Golden DSP
Pyrosphere Manual
Get Pyrosphere
Docs›Pyrosphere Manual›Sound Engine

Drive

A live picture of the saturation curve. What you see is what the signal goes through.

The Drive panel: On and Comp switches, the curve box showing the Tape shape, five shape thumbnails, the Ceiling knob at −1.0 dB and the readout TAPE 7.0 dB.
The Drive panel at its default settings.

Overview

Drag inside the curve box to set how hard the signal is driven, click a thumbnail to change the shape, and watch the curve bend. The readout under the box shows the shape and the amount, for example TAPE 7.0 dB.

On

DefaultOn

Switches Drive in or out.

Heat

Range0 – 36 dBDefault7.0 dB

Sets how hard the signal is driven into the shape.

Drag up or down inside the curve box, or scroll over it. Hold Shift for fine moves, and double-click the box to reset.

Shape

DefaultTape

Chooses the saturation curve.

ShapeCharacter
SoftGentle, rounded saturation.
TapeWarm compression of peaks.
TubeRich, slightly asymmetric colour.
HardFirm clipping with an edge.
FoldWavefolding: peaks fold back on themselves for metallic, aggressive tones.

Ceiling

Range−24 – 0 dBDefault−1.0 dB

Sets where the shape flattens out.

The dashed lines in the curve box show it.

Comp

DefaultOn

Drive Compensation: evens out the level as Heat rises.

With Comp on, turning Heat up changes the tone without simply getting louder, so you can judge what the drive is doing.

Bias

Range−1.00 – 1.00Default0.00InAdvanced drawer

Pushes the waveform off-centre before shaping, for even harmonics.

Watch the curve go lopsided as you turn it. Find it in the Advanced drawer.

Hard and Fold create more high harmonics. Raise Oversampling in the Engine panel to keep them clean when you push them.

Pyrosphere 1.0.0 · Manual 1.0 · Updated November 10, 2026Questions? Contact support