🎹 MIDI Sequencer

Without further ado:

python from linuxpy.midi.device import Sequencer with Sequencer() as seq: port = seq.create_port() port.connect_from(14, 0) for event in seq: print(event) 14:0 Note on channel=0, note=100, velocity=3, off_velocity=0, duration=0 14:0 Clock queue=0, pad=b'' 14:0 System exclusive F0 61 62 63 F7 14:0 Note off channel=0, note=55, velocity=3, off_velocity=0, duration=0

System information

$ python
>>> from linuxpy.midi.device import Sequencer
>>> seq = Sequencer("a midi client")
>>> seq.open()

>>> seq.version
1.0.2

>>> seq.client_info
snd_seq_client_info(client=128, type=1, name=b'a midi client', filter=0, multicast_filter=b'', event_filter=b'', num_ports=0, event_lost=0, card=-1, pid=1288570)

>>> seq.running_mode
snd_seq_running_info(client=0, big_endian=0, cpu_mode=0, pad=0)

>>> seq.system_info
snd_seq_system_info(queues=32, clients=192, ports=254, channels=256, cur_clients=3, cur_queues=0)

asyncio

asyncio is a first class citizen to linuxpy.midi:

$ python -m asyncio

>>> from linuxpy.midi.device import Sequencer
>>> with Sequencer() as seq:
...     port = seq.create_port()
...     port.connect_from(14, 0)
...     async for event in seq:
...         print(event)
 14:0   Note on              channel=0, note=100, velocity=3, off_velocity=0, duration=0
 14:0   Clock                queue=0, pad=b''
 14:0   System exclusive     F0 61 62 63 F7
 14:0   Note off             channel=0, note=55, velocity=3, off_velocity=0, duration=0

CLI

A basic CLI is provided that allows listing MIDI clients & ports and dumping MIDI sequencer events:

List all ports:

python -m linuxpy.midi.cli ls Port Client Port Type Capabilities 0:0 System Timer 0 SR, W, R 0:1 System Announce 0 SR, R 14:0 Midi Through Midi Through Port-0 PORT, SOFTWARE, MIDI_GENERIC SW, SR, W, R

Listen to events on selected port(s):

python -m linuxpy.midi.cli listen 0:1 14:0 0:1 Port subscribed sender=(client=0, port=1), dest=(client=128, port=0) 0:1 Port start client=128, port=1 0:1 Port subscribed sender=(client=14, port=0), dest=(client=128, port=1) 0:1 Client start client=130, port=0 0:1 Port start client=130, port=0 0:1 Port subscribed sender=(client=130, port=0), dest=(client=14, port=0) 14:0 Note on channel=0, note=100, velocity=3, off_velocity=0, duration=0 0:1 Port unsubscribed sender=(client=130, port=0), dest=(client=14, port=0) 0:1 Port exit client=130, port=0 0:1 Client exit client=130, port=0 0:1 Port exit client=129, port=0 0:1 Client exit client=129, port=0 0:1 Client start client=129, port=0 0:1 Port start client=129, port=0 14:0 Note on channel=0, note=100, velocity=3, off_velocity=0, duration=0 14:0 Note on channel=0, note=0, velocity=255, off_velocity=0, duration=0 14:0 Note on channel=0, note=0, velocity=255, off_velocity=0, duration=0