Hardware character — Op-Amp and Tape

Every band has its own Op-Amp and Tape stage. Switch on the Hardware Character master gate in the stage drawer, pick a flavour per band, and the EQ stops sounding clean — it starts sounding like console plus tape.

Op-Amp

Three Op-Amp models plus Off, selectable per band:

Off

The band's signal passes through clean — no op-amp colouration.

N (Neve)

Approximates a Neve 1073 transformer + discrete op-amp pair. Strong 2nd-order harmonic generation, gentle transformer-hysteresis approximation, slight high-frequency roll-off above ~16 kHz. Adds warmth and a sense of weight; best on vocals, bass, and any band that wants to sound "thick".

A (API)

API-style discrete op-amp signature. 3rd- and 5th-order harmonics dominate, with a faster slew rate than N. Adds aggression and forward midrange — best on drum bus bands, snare, and electric guitar.

S (SSL)

SSL IC op-amp signature. Nearly transparent, with subtle even-order content at high drive. Use S when you want the band to feel "engaged" without any obvious tonal shift — mastering bus, mix bus.

All three are processed with ADAA (Anti-Derivative Anti-Aliasing) first-order plus 2× FIR polyphase oversampling, so the harmonic generation stays free of aliasing even at high gain.

Tape

Two tape speeds plus Off, with a continuous Bias knob:

Off

No tape stage.

15 ips

Slower tape, more head bump in the low mids, more self-erase in the lows, darker high end. Adds weight and analog softness — try it on bass busses, kick groups, and mastering moves that want a vintage colour.

30 ips

Faster tape, brighter, more transient retention, less low-end self-erase. Adds sheen without darkening — try it on full mixes that want to sound "tape-finished" without losing top.

Bias

0 to 1, with 0.5 = normal bias. Under-bias (below 0.5) opens up grit and additional harmonic content; over-bias (above 0.5) smooths the signal and rolls more high end off. Bias interacts with Tape Speed — 15 ips with under-bias is gritty and dark; 30 ips with over-bias is silky and forgiving.

The tape stage chains: low-frequency self-erase shelf → tanh saturation → high-frequency roll-off.

Master gate

The Hardware Character card has a master power switch at the top. With it off, none of the per-band Op-Amp or Tape stages run, regardless of how each band is configured — useful for A/B-ing the whole character section in one click.

Visual feedback

When Hardware Character is engaged, the Hardware Overlay on the EQ display draws a coloured glow behind each band's disc — colour depends on Op-Amp choice (N / A / S) and intensity is RMS-driven, so loud bands pulse harder. See EQ display.

Tips

• The Op-Amp and Tape stages add the colour at the band frequency — they're not bus-wide colourations. A LowShelf band with Op-Amp N and Tape 15 ips colours only the lows; the rest of the mix stays clean.
• Match the Op-Amp to the genre: N for warm/vintage, A for aggressive/rock, S for transparent/mastering.
• Tape bias is the secret knob — small movements around 0.5 change the saturation character significantly. Try 0.3 for grit, 0.7 for glue.

See also

• Pultec low-end
• Density stage
• Global stages (master bus) for the bus-wide character options.