COM Objects > MIDI object > Methods > MIDI.StreamEventsEnum method

Remarks

Enumerates a specific type of MIDI event detected inside the loaded MIDI stream. After completing the enumeration, information about each of the detected MIDI events can be obtained through the MIDI.StreamEventsEnumItemGet method. Enumeration of events inside a specific portion of the loaded MIDI stream can be performed through the MIDI.StreamEventsEnumFromRange method.

The list of detected MIDI events stays available in memory until a new enumeration is performed through a call to this same method or through the MIDI.StreamEventsEnumFromRange method so a new enumeration always discards the previous list.

For further details about the use of MIDI protocol see the MIDI object section and the How to deal with MIDI protocol tutorial.

Syntax

[Visual Basic]

control.MIDI.StreamEventsEnum (

nPlayer as Integer,

nTrack as Integer,

nMidiEvent as enumMidiStreamEvents,

nCount as Long

) as enumErrorCodes

[C++]

short control.MIDI.StreamEventsEnum (

short nPlayer,

short nTrack,

short nMidiEvent,

long *nCount

);

Parameter

Description

nPlayer

Number representing the zero-based index of the involved player

nTrack

Number representing the zero-based index of the MIDI track to scan for events detection. The total number of available MIDI tracks can be obtained through the MIDI:TrackCountGet method.

nMidiEvent

The type of MIDI event.

Supported values are the following:

Mnemonic constant	Value	Meaning
MIDI_EVENT_ALL	0	All types of MIDI events.
MIDI_EVENT_NOTE	1	Presses or releases a key note.
MIDI_EVENT_PROGRAM	2	Modifies a preset or instrument.
MIDI_EVENT_CHANPRES	3	Modifies the channel pressure.
MIDI_EVENT_PITCH	4	Modifies the pitch wheel position.
MIDI_EVENT_PITCHRANGE	5	Modifies the pitch wheel range (MIDI RPN 0).
MIDI_EVENT_DRUMS	6	Switches between melody channels and the rhythm (drums) channel.
MIDI_EVENT_FINETUNE	7	Sets the fine tuning (MIDI RPN 1).
MIDI_EVENT_COARSETUNE	8	Sets the coarse tuning (MIDI RPN 2).
MIDI_EVENT_MASTERVOL	9	Sets the master volume.
MIDI_EVENT_BANK	10	Selects the bank to use (MIDI controller 0).
MIDI_EVENT_MODULATION	11	Sets the modulation (MIDI controller 1).
MIDI_EVENT_VOLUME	12	Sets the volume (MIDI controller 7).
MIDI_EVENT_PAN	13	Sets the pan position (MIDI controller 10).
MIDI_EVENT_EXPRESSION	14	Sets the expression level (MIDI controller 11).
MIDI_EVENT_SUSTAIN	15	Sets the sustain pedal or switch (MIDI controller 64).
MIDI_EVENT_SOUNDOFF	16	Stops all sounds (MIDI controller 120).
MIDI_EVENT_RESET	17	Reset controllers to their default values (MIDI controller 121).
MIDI_EVENT_NOTESOFF	18	Releases all key notes (MIDI controller 123).
MIDI_EVENT_PORTAMENTO	19	Sets the portamento switch (MIDI controller 65).
MIDI_EVENT_PORTATIME	20	Sets the portamento time (MIDI controller 5).
MIDI_EVENT_PORTANOTE	21	Sets the portamento start key (MIDI controller 84).
MIDI_EVENT_MODE	22	Switches between poly and mono modes (MIDI controllers 126 and 127).
MIDI_EVENT_REVERB	23	Sets the reverb level (MIDI controller 91).
MIDI_EVENT_CHORUS	24	Sets the chorus level (MIDI controller 93).
MIDI_EVENT_CUTOFF	25	Sets the cutoff of the low-pass filter (MIDI controller 74, NRPN 120h).
MIDI_EVENT_RESONANCE	26	Sets the resonance of the low-pass filter (MIDI controller 71, NRPN 121h).
MIDI_EVENT_RELEASE	27	Sets the release time (MIDI controller 72, NRPN 166h).
MIDI_EVENT_ATTACK	28	Sets the attack time (MIDI controller 73, NRPN 163h).
MIDI_EVENT_REVERB_TIME	32	Sets the reverb time.
MIDI_EVENT_REVERB_DELAY	33	Sets the reverb delay.
MIDI_EVENT_REVERB_LOCUTOFF	34	Sets the cutoff of the reverb low-pass filter.
MIDI_EVENT_REVERB_HIGCUTOFF	35	Sets the cutoff of the reverb high-pass filter.
MIDI_EVENT_REVERB_LEVEL	36	Sets the reverb level.
MIDI_EVENT_CHORUS_DELAY	37	Sets the chorus delay.
MIDI_EVENT_CHORUS_DEPTH	38	Sets the chorus depth.
MIDI_EVENT_CHORUS_RATE	39	Sets the chorus rate.
MIDI_EVENT_CHORUS_FEEDBACK	40	Sets the level of the chorus feedback..
MIDI_EVENT_CHORUS_LEVEL	41	Sets the chorus level.
MIDI_EVENT_CHORUS_REVERB	42	Sets the chorus reverb level.
MIDI_EVENT_DRUM_FINETUNE	50	Sets the fine tuning of a drum key (MIDI NRPN 19knh).
MIDI_EVENT_DRUM_COARSETUNE	51	Sets the coarse tuning of a drum key (MIDI NRPN 18knh).
MIDI_EVENT_DRUM_PAN	52	Sets the pan position of a drum key (MIDI NRPN 1Cknh).
MIDI_EVENT_DRUM_REVERB	53	Sets the reverb level of a drum key (MIDI NRPN 1Dknh).
MIDI_EVENT_DRUM_CHORUS	54	Sets the chorus level of a drum key (MIDI NRPN 1Eknh).
MIDI_EVENT_DRUM_CUTOFF	55	Sets the cutoff of the low-pass filter of a drum key (MIDI NRPN 14knh).
MIDI_EVENT_DRUM_RESONANCE	56	Sets the resonance of the low-pass filter of a drum key (MIDI NRPN 15knh).
MIDI_EVENT_DRUM_LEVEL	57	Sets the level of a drum key (MIDI NRPN 1Aknh).
MIDI_EVENT_SOFT	60	Sets the soft pedal or switch (MIDI controller 67).
MIDI_EVENT_SYSTEM	61	Sets the system mode, resetting everything to the system's defaults.
MIDI_EVENT_TEMPO	62	Sets the tempo (MIDI meta event 81).
MIDI_EVENT_SCALETUNING	63	Sets the tuning of a note in every octave.
MIDI_EVENT_CONTROL	64	Unhandled controller. This has no effect on the MIDI stream, but can be useful for custom processing purposes with the MidiStreamEventNotification event.
MIDI_EVENT_CHANPRES_VIBRATO	65	Sets the maximum effect of channel pressure on vibrato depth.
MIDI_EVENT_CHANPRES_PITCH	66	Sets the maximum effect of channel pressure on pitch.
MIDI_EVENT_CHANPRES_FILTER	67	Sets the maximum effect of channel pressure on filter cutoff.
MIDI_EVENT_CHANPRES_VOLUME	68	Sets the maximum effect of channel pressure on volume.
MIDI_EVENT_MODRANGE	69	Sets the modulation/vibrato depth range (MIDI RPN 5).
MIDI_EVENT_BANK_LSB	70	Selects the bank LSB to use (MIDI controller 32).
MIDI_EVENT_MIX_VOLUME_LEVEL	Hex 10000	Sets the volume level at mixing time, meaning that the level will not be affected by eventual MIDI_EVENT_VOLUME events inside a MIDI file.
MIDI_EVENT_TRANSPOSE	Hex 10001	Transposes all notes.
MIDI_EVENT_SYSTEMEX	Hex 10002	Sets the system mode, resetting everything to the system's defaults including MIDI channels allocated through the MIDI.ChannelsSet method.

nCount

Reference that, on return from the method call, will contain the number of events of the given type detected inside the loaded MIDI stream.

Return value

Value	Meaning

Negative value	An error occurred, check the LastError property value in order to get the error code
enumErrorCodes.ERR_NOERROR (0)	The method call was successful