Granular synthesis: a sample under the microscope
Shatter a recording into grains and a frozen sound becomes a cloud you can walk through.
Time-stretching hid its slicing and hoped you would not hear it. Granular synthesis turns the slicing into the instrument. Take a recording, cut out a tiny piece — a grain, some tens of milliseconds — fade its edges, and fire off dozens of them per second, overlapping into a continuous cloud. The recording stops being a timeline you play back and becomes a landscape you stand in: you choose where, and the cloud sounds like that place.
The four handles of the cloud
- Position — where in the recording the grains are taken. Sweep it slowly and you walk through the sound; park it and you freeze a single instant forever.
- Size — how long each grain lasts. Long grains keep the source recognizable; tiny ones dissolve it into texture and eventually into pitched buzz.
- Density — how many grains per second. Sparse is pointillism; dense is a wash.
- Spray — random scatter around the position. Zero is a laser; wide is weather.
The amber flecks are the actual grains being fired into the chord texture. Park position somewhere and shrink size until the source dissolves; open spray and watch the cloud widen; then sweep position slowly with high density — that endless frozen swell is the granular signature you know from a decade of ambient records.
This one is Tonverk's home game: the GRAINER machine is this widget as a professional instrument — the four handles map one-to-one, plus per-grain TUNE, direction, and shape. No other device in this catalog does granular; this is a reason the Tonverk exists: