If you've flashed firmware that doesn't seem to include the Music Player (but see it as an option), try creating a "music_player" folder on the SD Card (ext) and pop some tunes in! You can use RTTTL (in TXT format) or FMF (Flipper Music Format) files.
NOTE: Make sure to put the TXT and FMF files in the root of the music_player folder for them to work!
If using subfolders, renaming TXT to RTTTL seems to work for some, though it stopped working for me. Sadly, that means no organization of music files as they all need to be in the root of the music_player folder. The various firmware devs are working on a fix. Otherwise, you can access them through the file browser on later firmwares.
TON MORE FILES from neverfa11ing here (unverified but likely better than nothing!)
Or how about some FMF files? Good collection (and growing) from 0XIII0 over here.
Also over 800 more from Merwin's Ringtone Search (MIDI and RTTTL).
Lastly, want to test the music online (or write your own?) Check out Adam's online RTTTL Player.
I've had so many asking for me to add this.
BTC: 3AWgaL3FxquakP15ZVDxr8q8xVTc5Q75dS
BCH: 17nWCvf2YPMZ3F3H1seX8T149Z9E3BMKXk
ETH: 0x0f0003fCB0bD9355Ad7B124c30b9F3D860D5E191
LTC: M8Ujk52U27bkm1ksiWUyteL8b3rRQVMke2
So, here it is. All donations of any size are humbly appreciated.
Donations will be used for hardware (and maybe caffeine) to further testing!