Model of Moogerfooger MuRF pedal

[tombola]

Because I don't have $500, this is an attempt to copy the architecture of the Moogerfooger MuRF pedal: Product page, based on the manual and some audio samples on the site.

It's eight sequenced resonant bandpass filters. There are controls for resonance, attack and decay. They just about work, within very narrow ranges. I was impressed that it was easy to do in one slot - I've made it polyphonic to beef up the sound a bit.

Finding (and unchecking) the Gain Control switches on the filters was a big breakthrough in this patch.

I ran out of morph groups, so only variation 7 also has the filter frequencies mapped (to the pitch stick), which basically sounds like a phaser, but quite amazing. I don't know if it's possible to attach an LFO to a morph group.

I haven't modelled the level faders on the MuRF, although it would be easy enough - I was more interested in the sequencing side. All the variations have different sequences, some roughly copied from the manual.

There's an input switch so you can use audio in, or white noise, or an oscillator, which can be played - there's defiinitely potential to turn this into a synth.

I've posted this in 'completed' because it works and has variations and assigned knobs, but I'm sure it could be greatly improved by someone with more experience than me.

I guess the main conclusion of comparing this with the sound samples on the site is: Analog Moog hardware does sounds much better than something you can build in an evening on a G2.

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MuRF MF-105 v2.pch2
Description:	An attempt to model the Moogerfooger MuRF - eight sequenced resonant bandpass filters. Unfortunately, NMG2 v.1.32 does not have any facility for accurately modelling hardwood end panels.	Download
Filename:	MuRF MF-105 v2.pch2
Filesize:	4.89 KB
Downloaded:	1956 Time(s)

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[elektro80]

This is great. I haven´t a G2, so I have no way to actually run this patch. However, the MuRF seems to be a oldfashioned stepfiltering patch in-a-box. A great idea.

[BobTheDog]

I Love this, well done.

I'm having great fun putting guitars through this.

All the best

Andy

[mother misty]

Nice patch tombola! I'm having alot of fun putting my machinedrum through this.
Regarding the morph groups, there are some tricks to solve this
* If you take the nord filters instead of the static filters you have res mod inputs, assign a unipolar switch to those and you save 8 morphs
* if you take the "env mod ahd" instead of the "ad/r env" you have attack & decays modulation inputs, assign those to 2 unipolar switches and you save 16 morphs
This is a little more dsp-expensive but you still have 24 free morphs this way (check attachment, red modules are the swithes)
I've also added 8 saturators after the envelopes for a little more dirt
Oh, and yes you can assign a LFO to a morph group. Give the morph group a midi CC, modulate that midi CC with the midi-ctrl send module (see attachment, green modules)

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MURF_MF_105_V2_1.PCH2
Description:		Download
Filename:	MURF_MF_105_V2_1.PCH2
Filesize:	5.44 KB
Downloaded:	1640 Time(s)

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