Songs that sound like this song

Similarity is derived from analysing the audio, which Ampache does not do itself, so this needs a sonic-analysis plugin (see the AudioMuse plugin). With none enabled the request is refused with 403 rather than answered with an empty list. similarity runs 0.0-1.0 where 1.0 is the same recording, matching the OpenSubsonic sonicMatch scale, and is -1 when the backend gives no comparable score.