LMNC Bandpass Filter

Good practice is 100 nF close to the chips, plus 10 uF usually close to the power inlet.

3 Likes

Thanks. This is what I like about this forum.
Patient answers to questions on the basic stuff.

2 Likes

This is an old post but… in case anyone wonders why guitarists prefer true bypass using a DPDT (or 3PDT if you want an indicator LED at the same time) switch is signal loss. The alternative to true bypass is “buffered bypass” where switching is done via a momentary switch and a switching transistor network. This is what Boss pedals (for decades, the largest pedal company and an industry standard) implement since the late 1970s.

Putting the audio through that buffer, even when the pedal is switched off, results in signal loss. Not really a problem with a couple of pedals in series, but since it’s not unusual for guitarists to run 5, 10, or 15 pedals in series, the signal loss can be considerable. Hence, pretty much everyone except Boss (and their numerous clones, of course) uses true bypass switching (also much easier to implement as a DIY as well).

This debate is not really relevant in the synth world since synthesizers do not typically use switches to turn modules on and off.

2 Likes