midi_synth v0.4.1

MIDISynth.Command (midi_synth v0.4.1) View Source

Convert MIDI commands to raw bytes

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Types

channel()

A MIDI channel number

duration()

The duration in milliseconds for which to hold down a note.

int7()

A 7-bit integer

note()

A MIDI note

program()

A MIDI program

velocity()

The velocity to strike the note.

volume()

A channel volume

Functions

change_control(channel, control_number, control_value \\ 0)

Change the MIDI controller value of a channel.

change_program(channel, prog)

Change the current program (e.g. instrument) of a channel.

change_sound_bank(channel, bank)

Change the sound bank of a channel.

change_volume(channel, volume)

Change the volume of a MIDI channel. This change is applied to all playing and future notes.

note_off(channel, note)

Turn a note in a channel off.

note_off_all(channel)

Turn all active notes in a channel off.

note_on(channel, note, velocity)

Turn a note in a channel on.

pan(channel, pan)

Change the panoramic (pan) of a channel. This shifts the sound from the left or right ear in when playing stereo. Values below 64 moves the sound to the left, and above to the right.

pitch_bend(channel, bend)

Bend the pitch of notes playing in a channel. Values below 0x2000 will decrease the pitch, and higher values will increase it.

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channel()

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Specs

channel() :: 0..15

A MIDI channel number

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duration()

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Specs

duration() :: non_neg_integer()

The duration in milliseconds for which to hold down a note.

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int7()

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Specs

int7() :: 0..127

A 7-bit integer

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note()

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Specs

note() :: int7()

A MIDI note

For non-percussion instruments, the frequency of a note is 440 * 2^((n − 69) / 12) where n is the note number.

Middle C is 60

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program()

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Specs

program() :: int7()

A MIDI program

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velocity()

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Specs

velocity() :: int7()

The velocity to strike the note.

127 = maximum velocity

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volume()

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Specs

volume() :: int7()

A channel volume

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change_control(channel, control_number, control_value \\ 0)

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Specs

change_control(channel(), int7(), int7()) :: <<_::24>>

Change the MIDI controller value of a channel.

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change_program(channel, prog)

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Specs

change_program(channel(), program()) :: <<_::16>>

Change the current program (e.g. instrument) of a channel.

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change_sound_bank(channel, bank)

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Specs

change_sound_bank(channel(), integer()) :: <<_::48>>

Change the sound bank of a channel.

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change_volume(channel, volume)

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Specs

change_volume(channel(), int7()) :: <<_::24>>

Change the volume of a MIDI channel. This change is applied to all playing and future notes.

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note_off(channel, note)

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Specs

note_off(channel(), note()) :: <<_::24>>

Turn a note in a channel off.

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note_off_all(channel)

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Specs

note_off_all(channel()) :: <<_::24>>

Turn all active notes in a channel off.

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note_on(channel, note, velocity)

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Specs

note_on(channel(), note(), velocity()) :: <<_::24>>

Turn a note in a channel on.

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pan(channel, pan)

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Specs

pan(channel(), int7()) :: <<_::24>>

Change the panoramic (pan) of a channel. This shifts the sound from the left or right ear in when playing stereo. Values below 64 moves the sound to the left, and above to the right.

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pitch_bend(channel, bend)

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Specs

pitch_bend(channel(), integer()) :: <<_::24>>

Bend the pitch of notes playing in a channel. Values below 0x2000 will decrease the pitch, and higher values will increase it.