def tuples_to_packets(note_on_tuples, pps):
packets = []
i = 0
seq = 0
period = (1.0/pps)*(32000)
packets.append(ds.create_packet(0, 0, int(period) >> 5, 0))
while (i < len(note_on_tuples)):
filtered = [x for x in note_on_tuples if x[2] == note_on_tuples[i][2]]
drums = 0
for x in range(note_on_tuples[i][3]):
packets.append(ds.create_packet(seq % 4, 0, 0, drums))
seq += 1
for x in filtered:
try:
drum_index = supported_drums.index(x[0])
drums |= 0x1 << drum_index
except ValueError:
print str(x[0]) + ' is not in the list of supported MIDI drums.'
packets.append(ds.create_packet(seq % 4, 0, 0, drums))
seq += 1
i += len(filtered)
return packets