This part of the website contains proposals to modify and extend the abc standard, version 2.1 document.

If adopted they will be included in abc standard, version 2.2 or a subsequent version.

• Transposition - now incorporated in abc 2.2
• Clefs, Voice Parameters - mostly superseded by subsequent transposition proposals
• Scopes of Items in Multi-Voice Tunes - postponed to abc 2.3 - see the route-map
• Overlays - postponed to abc 2.3 - see the route-map
• Timbres & MIDI

For details about how to submit a proposal, see the updating page.