Introducing the Temecula DSP DEEP/4

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DEEP/4 is a painstaking recreation of one of the most powerful multi-effects processors ever built. Every algorithm has been rebuilt at the instruction level from the original 24-bit DSP hardware, preserving the exact digital character of the algorithms that made these units legendary in studios worldwide.

All 43 original algorithms, mathematically verified against the original DSP architecture. No guesswork.

Features

Four Independent Effects Engines

The DEEP/4 is a powerhouse multi-effects processor featuring 43 fully programmable, high-fidelity algorithms including reverbs, chorus, flanging, delays, distortion, and pitch shifting. Operate it as a single massive effects system, a pair of stereo processors, or four entirely independent units. Its advanced routing matrix supports true serial, parallel, and feedback configurations to sculpt complex effect topologies that conventional units simply can't touch.
Flexible Multi-Unit Routing

Run all four units in series for massive effect chains, split them into parallel paths for layered textures, or use feedback routing to create evolving, self-modulating soundscapes. DEEP/4 provides independent routing control for each pair (A/B and C/D) plus a main bus link — supporting serial, parallel, and two feedback configurations with adjustable feedback amount. Use it as a single 4-unit processor, two independent stereo pairs, or four standalone effects.
43 Algorithms Across 7 Categories

From lush reverbs and complex multi-tap delays to pitch shifters, dynamics processors, and guitar amp simulations — every algorithm from the original hardware is here, rebuilt at the instruction level and fully programmable.

REVERB
Hall
Large Room
Small Room
Large Plate
Small Plate
Reverse Reverb
Gated Reverb
Non-Linear Rev I
Non-Linear Rev II
Non-Linear Rev III
Retrigger Reverse Reverb
MODULATION
8-Voice Chorus
Flanger
Phaser + DDL
EQ Chorus + DDL
EQ Flanger + DDL
EQ Tremolo + DDL
EQ Vibrato + DDL
EQ Panner + DDL
EQ DDL with LFO
Rotating Speaker
DELAY
Multi-Tap Delay
Dual Delay
Tempo Delay
3.3 Sec Delay
EQ / FILTER
Parametric EQ
Vanderpol Filter
Rumble Filter
VCF Distortion
PITCH
Pitch Shifter
Pitch Shift + DDL
Fast Pitch Shift
AMP / SPEAKER
Guitar Amp I
Guitar Amp II
Guitar Amp III
Speaker Cabinet
Tunable Speaker
DYNAMICS
EQ Compressor
Expander
Inverse Expander
De-Esser
Ducker / Gate
Keyed Expander
Preset Management

Browse nearly 300 factory presets organized by unit configuration (1U, 2U, 4U) across multiple banks. Save your own custom presets, overwrite them as you refine your sound, and mark any preset — factory or user — as a favorite for instant recall. Step through presets with prev/next navigation for fast auditioning."