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SEQUENCER(4) Device Drivers Manual SEQUENCER(4)

sequencerOSS-compatible MIDI sequencer device

pseudo-device sequencer [count]

#include <sys/types.h>
#include <sys/midiio.h>

The sequencer device provides an event-oriented interface simultaneously to all MIDI ports. Events sent to or received from this device not only contain the actual MIDI events, but also timing information. The kernel will make sure that data is sent to the physical device at the indicated time. The sequencer device uses the midi(4) devices internally and they are unavailable when used by the sequencer device.

The API for the sequencer device is binary compatible with the OSS sequencer interface.

new sequencer device using 8-byte events
old sequencer device using 4-byte events

midiplay(1), ioctl(2), ossaudio(3), midi(4)

The sequencer driver first appeared in OpenBSD 2.5.

The sequencer driver was written by Lennart Augustsson.

June 26, 2008 OpenBSD-5.1