Learn Synthesis with Pure Data S01E06
August 24, 2021

Learn Synthesis with Pure Data S01E06 – Adding MIDI Pitchbend to Our Synthesizer

MIDI Pitchbend in Pure Data

Learn Synthesis with Pure Data S01E06 – Making an ADSR Envelope in Pure Data

Learn Synthesis with Pure Data S01E06 – Making an ADSR Envelope in Pure Data

Envelopes are used in multiple ways to create shapes over time in synthesis. The most common use for envelopes is to control amplitude, hence the amplitude envelope. The ADSR envelope is the most common amplitude envelope and is found in use in most synthesizers whether they are analog or digital. This episode shows you how to make an ADSR envelope in Pure Data and a a GUI to control the attack, decay, sustain, and release segments. This will allow us to have better control over the amplitude of our synthesizer’s signal.

Envelopes are used for many things in synthesis. The most common usage of an envelope is the shaping of amplitude. The most common type of amplitude envelope in synthesis is the ADSR envelope, which stands for Attack, Decay, Sustain, and RElease. This shape allows one to set the amount of time it takes for the beginning of a sound to rise to a peak amplitude. Then, the decay segment allows one to set the time for how long the sound takes to reduce to a lower, sustained level. The sustain setting allows one to set how strong in amplitude the sustained portion of the sound as compared to the peak amplitude in the attack. When one releases the note, the release aspect of the envelope controls how long it takes for the sound to fade out to silence.

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