Finally, after finishing the MIDI Editor & Sequencer, I have made a very important feature; Instruments! Here is some test footage:

https://www.youtube.com/watch?v=u1zWc_jJBcc

As you can see, the fully custom envelopes will allow for a lot of customization although I will probably add some presets. Also, I will add more things to the left menu panel(like filters, panning, arpegiation maybe?). The instrument system is currently not connected to the midi system, so I will need to work on that. Any suggestions, feedback, ideas(especially for a name) are highly appriciated.

Once again, I will finish and release this app before the jam, so that I and others can use it :D