Temecula DSP Deep/4 is a new, authentic emulation of the Ensoniq DP/4 multi-FX processor for macOS and Windows, with all 46 algorithms.
Many people love vintage synthesizers. Similarly, there are enthusiasts of vintage effects units. For the most dedicated fans, there’s even the Vintage FX book dedicated to vintage effects that looks back at them.
The 1992 Ensoniq DP/4 is a MIDI-compatible multi-effects unit that fits in this category and is still loved by many music producers today. Good news: Temecula DSP has released DEEP/4, an emulation of this legendary parallel multi-FX processor.
Temecula DSP DEEP/4
Deep/4 is a new multi-FX plugin for macOS and Windows that emulates the Ensoniq DP/4 multi-effects processor. According to Temecula DSP, DEEP/4 recreates it at the instruction level. A
All four ES5510 DSP engines are emulated from the original 24-bit fixed-point architecture — mathematically accurate, no approximations, says the developer.
The plugin is still in development, but in its final stages. It’s already available for purchase, and you currently get the first 43 algorithms across 7 categories of the Ensoniq DP/4, including:
- reverbs: hall, large room, small room, large plate, small plate, reverse reverb, gated reverb, non-linear reverb I, II, and III, retrigger reverse reverb
- modulation: 8-voice chorus, flanger, phaser + DDL, EQ + DDL algorithms (chorusm flanger, tremolo, vibrato, panner, DDL with LFO) and 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 shifter + DDL, fast pitch shift
- amp/speaker: Guitar Amp I – III, speaker cabinet, and tunable speaker
- dynamics: EQ compressor, expander, inverse expander, de-esser, ducker-gate, and keyed expander.
Still in development are the Vocoder (Low/Mid1/Mid2/High), the 3.3 Sec Delay 2U, and the Pitch Shift 2U algorithms.
Flexible Routing
Each algorithm also offers a handful of parameters that can be tweaked, allowing you to adjust each effect to your liking.
The emulation is just as flexible as the original. You can run all four FX units in series, split them into parallel paths for layered textures, or use feedback routing to create evolving, self-modulating sounds.
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
Temecula DSP ships DEEP/4 with nearly 300 factory presets organized by unit configuration (1U, 2U, 4U) across multiple banks.
First Impression
I have to admit I haven’t had much contact with the Ensoniq DP/4 so far. I know that the FX is still often found in studios and that it was one of the first deep multi-FX processors.
For those who like retro multi-FXs like the DP/4 and don’t have the budget for the original, you get here an emulation for your DAW at a fraction of the price.
Temecula DSP Deep/4 is available now for $75. It runs as a VST3, AU, and AAX plugin on macOS (native Apple Silicon + Intel) and Windows.
More information here: Temecula DSP
Doesn’t that violate Ensoniq’s intellectual property? If so, I don’t think it’s fair to make a profit from it.
it’s an emulation. The developer recreated the algorithms from scratch. Ensoniq as a company has been defunct for more than 20 years, and its last owners, Creative, who bought it in 1998, are unlikely to be bothered. And since 2002, they shut down Ensoniq so it won’t hurt anybody. It would hurt them if they still sell the product and make revenue from it. That’s no the case.
Hi, thanks Synth Anatomy! And Yura, thanks for looking out for IP rights, but no need to worry here. My plugin is a 100% original creation built from the ground up. It doesn’t contain a single line of the original Ensoniq firmware or code. It’s simply a DSP model I coded myself to pay tribute to that classic sound!
So you code is made by Claude (AI) and not by you? https://news.ycombinator.com/item?id=46471648
I need a statement otherwise as this need to be pointed out.
Hi Tom,
Thanks for the coverage and for reaching out! I’ve always been transparent about my process, so I’m happy to clarify.
Regarding my background: I have 25 years of professional experience in reverse engineering, circuit analysis, and hardware emulation. My expertise is in the 1:1 digital recreation of analog hardware. Before starting my own company, I worked for an Audio/Visual company designing media supply chain software.
I use Claude as a highly advanced compiler, not a replacement for human engineering. For Stargate 626, I manually designed the circuits in Logisim and traced every wire from the original schematics to ensure dead-on accuracy. Here is a blog post that details the work that went into it: https://www.temeculadsp.com/journal/anatomy-of-stargate-626. Only after that rigorous human labor was done did I use Claude to translate my design into a Python emulation, saving months of syntax typing so I could focus purely on audio fidelity. AI requires an expert architect to direct and verify it.
As for bugs or feedback loops: like any complex 1.0 software release, edge cases in different DAWs happen, regardless of whether a human or AI typed the code! I am actively supporting the plugin and encourage any users experiencing issues to reach out so I can squash them.
Best, John
looks very strange
So you are emulating ES5510 DSP but no running the original code?
Than how can it be emulation if you have rewritten all the Ensoniq algorithms? And whats the point in emulating than?
Cool to have the developer chiming in on his process. Hopefully Synth Anatomy approves of your process. Seems to make sense to me.
Thank you Prajna!
DP4 chip emulation plugin is in the works by The Usual Suspects group so we shall have the free opportunity to run the real thing with all algorithms as close as possible