High Pass / Low Pass Filter

[Danbieranowski]

I'd love a board with a simple High Pass and Low Pass filter. This could be used for tightening up low-end for distortion circuits or creating a "lo-fi" effect. Maybe splitting a signal into two different sets of bands (like the old clean low end / distorted high end for bass). All kinds of fun stuff.

 

[giovanni]

Pro-filter?

 

[Big Monk]

I'd love a board with a simple High Pass and Low Pass filter. This could be used for tightening up low-end for distortion circuits or creating a "lo-fi" effect. Maybe splitting a signal into two different sets of bands (like the old clean low end / distorted high end for bass). All kinds of fun stuff.

You want a board with separate high and low pass filters?

There’s also this:

Muffin Crumb Tone Control Stage - PedalPCB.com

Retro-fit Tone Control

www.pedalpcb.com

 

[Danbieranowski]

Pro-filter?

It’s somewhat close but it would be much more functional if there was a frequency knob for both. So you could set the width of the band that is passing through. For example maybe you want 100hz-6k. Or maybe you want 20hz-250hz. Like what would be used in a standard recording EQ.

 

[Danbieranowski]

You want a board with separate high and low pass filters?

There’s also this:

Muffin Crumb Tone Control Stage - PedalPCB.com

Retro-fit Tone Control

www.pedalpcb.com

I made it a little more clear what I was looking for in my other response. Take a look if you have any ideas.

 

[Feral Feline]

Pedalblock tone control is essentially a Muff tone stack. Not relevant to the HPF or LPF I’m after for cleaning up my bass signal.

It’d be cool if the filters were offered separately in a form factor that fits 1590a, but can still be thrown together in a 1590b or 1590n

 

[Big Monk]

Pedalblock tone control is essentially a Muff tone stack. Not relevant to the HPF or LPF I’m after for cleaning up my bass signal.

It’d be cool if the filters were offered separately in a form factor that fits 1590a, but can still be thrown together in a 1590b or 1590n

You could put 2 pedalblocks together in a 1590A. One set as a high pass filter and one as a low pass filter.

 

[Feral Feline]

I guess, after monkeying with the corner freqs extensively.

There was an arguement, ehr… thread … on Talkbass about the differences between regular tone/EQ controls vs HPF & LPF — it was my understandin they’re different enough to warrant a distinction but I don’t know.

I just like building utility boxes and at the other end of the spectrum I like building bleep-bloop robot-fart boxes.

 

[ianmarks]

VFE standout if you can find the unobtanium c10k/c100k dual pots.

 

[Mir9]

VFE standout if you can find the unobtanium c10k/c100k dual pots.

I finished building mine recently and it works well both for tightening up the tone and for the lofi effect. The cuts are very deep, and I can't get those sounds out of other EQs.

I also made the Ibanez Lofi you can get here. I like it in the FX Loop. It always has some filtering you can't dial out, but the Standout is a clean EQ with no added drive. I see some of the dual pots still available on their site. The Focus may be another version of the same basic design, and you can get that project at Madbean.

 

[mdc]

You could start by trying to tack a passive HPF to the input of whatever circuit and LPF to the output and see if you like how that sounds. Just splice them in between the PCB and the switch.

 

[mdc]

 

[Danbieranowski]

Does C1 in this case determine the maximum frequency in one direction or the other?

 

[Danbieranowski]

I found this, which is fun:

Filters - Low Pass and High Pass | Amplified Parts

www.amplifiedparts.com

 

[mdc]

Does C1 in this case determine the maximum frequency in one direction or the other?

The capacitor and the resistor set the corner frequency of the filter; using a pot as a variable resistor allows you to change the value of the resistor, which makes the corner frequency adjustable (as that link you shared makes clear!).

 

[Danbieranowski]

The capacitor and the resistor set the corner frequency of the filter; using a pot as a variable resistor allows you to change the value of the resistor, which makes the corner frequency adjustable (as that link you shared makes clear!).

This is radical!

 

[Big Monk]

This is radical!

You could just use 2 tone block units from PedalPCB set for a passive HPF and LPF.

 

[Danbieranowski]

You could just use 2 tone block units from PedalPCB set for a passive HPF and LPF.

I wasn’t aware that this was possible but I’ll definitely check it out. Thanks!

 

[Big Monk]

I wasn’t aware that this was possible but I’ll definitely check it out. Thanks!

You would just use two of them and leave one side of the BMP control disconnected, i.e. don’t connect a cap and resistor on one side.

 

[Danbieranowski]

You would just use two of them and leave one side of the BMP control disconnected, i.e. don’t connect a cap and resistor on one side.

Yeah that makes sense. Thanks sir!