Proto-proto: Music Tones are a family of currencies. Enharmonics are either equivalent or cheap to convert. [How would they be acquired?]
Simple Tones can be combined into Complex Tones (e.g. chords, scales). Durations are a family of currencies. Durations (including rests) and Tones can be combined into Riffs. [What would they be spent on?] [Possibly replace colored VCs/Marks, allowing colors to be used for something different down the road. I could call it Agora Complex...]
