I have a pedalboard noise issue and I have troubleshooted everything!!!!

Discussion in 'Effects [BG]' started by mr80htz, Jul 23, 2021.

  1. mr80htz


    May 15, 2018
    OK, just as the title implies

    The Noise: Sounds like a noise floor issue/background noise of an idle high gain amp. Not noticeable at lower volumes but what the amp gets from 4-5 the noise is much louder as the pre amp gain increases.

    Not a ground loop hum. I tested that out and nothing changed the background/high gainey noise.

    The Pedals:
    12 in total. 8 are True Bypass, 4 and Buffered. The last pedal, a EH 1440 looper has a 350ishk output impedance buffer. Lowish but it is not at an ideal 200-100k output. XVive Memory Delay, BOSS PH-1 Phaser, and Nunaber Immerse V1 are the others.

    In and out jack on the board are good/high quality (The board if from Blackbird so whatever brand they use).

    What have I done to try to solve the issue:
    1. Removed every pedal from the chain and did tests with and without the pedal.
    2. Started from adding one pedal at time from the end of the chain and then again from the beginning. There is a continuous increase of this nose as pedals are added. Not a lot individually but the noise at 7 peals in is about half the volume after the full 12 pedals.
    3. All cables are soldered Mogami 2319 (high quality) and HOSA pancake connectors

    The Power: 1SPOT CS12 - Great quality supply. All power cables and soldered by me and made of good quality parts.
    All pedals are each using a isolated power source
    1. I removed all the power plugs one at a time with before and after testing. Did nothing for the noise issue.
    2. All isolated power outputs are used (the AC plug is not used)
    3. One outlet is powering a GigRig Isolator with 3 pedals being powered by it.
    3. 2 of the power outlets on the 1Spot have a voltage doubler power chord attached.

    Buffers: I have 4 buffered pedals and do not have a buffer at the beginning and end of my chain

    1. I removed each buffered pedal independently and all together and this didn't change the noise board.
    2. I added a high quality buffer at the beginning of my chain. Nothing changed
    2. I added a high quality buffer to the end of the chain. Nothing
    3. I added high quality buffers to the beginning and end of my chain (sandwiched) Nothing changed the noise.

    1. Mogami 2319
    2. 8-9ft of cable length on the pedalboard in total
    3. I changed each cable and did a before and after test. Nothing

    I changed amps. This is present through both my tube amps. Used the same speaker with both amps.

    It doesn't seem to be any one pedal.
    It doesn't seem to be about the power source and power cables.
    It doesn't seem to be about the audio cables.

    What gives?
    Last edited: Jul 23, 2021
  2. Spectre1966

    Spectre1966 Striving For Mediocrity Supporting Member

    Jul 4, 2014
    Wallingford, CT
    I’m no expert but with the 8 pedals I use I find I get a small amount of white noise at higher volumes as well.
    It seems to me that by nature when you are adding these devices to a hot audio signal you are going to always get some degree of noise, whether very small or noticeable, depending on the pedal and what it does. As you compound them, some amplify the signal and add to it, making it worse, and this probably gets worse as you add more and more pedals.

    I’m used to the small bit of white noise. You can’t hear it in a live setting but in the past I used a noise gate (Boss NS-2) to clean up the signal for me. You might want to consider adding a noise gate pedal to your signal chain if you want to cut the noise down.
    agedhorse likes this.
  3. mr80htz


    May 15, 2018
    I get what you are saying and it makes sense. I like the noise gate idea. Thanks for the response :)
  4. Lowendchamp


    Jun 27, 2021
    Shelton WA
    Did you try not using pedals?
    amper likes this.
  5. mr80htz


    May 15, 2018
  6. sean_on_bass


    Dec 29, 2005
    He is saying it might be your bass :)
    Lowendchamp likes this.
  7. mr80htz


    May 15, 2018
    The instrument is quiet when plugged straight into the amp but has noise with the pedalboard in the signal chain.
  8. Crater


    Oct 12, 2011
    Dallas, TX area
    I suspect that the TrueTone power supply uses switching voltage regulators instead of the older, less efficient, heat generating linear voltage regulators. And some of these modern power supplies also use an HF oscillator so the transformer(s) can be smaller, lighter and cheaper. Note the "FCC disclaimer" on the bottom your your unit - it means it generates and radiates high-frequency interference. It says RIGHT ON THE UNIT that it may cause interference.

