Mixer Volume Taper

Hi. This is my first post to the forum. I have been using my Kinotone Ribbons and really love this device. I make experimental music using mostly “cracked” electronics. I especially love the touch effects available in this pedal. My favorites so far are the degradation loop and the magnetic dace effect.
I have noticed that with the mixer knob centered I hear about 50% volume levels for each. With the mix knob completely to the right or left I get 100% volume level for either wet or dry. This leads me to believe the taper is linear from left to right and vice versa, resulting in the 50% volume levels when the mix knob is centered. I’m wondering if it’s possible to adjust the volume taper to be more curved – like a DJ crossfader – so that both signals are near 100% when the mixer knob is positioned in the center. I hope all of this makes sense. Thanks!

Hi @toner ! Thanks for sharing your thoughts on this. You are spot on in that we use a linear crossfade.

In general, Ribbons is a guitar pedal so my assumption was that the dry/wet mix knob would mostly be used to obtain a chorus effect when used in combination with the tape effects.

I thought it would best to use a linear taper for this because the dry and wet signals are correlated, so you end up with about equal perceived volume as you crossfade between dry and wet.

Now, Ribbons is a little different because the mix knob also serves as a global volume control for magnetic dance, loops, etc. Those signals are uncorrelated and so an equal power curve might be more suitable.

Orange is the current crossfade approach, dotted blue is a fast approximation of an equal power curve.

I don’t want to go the DJ mixer route because that could lead to a +6dB boost when at the mid point. I haven’t ever looked at a DJ mixer schematic but I think they might do something like an equal power curve too.

I’ll play with some things in the firmware and get back to you.

Thanks for the response. Here is an article I found about the history of the DJ crossfader. It looks like there are some variations as well as some mixers that have multiple options.

I started wondering about how my Red Panda Tensor pedal’s “blend” knob works as this “seems” to have a curved taper. I don’t actually know the taper, but after digging into the manual, the volume mix “blend” knob seems to depend on the bypass option you’ve selected.

OK, that’s all I’ve got for now. Thanks for the discussion and thoughtful response.