Decapitator

Decapitator models the behavior of overdriven analog stages rather than one universal clipping curve. The five Styles draw on an Ampex preamp, a Chandler/EMI channel, an early Neve channel, and the triode and pentode behaviors of a Culture Vulture. Their harmonic and dynamic responses differ, so switching Style can matter as much as changing Drive.

Its signal shaping is deliberately arranged around the saturation stage. Low Cut and Tone change what enters distortion; High Cut removes brightness generated afterward. This distinction is useful when a bass-heavy input produces loose breakup or a driven vocal develops excessive high-frequency edge. Thump adds emphasis at the low-cut region, and Punish supplies an additional gain push for extreme effects.

Start with a Style and moderate Drive, compensate output level, and compare the actual texture rather than the loudness increase. The Mix control can restore dry transients beneath a heavily saturated layer. Decapitator is consequently useful both as a whole-signal color stage and as a controlled parallel distortion processor.

Manual, Style, pp. 5–7; Drive/Punish, p. 7; Tone and Filtering, pp. 8–9; Mix, p. 10.

Saturation engine

• Style A models the Ampex 350 tape-machine preamp, not a complete tape transport.
• Style E draws on the Chandler/EMI TG channel; N draws on the germanium-transistor Neve 1057.
• Style T / P model triode and pentode Culture Vulture behavior respectively. Compare them with similar drive and compensated output because their harmonic balances differ.
• Drive increases level into the chosen circuit and therefore its saturation. Punish adds a further 20 dB before processing; reduce monitoring level before engaging it on an already driven source.
• Attitude Meter indicates the drive-related internal level, not final output level. It is a character guide rather than a substitute for checking the DAW's output meter.

Tone before and after distortion

Low Cut removes low frequencies before saturation, useful for preventing the bass from dominating the breakup. Thump boosts near that cutoff and can restore weight or deliberately push the low-frequency distortion harder.

Tone is a broad pre-saturation tilt: toward Dark it increases lows relative to highs, and toward Bright it does the reverse. Because it precedes distortion, it changes which frequencies generate harmonics rather than simply brightening or darkening the finished output.

High Cut acts after saturation to remove generated fizz. Steep changes its rolloff from 6 to 30 dB per octave, making stronger bandwidth limiting possible. The manual suggests this as one route toward speaker-like treble reduction, but Decapitator is not a full guitar-amplifier model.

Level and parallel processing

Output sets the processed level. Auto moves Output down as Drive rises, helping make comparisons less dominated by gain changes; still check perceived loudness. Mix blends the original signal with the saturated path. For drums, establish the distorted layer first and then reduce Mix to bring back unprocessed attack. For a send effect, use the wet output and set its amount with the return fader.

Manual, The Decapitator Control Panel: Style, pp. 5–7; Drive/Punish, p. 7; Attitude Meter, Low Cut, Tone, Thump, p. 8; High Cut, Steep, Output, Auto, p. 9; Mix, p. 10.