Computer Music

Subtractive synthesis

become a synth power user

We’re going to begin by looking at the most common form of synthesis, known as subtractive synthesis. In some circles, you may hear subtractive described as analogue synthesis; it is effectively the same thing, but in the case of the latter, the moniker has stuck thanks to subtractive’s association with analogue synthesisers – very much those existing in the hardware world, rather than software. Analogue technology with subtractive synthesis was where it all started, with many of the current crop of synth plugins looking to emulate the early vintage classics. Like most audio-related matters, subtractive works on a principal of a signal chain, so we’ll begin at the front of this chain, with the oscillator.

In literal terms, the oscillator emits a pulse a number of times per second. The more frequent that these pulses become, the closer together they are, with the consequence being that as they increase in frequency, the sound moves from a singular pulse to something which sounds like a pitch.

The frequency of these pulses is measured in a unit known as Hertz, which literally translates as ‘cycles per second’. Even if you’re not

You’re reading a preview, subscribe to read more.

More from Computer Music

Computer Music5 min read
#04 Sequencer-based Drone Building With BazilleCM
Download the accompanying video and the MIDI/audio files at bit.ly/cm334downloads > Before we get started this month, let’s just make sure that we are talking about the right kind of drone! We certainly aren’t talking about any form of flying machin
Computer Music4 min read
Oeksound Bloom £169
> Oeksound has become the developer to watch. It has big support for its small number of plugins, with their often dynamic and adaptive natures processing your signals as you go. Titles like Spiff control transients while the multi-award winner Sooth
Computer Music10 min read
Building Effected Vocals
You may well be drawn to reading this feature based on the fact that you make a type of music that will benefit from one of these forms of vocal processing. The undeniable fact is that many of these processed elements have become intrinsically linked

Related Books & Audiobooks