5 Reasons Your Pedal Pops

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@WillyRaschke 2 жыл бұрын

A boost pedal I have had for some time, began popping recently. This will help me diagnose. board order had just been re-done and at first there was no noise.

@EDGARDOUX1701 4 жыл бұрын

Love technical explanations! Keep going and have a very good 2021

@GeorgeGeorge-xj2bc Жыл бұрын

Recently i finished a big muff pedal project.True bypass foot switch with 9 pins wasn't available and shipping time was enough to come so i used CD4066 chip with a single on/off push switch obtaining excellent results.Nothing is audible when gates are opening or closing in a four stages overgain distortion pedal.Also input and output capacitors must "see" a large resistor around 1Meg exactly for the same reason,click or pop.

@walterockmx 4 ай бұрын

Thank you! Please continue uploading content, I Love this kind of educational -tech -lessons videos

@HayBeseret 4 жыл бұрын

Amazing - I did not even knew how to call that .. and was suffering from it on my very first project. Thanks !

@thomasseaton8320 4 жыл бұрын

Had this problem today. Stuff like this makes me irrationally depressed. Thanks for the information.

@stingrey222 4 жыл бұрын

Nice explanation. Can you talk about how to select input/output resistor values? I see 1M a lot, but also higher and lower values occasionally. What are potential downsides? (Volume loss, hi:low pass effects). Is there a reason we don’t see these in every circuit? Thanks!

@erikvincent5846 4 жыл бұрын

1M is typical. If you go lower, it allows for a faster bleed off, which is good, but also drops the input volume by bleeding the actual input signal to ground as well. You can go higher for resistor values, which also aids in signal impedance, but then it can't bleed off the voltage leaks at any rate that's worth anything. That's the balance.

@famitory 4 жыл бұрын

there are 3. considerations: 1. filtering effects, found using the value of the input/output caps and a basic butterworth filter curve calculation. in this case, it's a high pass filter. 2. input/output impedance of the circuit and what will be feeding it. a direct guitar can be anywhere from 5kohms to 500kohms depending on the pickups (piezos with no preamp are especially high impedance), but another pedal's output will usually be in the 10s or 100s of ohms.generally you want to keep input impedances high and output impedances low, and an input bleeder resistor will eat more of the incoming signal 3. other. some circuits have special considerations that may require a different approach

@markhammer643 Жыл бұрын

There is a phenomenon I like to call "pedal ventriloquism". We've likely all seen acts where someone operates a dummy on their lap, and though they are the one doing all the talking, it *sounds* and *looks* like the dummy is talking. Pedals that use electronic FET-based switching (and Boss is a textbook example of E-switching) employ input and output buffers, with the switching circuitry *inside* that "shell". The switching circuitry has no impact on the input and output of the pedal, just the effect-producing portion of the circuit board. To keep input noise at a minimum, as well as reduce the loading effect of having multiple pedals in series, there is generally NO terminating resistor on their input buffer, such that the first capacitor is left "hanging", just like the first circuit diagram in this video. On its own, that poses no issue, since the switching is done *after* that point in the circuit. You get a brief thump when you first plug in and power is connected, but thereafter one can hit bypass a thousand times and experience no switch-popping. It's not bad design in any sense, but also did not anticipate use with other sorts of pedal switching. What happens if one combines such pedals with "true bypass" pedals? Remember that TB pedals briefly disconnect and then reconnect the signal. When such a pedal is placed before an E-switched pedal, that "hanging" capacitor on the E-switched unit is briefly disconnected and reconnected by the true bypass pedal's stompswitch. Use either of these pedals on their own, and they are pleasingly quiet. Used in the order of TB->E-switched, and you'll often experience popping when you step on the TB pedal. I call it "pedal ventriloquism" because while it may *look* like the TB pedal is popping, it is actually the *E-switched pedal* that is producing the pop as its input capacitor gets disconnected and reconnected. Thankfully, there is a simple cure. Just solder in a 1M-2M2 resistor between the input lug and ground of the "in" jack on the E-switched pedal, such that its input capacitor always has a way to drain off any stored charge. The impact on the E-switched pedal's sound will be negligible (unless you have a dozen of them in series with the same fix), but the TB pedal ahead of it will be blissfully "pop-free" when switching. And remember that if pedals A and B are true bypass and pedal C is E-switched, stepping on *either* A or B would elicit popping from C, in the absence of the suggested fix. That "hanging capacitor" doesn't really care where its momentary disconnection/reconnection is occurring. Small wonder that popping in such "mixed" pedalboards can befuddle players.

