Function layers_json 

pub fn layers_json(
    stem: &Stem,
    descriptors: &Descriptors,
    synth: Synth,
    (source, source_sha256): (&str, &str),
    tempo: &Tempo,
    (transcription, notes): (Option<&TranscriptionRecord>, Option<&FinalNotes>),
    ((pitch, envelope, voices), mapped): ((&PitchLayer, &EnvelopeLayer, &VoicesLayer), &Mapped),
) -> Result<String, Error>

Renders the report of a stem as pretty-printed JSON with a final newline. The same stem always gives the same bytes.

source is the stem’s file name without its folder and the SHA-256 of the file’s bytes in lower-case hex, tempo the given and refined tempo, transcription the record of the transcriber that gave the notes, or None when none ran, and notes the final note list that notes.mid holds, or None without notes, and layers the pitch, envelope and voices layers with the mapper’s output for them, which each group splits by its name.

Errors

Returns a serde_json::Error only if a value cannot be written, which the finite unit types never cause.