Scribbletune can be used to create full length tracks in the browser or from the terminal by exporting MIDI files!
Here are some full length tracks created with Scribbletune in Live events with their videos (listed in descending order in terms of sound quality):
2017 Jan 5 | Github HQ, San Francisco
2018 Apr 26 | Smarkets HQ, Los Angeles
2017 July 27 | ForwardJS, San Francisco
2018 Sep 26 | Trading Technologies HQ, Chicago
2016 Sep 23 | PayPal HQ, San Jose
Watch a video of how this was made