| hmi | HMI Audio |
| hps | Gamecube HPS Audio Data |
| hrt | Hornet Packer Music Module |
| hsb | HALion Sound Bank |
| hsc | HSC-Tracker Song |
| hsq | Herbulot AdLib System Audio |
| hvl | Commodore Amiga HivelyTracker Audio Module |
| iaa | INTUS Terminal Audio Archive |
| ibk | Creative Labs FM Banks |
| idd | MIDI Instrument Definition File |
| idf | MIDI Instrument Definition File |
| idsp | Nintendo Gamecube Streamed Audio |
| ikx | iKlax Creator Audio |
| ilb | Scream Tracker 2 Instrument Library |
| ilbc | Internet Low Bit Rate Codec Audio |
| ima4 | IMA 4-bit ADPCM Compressed Audio |
| ime | iMelody Ringtone |
| imelody | iMelody Ringtone |
| imf | id Software Music Format Data |
| ims | IMPlay Song |
| imy | iMelody Ringtone |
| ins | Adlib Tracker II Instrument Data |
| ins | Cakewalk Sonar Instrument Definition |
| ins | EPSDisk Instrument File |
| ins | HSC-Tracker Instrument |
| ins | Sample Cell II Instrument Definition |
| instr | Magix Music Studio VST Instruments Data |
| ircam | IRCAM SoundFile |
| isma | IIS Smooth Streaming Audio |
| ist | Digitrakker Instrument Data |
