No time to delve into the big and serious music apps?
PixiTracker is what you need! It is a simple and fun tool to quickly create musical sketches, chiptunes and sound experiments.
Without requiring a lot of musical knowledge!
And it is free for most of the systems, except the Android and iOS.
pattern-based sequencer (tracker) with high quality sampler;
several packs with unique sounds;
sound recorder (from microphone or line-in);
MIDI keyboard support;
export to XM (eXtended Module of the FastTracker2) - this file can be loaded by any modern music tracker/player (for example, SunVox);
Linux (x86, x86_64, ARM (Raspberry Pi, PocketCHIP, etc.), ARM64 (PINE64, etc.));