When the MPE Zone is Upper Zone is, Channel 16 is used for global messages. The global channel is set by the "MPE Zone." When the MPE Zone is the Lower Zone, Channel 1 is used for global messages. One channel (usually Channel 1) is used for global messages – data such as preset changes and pedal positions are transmitted on this channel to apply to all notes equally. When a device is transmitting MIDI according to MPE, it will use a range of channels: If the pitch bend or CC data for several notes is summed into one channel, they will clash and the sound will be erratic. This means that when recording the MPE data, your DAW must be able to receive and record multiple channels. In MPE, each note is assigned its own channel so that these messages can be applied to each note individually. By using a separate channel for each note, MPE instruments are able to transmit these controllers individually for each note – without influencing the other notes being performed. For example, if you hold a chord on a normal MIDI keyboard and then move the pitch wheel, all the notes will bend together. An ordinary MIDI controller sends all notes on the same channel so the pitch bend or CCs are applied to all of those notes equally. In conventional MIDI, pitch bend and CCs (Continuous Controllers) are channel-wide messages, meaning that they apply to all notes being performed on that channel. ![]()
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