37 PROTON User Manual
Release Time – The nal stage of the envelope. Specied as the time taken for the envelope to reach zero once keys have been released.
Resonance – The emphasis of frequencies centered on the cuto frequency.
Sample & Hold (S&H) – the sampling of a waveform, typically that of an LFO or noise source, to provide a series of voltages at a set rate.
Sawtooth – A waveform resembling the teeth of a saw, with an instantaneous leading edge followed by a gradual decline to zero point.
Self Oscillation – The point at which a lter starts to produce a sine wave output owing to excessive use of resonance.
Semitone – A measure of pitch. Each octave contains 12 semitones.
Sequencer – A part of the synthesizer which can be programmed with a series of notes and/or chords which are then repeated back at a
selected tempo.
Signal Flow – The path of a signal from one part of the synthesizer to another.
Sine Wave – A smooth waveform that contains only the fundamental frequency with no harmonics.
Square Wave – a symmetrical waveform which changes instantaneously from zero state to full.
Sustain Level – The third stage of the envelope. This is the level that the envelope holds at after decay until keys are released.
Synchronization (Sync) – Co-ordinating the timing of devices where one is the master and the other(s) are synchronized to it.
Trigger – The activation of a function, for example pressing a key to start the Envelope cycle.
Tune – The adjustment of the pitch of an instrument to be the same as that of another instrument; or the adjustment of one oscillator to
be in tune with the other.
Unison – Two or more voices played together on the same key(s).
Universal Serial Bus (USB) – An interface that can be used to connect your synthesizer to a DAW, or to receive rmware updates.
Velocity – The strength at which the keyboard is played, which can be used as a modulation source.
Voltage Controlled Amplier (VCA) – An amplier whose level can be adjusted by control voltages, for example from an
envelopegenerator.
Wavefolder – A circuit that allows a wave to be folded back onto itself, producing dierent harmonic content.