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Re: OT: Aftertouch



Title: Re: OT: Aftertouch
At 6:03 PM -0700 9/4/01, Om_Audio wrote:
I am considering the Roland A-33 midi keyboard controller- it does not have aftertouch- what is aftertouch?

Aftertouch (also called "Channel Pressure" or "Key Pressure") is a MIDI control message that is sent out when you press down on a key. The harder you press, the higher the value. It can be used to control such things as pitch, filter cutoff, amplitude, etc.  There are actually two kinds of Aftertouch. Monophonic Aftertouch (Channel Pressure) sends out a single stream of control messages on a single MIDI channel. If several keys are being pressed at the same time the highest value is the one being sent. Polyphonic Aftertouch (Key Pressure) sends a separate control stream for each key on the keyboard. This is much less common than Channel Pressure.
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