Friday, April 3, 2020

Solaris reverb, feedback, and diagrams: Where the past listens to the future

"Where the past listens to the future"

In directed acyclic graphs, one of the defining rules is that a variable cannot cause itself. In "reciprocal" chicken or the egg situations the question needs to be depicted by indexing variables by time.

   Without diving too deeply into my growing elementary understanding of analytic methods for causal inference, I always come back to schematics and feedback paths in schematics. The state variable filter is a design that has always interested me, and Beavis Audio Flaming Howl of Death mod for the fuzz face was another crazy example.  Basically tapping a connection at some point after the circuit input and connecting it back to the input. This creates a feedback loop in which the signal is fed back into itself for chaotic results.

With delay and reverb type of circuits, the output of the affected signal can be fed back to the input of the signal to create some fun results. In delay circuits this achieves the "repeats", in a reverb circuit this regeneration of the signal creates a deeper reverb that migrates towards self oscillation.

I plan on revisiting the Solaris reverb and making modifications to the circuit that are informed by my experimentation and understanding of time-based effects as well as making some modifications. 

My goal is to maintain the character of the source material, but to put more of my spin on it.
This includes a modification to the affected signal, the feedback control, and the bypass signal. One of my personal issues with some time based effects is the use of mechanical 3pdt true bypass switching.  This can result in a ridiculously loud echo for the popping of the mechanical switch.  Sometimes this can be cool, other times it can be annoying if you are trying to "ease" into a part. 

I'll keep posting my progress and thoughts about this reverb project as we continue along this year.