Part of #2 Blocked by: #3, #15, #20
From an arrangement, or a patch document, a render is written as one fm.plyr.track in the signed-in account: title, description and artist as on atmosynth.at, the audio as FLAC, from Groove's own render with its span and tail chosen as an export's is. The record's shape is shared, not retyped (ADR 0020). Publishing again replaces it.