The last objective is the complicated one. I have chosen a few third-party beat/music creating platforms. Some of them are too heavy and might create some instability. I really like lmms.io. They have great community support and there have been some lighter version released. The program already requires 2gb of ram which is asking a lot given the wallet takes up a lot of memory as well.

Future warning:
Since there has not been any communication from the dev, I may need to create a new announcement.