A tutorial for learning the basics of subtractive synthesizers
The three attributes of sound: pitch, tone, and volume
Sound has three basic attributes; pitch, tone, and volume.
To control these attributes, subtractive synthesizers provide the
oscillator, filter, and amplifier sections.
The oscillator settings vary the pitch, the filter settings modify the tone, and the
amp settings modify the volume.
Analog synthesizer architecture
The analog sound production chain uses what is called ‘subtractive synthesis’. The basic sound generator, or oscillator, creates a tone with a rich harmonic content; the filter then “subtracts” harmonics to create new variations on the original timbre. Subsequent circuits (an envelope generator in conjunction with a VCA, or voltage-controller amplifier) alter the level in a precise way to create dynamics.
Modulators - EG, LFO, keyboard tracking, and controllers
In addition to the sections described above, a synthesizer provides ways in
which the sound can be varied according to time, key range, or various types of
performance expression. These are controlled by modulators or controllers such
as EG (envelope generator), LFO (Low Frequency Oscillator), keyboard tracking, and the Pitch and Mod wheels.
All together, these controls can be physically maniputlated with a panel that looks something like a favorite synth of mine, the Arturia MicroBrute.
Yves Usson. This guy is a synth-maker pioneer. Obviously.
