The viva Analog Mu3 DIY Kit gives you the opportunity to build a working replica of my viva Analog Mu3 Auto-Filter pedal // my take on the classic “Mustronic Mutron-III” state-variable (biquad) auto-filter …
My original improvement mods to the vintage Mutron-III circuit, posted many eons ago at my other website, include a way of matching the UP/DOWN mode sensitivity so that resetting of the controls is not warranted … something that has since been adopted by the current Mutro-III pedal maker!
This build requires a pair of well-matched Siliconics (now Advanced Photonics) NSL-32 opto-couplers (details on how to do this is provided at my work forum) … as well, several other customizabilities are possible … for example, the box graphics below show top-mounted jacks (eg., for saving space on a pedal board) but these can be mounted on the side as is usually done with most FX pedals …
This circuit exhibits high headroom and can handle the output signal of any preamp (tube or solid-state) without distorting … on top of that it can be operated without input/output signal caps for extreme fidelity // making it a professional grade effector!
Here’s a brief clip showing how a super dynamic BASS-synth effect can be created by using the viva Analog 360+ PRO preamp (with Fuzz section engaged) going into the viva Analog Mu3 Auto Filter:
The kit includes a detailed instruction booklet (suitable for beginner DIY’ers), a quality fabbed PCB, and membership to my work forum where extra support is available.
>>> GETTING REGISTERED AT MY WORK FORUM
In the Paypal “note” (box) please indicate your choice of login name for my forum // I will register you upon completion of order