# 4-phase LFO driven mixer

I came up with something that I don't think I'd tried before, based slightly on Patreon supporter Mark Davis' mention of the Shepard function.  This is somewhat reduced from what I would have liked due to running out of instructions.  But it's still pretty unusual as modulations go.  

[4-phase-filters-001.spcd](https://github.com/HolyCityAudio/SpinCAD-Designer/raw/master/patches/4-phase-filters-001.spcd)

Can you figure out what is going on?

<figure><img src="/files/vZyld8ct5oIKqctpQ2FU" alt=""><figcaption></figcaption></figure>

I also created another patch [4-phase-filters-002.spcd](https://github.com/HolyCityAudio/SpinCAD-Designer/raw/master/patches/4-phase-filters-002.spcd) that leaves off the slicers and smoothers so that I can use another independent filter. &#x20;

<figure><img src="/files/GceUnESTwrFmkGwv6frG" alt=""><figcaption></figcaption></figure>

What is going on is that the sine waves are using the 4 mixer channels to fade the various filters in and out.  At the same time, the filters' center frequencies are being varied.  But those two control signals may come from a different phase of the LFO for each of the 4 filters.  You could also connect all of the filter control inputs to a single phase, or anything in between.

**Boy this patch just keeps on giving, I tell you**

I replaced a filter with a chorus whose width varies along with one of the LFOs and added a pitch shift of a fifth up (7 semitones) on another one of the phases.  This is a very unusual sound and I am not sure I've heard anything like it.  [4-phase-filters-pitch-chorus.spcd ](https://github.com/HolyCityAudio/SpinCAD-Designer/raw/master/patches/4-phase-filters-pitch-chorus.spcd) Try also using  an interval of 12 semitones (1 octave) in the pitch shift block.&#x20;

<figure><img src="/files/tlBe5eDRxmO602tj5r3H" alt=""><figcaption></figcaption></figure>

#### More patches based on this concept

[4-phase-filters-2-pitch-chorus.spcd](https://github.com/HolyCityAudio/SpinCAD-Designer/raw/master/patches/4-phase-filters-2-pitch-chorus.spcd)

<figure><img src="/files/8bgZnt3qK0TwHzboDlg5" alt=""><figcaption></figcaption></figure>

Quick, make a million dollars on a new pedal!


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