@maxammo6282 6 ай бұрын

Do you need to get a pet you're leaving way too long of a comment on a simple KZbin video. For real dude get some help.

@markhammer643 6 ай бұрын

@@maxammo6282 1) I like people to *understand* things, not just parrot. Sometimes that requires a longer explanation. If you don't feel like doing "the required reading", don't expect to pass the course. 2) I don't own, or particularly like, mobile phones. It's remarkable how much they encourage people to be curt and impatient; a price we pay as a society. TLDR will be the death of civilization. An actual keyboard offers me the latitude to be articulate AND edit. 3) I do have a pet - a wild rabbit we adopted, who lives in the house with us, free range. But I also have a big pile of pedals to repair, and synth modules to finish up.

@maxammo6282 6 ай бұрын

@@markhammer643 🙄

@hadleymanmusic 4 жыл бұрын

Is there a fet switch circuit pre made for my diy pedal circuit?

@erikvincent5846 4 жыл бұрын

Unfortunately that would be tricky. JFET switching requires the actual pedal effect and switch to be modified to do this. The JFETs and supporting circuits are integrated into the effect PCB, and then an SR latch circuit trips the JFETs on and off via a switch.

@hadleymanmusic 4 жыл бұрын

@@erikvincent5846 ok .

@DavidMsg 4 жыл бұрын

This is great! I was breadboarding some clipping diodes (hard clipping), and get a pop when switching them on/off. Assume its from the voltage spike when they are switched off? Wondering how to remedy that.

@erikvincent5846 4 жыл бұрын

Did you have input and output capacitors on either side of your clipping diodes?

@DavidMsg 4 жыл бұрын

@@erikvincent5846 probably not! Will build again and test. Is there a suggested value that won't affect tone?

@erikvincent5846 4 жыл бұрын

@@DavidMsg input cap? 100nF or larger will let in more bass to the point of only cutting out sub bass frequencies. Output cap? Probably 10uF or larger would be good.

@DavidMsg 4 жыл бұрын

@@erikvincent5846 Awesome, thank you Erik!

@rodsmoth8669 7 ай бұрын

This was very helpful thank you

@catface101 Жыл бұрын

Are pulldown resistors still necessary with modern 3PDT footswitches?

@RobMods 4 жыл бұрын

Excellent video!

@andymalcolmson614 4 жыл бұрын

ive got a little question actually! its not in regards to popping but more i momentary sound cut off. i modded a boss blues driver. sounds fine but when i engage or disengage the pedal, i get the quick momentary sound cut off. it doesnt gradually come back up in volume and theres no pop. just not a smooth clean on off sound. so its noticable when its engaged or disengaged. any ideas?

@erikvincent5846 4 жыл бұрын

Not exactly sure, but BOSS pedals use JFETs for switching, and it might be those JFETs that is the source of your situation.

@carljemuel Жыл бұрын

How about when it fades in when engaged?

@crisjohnalvarez6036 3 жыл бұрын

Does pop or popping sound can damage, your pedals? Or amp??

@erikvincent5846 3 жыл бұрын

Typically, no, but there are some scenarios that issues could damage an IC. If you look at the Angry Orange explained, I do show were a diode is used to protect the opamp from a voltage swing, which can come from a pop, among other things.

@crisjohnalvarez6036 3 жыл бұрын

@@erikvincent5846 ic of the amp??

@erikvincent5846 3 жыл бұрын

@@crisjohnalvarez6036 IC of the pedal, but theoretically, of an opamp stage of an amplifier too. However, if you properly design it, you should have an in series resistor, somewhere between 1K and 10K to reduce that from being a problem. Diodes can also be found in amplifiers that are there for protection.

@crisjohnalvarez6036 3 жыл бұрын

@@erikvincent5846 to me case on my pedalboard, does not pop sound anymore. due to my pure buffer pedal. when in the first chain, I removed the pure buffer and my rig no longer pops. and when the pure buffer I put in the last of the chain also did not pop.

@BarbarianKingCoC121 2 жыл бұрын

I got a new delay pedal fresh out of the box and once I turn it on with everything plugged in it makes a repeating popping sound. Like not just once it does it over and over again until I turn it off it does it about every 1 sec. It’s a 9v and the cable I have is 12v. Does anyone have a clue to what it is or how to fix it?

@GeorgeGeorge-xj2bc Жыл бұрын

Switching power supplies are making noise when used for pedals that is audible and very annoying because there is a huge gain factor in the pedal boards.