OptionalalignmentOptionalaudioPresent when audio was captured; samples are stored separately as WAV
ISO timestamp
Length of the take — the later of the last MIDI event and the audio end
TAKE_FORMAT_VERSION at the time of writing
OptionalgradeThe take's final grade, when the app that stored it had graded it
OptionalnotesFree-text notes from the performer, e.g. which mistakes were intentional
Capture profile the microphone was opened with
Optionalscore
Everything recorded about one take, in a JSON-serialisable form.