Noise/hissing/popping sound

[Maudette]

Hello, I bought a LR Baggs Voiceprint DI a few months back and I can't figure out how to fix the high pitch hissing noise when plugged Into an audio interface (apollo) or an effects processor (helix/quad cortex). The voiceprint has no issues when not used with any of these other devices. Unfortunately I'm unable to record or use it live with my Quad Cortex because the hissing sound is unbearable. I've tried some of the " half fixes" in a couple of the other forum topics but nothing works for me.

Hoping someone here can help me,

Thanks!

[Caleb_Elling]

Hey Maudette,
Thanks for posting.

When you're using the DI with your recording interface, are you using the original power supply? Most noise I've seen with the VPDI comes from underpowering or sharing power with other devices.

Out of curiosity, if you plug one output of the DI into your interface and the other output into an amp, do you get the same noise? I'm wondering if it could be a grounding issue.

Let me know what you can and I will see what I can do to help.

[Maudette]

Hey Caleb! Thanks for the reply, I'm using the Strymon Zuma power supply to power the voiceprint. I will try using the original power supply when I get home and get back to you.

I'm thinking it's not the power supply because when I use the voiceprint ( powered by the Strymon Zuma ) and plug into the fishman loud box/or a regular speaker it sounds amazing.

As soon as I go Voiceprint > Interface > amp/speaker I get the hissing noise, the noise doesn't stop when you mute the voiceprint either, it changes to a really high pitch squeal. The only way the noise stops is if you press both buttons and bypass it.

[Caleb_Elling]

OK,
The Zuma should work just fine with the VPDI.

The only thing I can think to try is to connect the other output from the pedal into another piece of gear that has a solid connection to ground, like an amp or mixer. The interface you have has its own power supply, which should give it a good path to ground.

This really isn't making sense. I feel like I'm missing something.

[Maudette]

Okay, I've been messing around with it all night and this is what I've come up with.

1. Guitar into Voiceprint XLR out into fishman loudbox performer - squealing noise and a constant pop..pop..pop..pop.

2. Guitar into voiceprint quarter inch out into fishman amp - squealing noise and popping

3. Guitar into voiceprint XLR out into a Yamaha HS5 - no no hiss with faint popping.

4. Guitar into voiceprint quarter inch out into Yamaha HS5 - light squealing with light popping sound

5. Plugging the quarter inch cable into the loudbox and the XLR out into the Yamaha HS5 makes everything much worse.

6. Using the factory supplied power supply changes nothing in all scenario's

7. Using other guitars changes nothing in all scenarios.

8. I've tried different outlets all around the house.

[Maudette]

Is there an email I can send a voice clip recording to?

[Caleb_Elling]

[QUOTE=Maudette;n10774]Is there an email I can send a voice clip recording to?

[/QUOTE]

If you have an audio sample of the noise, I'd love to hear it. I'm at [email][email protected][/email].

This is a very unique situation. Thanks for running all of those tests!

[Maudette]

Email sent!

[ammaclean]

Are you using a Loudbox? If so, do you get the high pitched noise when turning on the LB bluetooth?

[ammaclean]

[USER="212"]Caleb_Elling[/USER]
This is the same problem I was talking about...
[url]https://forum.lrbaggs.com/forum/voiceprint-community/setup-connecting/10327-bluetooth-noise[/url]


My pop pop pop is almost indistinct when powered straight from a GigRig distributor, but there along with high pitch when powered with isolated 500ma GigRig power (weird!). GigRig and Stymon should not underpower the VPDI. I also tried a GigRig NCF (high freq noise cancelling power) and the high pitch is still there.

I'm really convinced this is a Bluetooth always on problem and if you provide a feature to turn off BT it will solve it, but what do I know ;)

[Caleb_Elling]

I just looked up the GigRig because I wasn't familiar with it. The website says that the Distributor is a non-isolated power supply, which would explain why you're getting that high-pitched noise when sharing power. You need isolated power, as well as 500mA of current. Since the noise is cause by shared power or low power, a noise filter like the NCF wouldn't change anything.

[ammaclean]

[URL="https://forum.lrbaggs.com/core/"]Caleb_Elling[/URL] I must not have been clear:

1) indistinct when powered straight from a GigRig distributor
2) still there (i.e., pop pop pop) along with high pitch when powered with ISOLATED 500ma GigRig power

Note: when all other pedals are isolated and VPDI is not using an isolated supply it IS isolated. So, only one pedal straight from distributor is isolated when all others are isolate.

So, isolated power supply actually makes it worse and NCF makes it no better. In other words, the high pitch is not coming through power AND it does not come through the audio cables (see [USER="14742"]Maudette[/USER] tests above, many of which I have done as well). The pop pop pop and high pitch is an internal noise. To be clear, that does not mean it is internally generated, but something internally susceptible to noise (yet not coming from power or audio cables), making radio frequency a likely culprit.

[Caleb_Elling]

The issue described by Maudette ended up being related to a low-output, passive Vioin pickup that needed a lot of additional signal level. We were able to get around the noise by using another pedal in front of the VPDI to raise the signal level and lower the impedance before the VP processing. That made a huge difference for that pickup, and allowed it to be used with little to no noise, even in in-ear monitors.

What pickup(s) are you using?

[Ferg1]

[QUOTE=Caleb_Elling;n10840]I just looked up the GigRig because I wasn't familiar with it. The website says that the Distributor is a non-isolated power supply, which would explain why you're getting that high-pitched noise when sharing power. You need isolated power, as well as 500mA of current. Since the noise is cause by shared power or low power, a noise filter like the NCF wouldn't change anything. [/QUOTE]

I've been having similar issues with my Gigrig generator power supply.

My rig is pretty simple, an Old blood noise endeavours signal blender to switch between three guitars in different tunings, then into a Sonic research ST300 (which is also the main mute ) then into the VPDI I am using a Strymon Timeline (with Gigrig Timelord power) and a Strymon Flint through the VPDI effects loop. My current workaround for the noise is to use the VPDI power supply and that works well but is a bit cumbersome.
Joe from the Gigrig says that a Gigrig Timelord will address the issue with the VPDI, I have used Gigrig for the last 15 years or so and their power supplies have proved themselves to very reliable. I will give it a try this weekend as I can borrow a Timelord from my main electric peddle board.

I am very happy with the VPDI, as it is working well with a variety of different types of guitars and pickups, this setup allows for fast guitar changes mid set without sacrificing the sonic value of the guitars.

cheers :-)

[Caleb_Elling]

Thanks for trying that out, Ferg1. Let us know how it goes.

I just got the TrueTone CS6 Pro, and it works great with the VPDI and other pedals at the same time.