Idea: Independent Time Line

Danoise is exploring this with his Recorder idea. Recorder already exists and is included with the latest Duplex beta.

PDF Documentation On Recorder: https://docs.google.com/document/d/1TV_SMar2prtZjaq-AeR2J-HBjTUzhEH3XrQrTUJR30o/edit?hl=en&authkey=COb1wQw#

Recorder is inspired by my GridTard idea, currently vapourware. Both are similar to what you are describing and doable with the API.