WeCompose is a very fun music making app under development! :)
How to use an emulator from commandline: https://stuff.mit.edu/afs/sipb/project/android/docs/tools/help/emulator.html
Guide for installation/running of MongoDB Community Edition: https://docs.mongodb.com/manual/installation/
The python script 'setup.py' populates the database 'test' with some dummy documents in some collections
'PyMongo' has to be installed: https://docs.mongodb.com/getting-started/python/client/