    You might try a power supply that uses a line-frequency transformer and linear regulators, like a Voodoo Labs unit. They cost more for a reason. They don't have an FCC label on them because they don't radiate RFI.

    This is a very common complaint with the OneSpot power supply: they work fine until someone adds that sixth or seventh pedal, then all of sudden they're getting white noise (hiss) or a high-pitched digital whine through their pedalboard. I believe this is due to the switching power supply technology these units use. I have no way of knowing if the noise is coming in via the DC power supply leads, or (more likely, IMO) if your pedals are just picking up the radiated RFI from being in close proximity to the power supply.
    mdalamond and Jek Porkins like this.
  9. revd

    revd Guest

    Apr 11, 2020
    Is it? I (literally) hadn't heard that, my own CS6 is flawless with 7, touch wood for when I add #8 * whistles and does a lucky jig*
  10. mr80htz


    May 15, 2018
    Thank you for the reply. I will check out what you said. I know that Vertex uses them in their pro builds and I wonder why that guy would use them if this was a common complaint? There's no direct affiliation between the two from what I can gather
  11. cosmicevan

    cosmicevan ¯\_(ツ)_/¯ Inactive Supporting Member

    Why not just get an LPF and zap that noise and move on?
    Greg75 likes this.
  12. mr80htz


    May 15, 2018
    I have not heard that a LPF can remove noise. How does that work?
  13. smeet

    smeet Gold Supporting Member

    Nov 27, 2006
    Woodland Hills, CA
    It works by removing the high frequencies, not just in the noise, but from the whole signal. It still leaves the lower frequency noise, but we are not so sensitive to it. Unless you like a muted/dull sound I wouldn’t do that.
    DosiYanarchy and cosmicevan like this.
  14. mr80htz


    May 15, 2018
    Would you received mend a LPF or a noise gate?
  15. smeet

    smeet Gold Supporting Member

    Nov 27, 2006
    Woodland Hills, CA
    Obviously you’d rather not introduce the noise in the first place, so start with doing that as well as you can. After that if you still need noise reduction:
    If your noise is audible while you are playing, and you don’t mind losing some highs, an LPF (which is just a single band of high shelving eq) will be more natural sounding. On the other hand, if you have noise problems only when you are not playing, then a noise gate will work better, although the gate opening and closing can sound a bit unnatural sometimes.
    spatters likes this.
  16. cosmicevan

    cosmicevan ¯\_(ツ)_/¯ Inactive Supporting Member

    smeet hit it on the head. I have used an LPF with great success to tame a hum or hiss in my chain at times.
  17. mr80htz


    May 15, 2018
    ok, cool. I guess I could just try to make up some of the lost higher frequencies on the amp to compensate. Generally speaking, do you need to crank the filter to reduce the noise or just a small turn of the know...and yeah I understand that it depends of the noise level...just a generalized question. I use a passive amp attenuator on a '72 Traynor YBA-1 which cuts highs as you attenuate more and I can generally compensate for lost frequencies with the amp eq. Reverb, here comes a curious customer yet again!
  18. cosmicevan

    cosmicevan ¯\_(ツ)_/¯ Inactive Supporting Member

    It really depends on the noise you are trying to deal with it. At times I've dug into pulling everything apart, but sometimes combinations of things or proximity to power can cause a slight hum that a simple LPF can tame. You don't want to be cutting too much as you don't want to drastically affect the harmonics of your sound, but if it's a high pitched noise artifact, the LPF will snip it right off. You just set it fully open and slowly dial back the frequency until you have it where you want it using your ears as your guide.
  19. amper


    Dec 4, 2002
    Found the problem. You have too many pedals. This is the expected result.
  20. nendo


    Apr 27, 2007
    With having that many pedals in a row, it's no surprise you're getting a lot of noise.

    If you need all those pedals on the board, I suggest getting a pedal switching system. That way instead of your signal going through 12 pedals at the time, it ensures your signal is only ever going through the pedals that you activate.
    amper likes this.