Signal Processors

Elta Music have put the heart of the celebrated Soviet synthesizer into a convenient desktop box.

This 8‑pole variable character stereo filter has an analogue core with digital control...

Euporie is a ‘multi‑response’ analogue low‑pass filter whose resonance can be switched between a Moog and Sallen & Key characteristic, giving you two filters for the price of one.

Just over a year ago I reviewed the Tiptop Audio Z‑DSP NS. It's a large, flagship, modular effects processor...

The classic triple band-pass filter has been around a long time. Doepfer and Analogue Systems had them long before the...

Described as a four-band preamp, overdrive and distortion module, the M G D–2 puts guitar pedal power at the heart of your Eurorack.

The ADDAC611 is not your typical filter. It is noisy, rough and sometimes violent, the Peaky Blinders of filters. This of...

The Quad Peak Animation System, aka QPAS, is a filter aimed primarily at stereo imaging and animation.

Thanks to its multi-axis approach, Planar 2 offers much more than traditional joystick controller designs.

Fixed filter banks have been part of the synthesist's armoury almost since the appearance of the earliest Moog modular synths...

Built to Schlappi's same exacting standards, this all-analogue module can be an oscillator, LFO, filter or waveshaper...

Interstellar Radio is "a faulty transmission line", whose wholly analogue design converts incoming audio to a high frequency pulse train then back again.

Looking for pre-mixer sweetening? Finaliser R‑EQ offers three-band parametic EQ, a two-way aural enhancer that works on the top and bottom end of the audio, and basic DSP effects like reverb and delay.

Vowel is a digital oscillator module with all the gubbins you might need in order to get vowel sounds with just a trio of controls.

Clearly aimed at the cost-conscious end of the market, the Forbidden Planet filter embodies its quintessentially analogue namesake thanks to a 2-pole, 12dB/oct filter inspired by the 1975 Steiner-Parker Synthacon...

Dendrites is a compact filter module consisting of 16 modes, accessed from a central encoder. Each group of low-pass, band-pass, high-pass and phase-shift filters is represented by a different coloured LED...

Classic low-pass gates are probably best associated with the Buchla modulars. However, Rabid Elephant decided against the vactrols, aiming to produce something faster, more accurate, durable and natural-sounding.

Developed in conjunction with Matthias Puech, the 4MS Tapographic Delay is a hands-on 32-tap delay with a maximum delay time close to three minutes.

Formant Filter offers morphing between three different vowel sounds and via parallel band-pass filters, it delivers convincing vocal tones...

Rainmaker consists of a stereo 16-tap spectral delay paired with a 64-tap comb resonator, the latter sporting external triggering options that turn it into a (single-voice) Karplus-Strong synthesizer.

The original E-mu Morpheus was capable of real-time morphing in just one dimension, but today’s processors have much more power and can therefore offer 3D morphing — and in stereo.