static void sysex(snd_midi_op_t *ops, void *private, unsigned char *sysex, int len, snd_midi_channel_set_t *chset);
static void all_sounds_off(snd_midi_op_t *ops, void *private, snd_midi_channel_t *chan);
static void all_notes_off(snd_midi_op_t *ops, void *private, snd_midi_channel_t *chan);
static void sysex(snd_midi_op_t *ops, void *private, unsigned char *sysex, int len, snd_midi_channel_set_t *chset);
static void all_sounds_off(snd_midi_op_t *ops, void *private, snd_midi_channel_t *chan);
static void all_notes_off(snd_midi_op_t *ops, void *private, snd_midi_channel_t *chan);