# 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="https://4148137667-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvkMElNCYnDaBJfC78R6c%2Fuploads%2F4pqyMUCniBmi4lOUoDeD%2Fimage.png?alt=media&#x26;token=cfb2b3ef-239d-449a-88e8-736d4ec7a481" 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="https://4148137667-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvkMElNCYnDaBJfC78R6c%2Fuploads%2F3uE1rUInEZse73N3MdSf%2Fimage.png?alt=media&#x26;token=6a830ca4-5cdf-4118-a7d4-a3bfdfd787e9" 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="https://4148137667-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvkMElNCYnDaBJfC78R6c%2Fuploads%2FSASp2u7MhY9P1IKCbqEM%2Fimage.png?alt=media&#x26;token=385f907a-e33d-4ffa-9964-79289a8c0cea" 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="https://4148137667-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FvkMElNCYnDaBJfC78R6c%2Fuploads%2FCBQhqhZzBFshmy2H0E0W%2Fimage.png?alt=media&#x26;token=4fa72c40-3b93-4573-9b5f-f83f4f814b8c" alt=""><figcaption></figcaption></figure>

Quick, make a million dollars on a new pedal!