WAV keeps the sound. MIDI gives you three editable tracks. Drag either into Logic; open MIDI as a project to keep tempo changes. Download before leaving this page.
How to play · keyboard controls
Move a point up for a higher note, out for more pulses, and sideways to place it in stereo. Open the triangle for a brighter sound. Space starts or stops the cycle. Q, W and E choose a point; arrow keys move it. Shift + arrow makes a smaller move.