returnValue(Patch(addQuads=quads))

@inlineCallbacks

def songNotePatch(graph, dropped, song, event, ctx):

    """

    drop into effectsequencer timeline

    ported from timeline.coffee makeNewNote

    """

    with graph.currentState(

            tripleFilter=(dropped, None, None)) as g:

        droppedTypes = list(g.objects(dropped, RDF.type))

    quads = []

    fade = 2 if event == 'default' else 0

    if L9['Effect'] in droppedTypes:

        musicStatus = yield getMusicStatus()

        songTime = musicStatus['t']

        note = graph.sequentialUri(song + '/n')

        curve = graph.sequentialUri(note + 'c')

        quads.extend([

            (song, L9['note'], note, ctx),

            (note, RDF.type, L9['Note'], ctx),

            (note, L9['curve'], curve, ctx),

            (note, L9['effectClass'], dropped, ctx),

            (note, L9['originTime'], Literal(songTime), ctx),

            (curve, RDF.type, L9['Curve'], ctx),