MATRIXSYNTH: Tidal Quad Filter

Friday, May 26, 2006

Tidal Quad Filter

This one just popped up on AH, pictured here, next to the MFB. I can't seem to get to, so title link takes you to info on Details pulled below. Also on

Update via elmacaco on AH:
"The specs up on Matrix synth seem like they include most of the info, but
I'll add a few bits that I like.

It's a quad filter, and each filter has 4 jacks associated with it, In, Out,
CV and ENV (Gate). The ENV input is obviously for triggering the associated
AR envelope with a gate instead of using the envelope follower or audio
triggering. The input jack is actually A TRS jack, with in /out/ and
ground, which I think lets you use it on some insert jacks with just a
stereo cable. Also, with nothing plugged into filter 2's audio in jack the
signal from filter 1's in gets routed to filter 2's input. This is mirrored
for filter 3 and 4 as well.

While there are 4 filters, there are 2 LFO's, so two filters share one LFO,
and each filter has a bi polar mod amount pot. Waves are Tri, Square and

All filters self oscillate in all modes, although BP mode has a narrower
range of self oscillation.

The filters sound great, I use them quite a lot as they have pretty much
everything you need right there. The two modes of waveshaping are great,
I've mostly used them on percussion sounds, but they have a wide range and
what I find to be a big sweet spot.

One of my favorite things on this unit is the 'punch' switch. It makes the
envelope hit harder somehow. Now this unit is optimized for fast response
since using it with a 'drumcomputer' was understood to be a common
application, but the punch switch just adds a great smack to the sound. Add
that with the waveshaper engaged and it's just bananas.

The website formerly had some pics of 2 Quad units racked side by side,
giving you 8 filters in about 5 rack units, it was a pretty sight.

Build quality is very good, the unit is solid, the pots are firmly attached
and not the wobbly kind you see more and more.

Theo Hogers is the man behind Tidal, and I ordered my unit directly from
him, his contact info is here :

Tidal Music Piksenbrink 186 NL-7544 BK Enschede FAX
+31/534765321 Phone +31/534765321 Theo Hogers"

4x Cutoff
Controls the cutoff frequency of the filter
4x Reso
Controls the filter resonance
4x Shaper
Selects the filter: low-pass, band-pass or high-pass
4x Shape (1/2)
4x ?
4x Punch
4x Env Sense
Controls the envelope follower sensitivity
4x Env Mode
Selects an envelope mode
4x Env Attack
Controls the envelope attack time
4x Env Release
Controls the envelope release time
4x Env Depth
Controls the depth of the envelope sweeps
4x LFO Depth
Controls the depth of the LFO sweeps
2x LFO Rate
Controls the rate of the LFO
2x LFO Wave
Selects the wave-form of the LFO Various
SchneidersBuero about the Tidal Quad:
The Tidal Quad is a 4-channel filterbank with extensive control and modulation possibilities. The filter can be used in High-/ Low-/ or Bandpass with an Envelope follower for each mode. There is also an LFO for each set of 2 Channels which allows complex modulations. Additionally it offers a Waveshaper for each channel. For friends of analog distortion this unit leaves no wish open.
4x HP/BP/LP - Filtermodule
LFO Channel 1+2 (Cutoff)
LFO Channel 3+4 (Cutoff)
LFO each channel positive or negative switch
1 Waveshaper per Channel
4x Sidechain Input with Envelope Follower for Cutoff-Modulation
the Tidal Music homepage about the Tidal Quad:
The resonant filter might be the most important effect in popular music these days. However if you want to insert a filter on multiple channels of your mixer and also would like to have a lot of knobs and modulation possibilities, there was no real solution. That's why Tidal Music Electronics announces it's four channel desktop multimode filter. You can switch the four individual resonant filters between Lowpass, Bandpass and Highpass modus. Each filter can be modulated by an envelope follower, a LFO and an external CV. The envelope follower is specially designed to track percussive sounds without false triggering, a key feature when used with drumcomputers, grooveboxes or guitar.

Maximum Modulation
Each filterbank has 4 VCFs, 4 Waveshapers, 4 Envelopefollowers and 2 Low Frequency Oscillators (LFOs).
The filters are switchable between 3 modes, Lowpass, Bandpass and Highpass. The Low- and Bandpass are 24 dB and the Highpass is 12 dB/Oct.
The cutoff of each channel can be modulated by it's own Envelope follower which can be fed by a sidechain input or by the audiosignal itself. This option gives you the possibilities to create very funky filter-effects.
Each LFO modulates 2 channels and every channel has it's own depth controller which can be set positive or negative. This can be used to generate cool stereo effects.
The Waveshaper
The waveshaper is one of the components which give the filterbank it's unique sound. It actually is a wavefolder which "folds" the tops of the waveform back instead of clipping. This sounds a bit like an overdrive but also has some characteristics of Frequency Modulation.

To give you a better idea what the waveshaper actually does we'll illustrate what happens with a simple sine wave using different ratio settings for each of the two shaper modes.

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