Audio format

What type of audio format should I use Sup Forums?

arranged midis

.tak

.jpg

.wmv

Any non-proprietary file formats. Mp3, aac or ogg vorbis

FLAC if you have space for Lossless
Max Bitrate MP3/M4A if not
Really depends what you wanna play it with though (ie: ALAC if iPods and such)

isn't mp3 proprietary?

Patents expired.

For archiving: FLAC
For home/portable listening: Opus 128 VBR
For legacy devices: MP3 v0