Event at start and/or end of note

An edge detector will emit a trigger at the rise and/or fall of a gate

If you patch the note gate from a keyboard or sequencer to a rise/fall detector, you can use the resulting trigger or gate to make something else happen (play a sample, strike a low-pass gate, fire off another envelope, etc.) upon note onset and/or releases.

Note: rise/fall detection is uncommon as a standalone, exposed utility feature.

Example:

• create a “standard” keyboard- (or sequencer-based) voice with pitch —> VCO —> filter —> VCA voice, including an ADSR (or ASR) to shape the note through the filter and/or VCA
• mult the keyboard/sequencer gate to the rise/fall detector
• patch the output of the detector to the strike input on an LPG
• patch a noise source to the LPG
• combine the output of the LPG and the voice in a mixer

Result: depending on whether you’re detecting rise, fall or both, a percussive element is added to the start and/or end of each note played

Video example (begins at 11:37):

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