Heya, since Chromebooks run ChromeOS, you're going to be limited to running either whatever's browser-capable, or android apps if you're sticking to defaults.
There are still good options though in that space! (Albeit with some limitation such as no 3rd party plugin support). Here's some to consider which should run on ChromeOS by default:
- FL Studio Mobile
- Cubasis 3
- Caustic 3
- n-Track Studio
If you're turning Linux support on (via the Linux Desktop Enviroment setting), you'll be able to potentially get any of these working aswell: (results/support may vary)
- REAPER
- Ardour
- Tracktion Waveform Free 12