Sound file of the natural A minor scale Digital recording, made with an acoustic piano and Audacity software by Opus33. This music is in the public domain. The recording is not copyrighted, and it is hereby released by Opus33 into the public domain. The following tag, though it is not quite accurate, is included in order to authorize this file according to the Wikipedia rules:
Double harmonic scale with quarter tones. Created by Hyacinth (talk) 07:11, 10 March 2010 using Sibelius 5. MIDI pitch bend appears to match intervals.
24-tet scale on C (50 cent steps). Easley Blackwood, Jr.'s notation for 24 equal temperament. As only "ups" are used, there are no three-quarter flats and quarter flats are enharmonically spelled (Dd = C#↑). Pitches are split into two groups of 12. MIDI pitch bend is correct for intervals.