SVQ is an extension specific to files generated by music sequencers found in Roland instruments. These are mainly the Roland MC-80 (hardware sequencer) and the Roland XP-50 (music workstation). SVQ files are audio files, but their structure conforms to the MIDI format. This allows easy exchange of audio data between MIDI-compatible devices.

An SVQ file does not contain typical audio data, only an instrument data set of how you want the song to play. These are note and note values, tempo, definition of instruments, etc.