Best Clean Blend for Big Muff:SplitnBlend VS Simple JFET Blend VS Anything Else?

[Bandwagonesque]

hi everyone. I am needing to install a clean blend and its been so long that i've forgotten how my own experiments have gone in regards to this very question on a rat build from years ago. it seems like i settled on the split n blend, but when its all the way CCW, there is a tiny bit of bleed. otherwise it seems to work well. i remember using the simple jfet booster and running into issues.

now I am needing to use it on a muff and was wondering if anyone has put a clean blend in a muff into practice and what they settled on with the most flawless results. for this circuit i've heard either are rather friendly but asking now just to be sure and to save myself a small bit of time. I'm deciding between the 2 following circuits and considering anything else that can be suggested too. Thanks again forlks and take care. and thanks for reading.

[rankot]

Sorry for late reply, but I missed this post - I didn't build any of those, but I simulated them, as well as two other blend circuits - one with two op amps and dual linear blend pot, and another one with four op amps and single linear pot. You can see output of all circuits as well, so you can adjust and build whatever you like.

[rankot]

And for the reference - simple mathematical addition of two signals, so you can compare to output of circuits above.

This wouldn't work without other circuitry in real world, due to different impedances of sources and output etc.

[iainpunk]

a trick i learned was to do this with a big muff:

its both a mix level, and to keep the muddyness of mixing at bay, it works as a filter for the clean signal as well as the distorted signal. if you have the bass scooped on the distortion, the clean has its trebble scooped and vice verse. another fun extra is that the clean midrange comes throug, which is super great for bass

cheers, Iain

[Elijah-Baley]

Sorry for late reply, but I missed this post - I didn't build any of those, but I simulated them, as well as two other blend circuits - one with two op amps and dual linear blend pot, and another one with four op amps and single linear pot. You can see output of all circuits as well, so you can adjust and build whatever you like.

I'd appreciate some explanation of what I'm seeing in those graphic.
Thanks!

[rankot]

I'd appreciate some explanation of what I'm seeing in those graphic.
Thanks!

All the graphics I posted are showing output of those blend circuits with different values of blend pots, ranging from 0-100% rotation.

• Output of an op amp based mixer with op amp buffered inputs.
• Output of a single JFET blend circuit, first input buffered with a source follower, second input unbuffered, just like the Simple FET Blender from the original post.
• Output of an op amp based mixer without buffered inputs, but using cross wired stereo pot for mixing them.
• Output of a dual JFET blend circuit, the one shown as Split'n'blend in the original post.

[soggybag]

a trick i learned was to do this with a big muff:

its both a mix level, and to keep the muddyness of mixing at bay, it works as a filter for the clean signal as well as the distorted signal. if you have the bass scooped on the distortion, the clean has its trebble scooped and vice verse. another fun extra is that the clean midrange comes throug, which is super great for bass

cheers, Iain

What's going on here? Looks like the out of phase signal is being used to cancel the signal at the at low pass and high pass filters on either side of the tone control?

[iainpunk]

a trick i learned was to do this with a big muff:

its both a mix level, and to keep the muddyness of mixing at bay, it works as a filter for the clean signal as well as the distorted signal. if you have the bass scooped on the distortion, the clean has its trebble scooped and vice verse. another fun extra is that the clean midrange comes throug, which is super great for bass

cheers, Iain

What's going on here? Looks like the out of phase signal is being used to cancel the signal at the at low pass and high pass filters on either side of the tone control?

both signals are filtered enough that the 180 phase flip doesn't matter.
to explain it, ill use superposition:
the BMP tone set to the left most setting (traditional bass side), lets the low freq's through from the muff
the same tone stack reversed lets the mids and trebble of the clean signal through.
these signals will then be added to eachother.
with the control set in the middle, it is a band-stop (notch) filter for the fuzz side
the same setting is like a band pass filter for the clean side.
both the scooped fuzz and mid-rangey clean get added
and this also happens with the treble setting, the high frequency's of the fuzz and the mids and bass of the clean get added.

cheers, Iain