make changes to a song while it’s playing to introduce an element of live performance.

Sonic Pi is a musical coding system in Raspberry Pi. This presentation shows how to develop simple repetitive songs using sonic pi coding scheme.

But what about something totally new? I was thinking of this while looking at Sonic Pi, a musical instrument you play by coding. But back to the keyboard, the word processor, and the MP3 player.

Sonic Pi, however, is so expressive that many live coders actually pro­ject the code on a big screen during sets so everyone can see how the music is being generated.