Here is an example of a Max/MSP patch that uses l-systems: https://www.youtube.com/watch?v=Z3hoAuS3qzg

If you are curious about algorithmic compositions you may want to check the British duo Autechre. Their 2013 EP, L-Event, is probably a reference between l-systems and eleventh (interval): https://www.youtube.com/watch?v=sKtrcF_Y16Y