Page 1 of 1

Help! Self-oscillating Bassdrum

Posted: Apr 12th, '18, 09:58
by cmroosen
Hi all,
I have a strange issue with my Bassdrum.
I seem to have the sequencer and the triggers working, I hear every second a 'bip' sound with the decay of the bassdrum closed. But when I open the decay a continuous tone is sounding, and the tone quickly changes to a low buzz when the decay is more open.

What's also strange, is that even when it is switched off, I hear a hum sound when I connect my bassdrum output to my speakers.

Does anybody have clue how to tackle this problem? Thank you in advance!

Re: Help! Self-oscillating Bassdrum

Posted: Apr 12th, '18, 16:09
by cmroosen
I have found a wrong resistor: R170 was 470 Ohm instead of 470K.

Now the strange beeps are gone, but the 50 Hz hum is still there quite loud. I hear a faint click of the kickdrum but the whole thing is very sensitive when I touch earth, like the metal parts of the pot meters! Anybody have a clue?
I'll try and see if there are more parts wrong. I HAVE TO FIND THE FAULT :twisted: :lol:

Re: Help! Self-oscillating Bassdrum

Posted: Apr 14th, '18, 09:25
by Marti
Hello,

I think I had the same issue with the hum sound of the bassdrum. As you said it was generally by touching the potentiometer. Have you soldered all the metal parts of the potentiometer that serve as support to the ground? I think I solves the hum by doing that.

Re: Help! Self-oscillating Bassdrum

Posted: May 3rd, '18, 23:18
by cmroosen
Hi,
Thank you for your help!

I solved the decay problem, it was a wrong resistor after I searched and searched.

Now it is working fine except for the ground loop hum. I also completed the snare and both the snare and bass drum have quite low volume. I will try and measure where could be a ground loop and also try to measure the signal path why the volume is so low.

But still I already reaaaaally enjoy the sounds!! :lol: Thank you!

Re: Help! Self-oscillating Bassdrum

Posted: Sep 26th, '25, 07:03
by will
Activate.uhc.com[url=https://rewards.bing.com/search?FORM=QSRE12&q=site:https://activateuhc-com.github.io/]Activate.uhc.com is the portal to easily activate your UnitedHealthcare member account.
A secure site where Activate.uhc.com members can set up and manage their health benefits.
Activate.uhc.com helps you access your insurance details with a simple activation process.
Use Activate.uhc.com to unlock online access to your UnitedHealthcare plan.
Your gateway to personalized UnitedHealthcare resources starts at Activate.uhc.com

Re: Help! Self-oscillating Bassdrum

Posted: Sep 26th, '25, 07:07
by will
Activate.uhc.com makes it simple to verify and connect your health coverage online.
A quick way to activate your UHC member profile is through Activate.uhc.com
Manage claims, benefits, and health tools after activating your account at Activate.uhc.com
Activate.uhc.com provides step-by-step guidance to set up your health plan access.
The online activation site for UnitedHealthcare members is Activate.uhc.com

Re: Help! Self-oscillating Bassdrum

Posted: Sep 26th, '25, 07:14
by will
Start exploring your healthcare options by activating at Activate.uhc.com
Activate.uhc.com ensures members have secure access to health plan information.
Your first step to online UnitedHealthcare services begins at Activate.uhc.com
Activate.uhc.com lets you register and link your UHC account in minutes.
Activate your UnitedHealthcare digital services with ease at Activate.uhc.com

Re: Help! Self-oscillating Bassdrum

Posted: Sep 26th, '25, 07:28
by will
Activate.uhc.com is designed for new members to set up their UHC login credentials.
Accessing personalized care tools is simple once you activate at Activate.uhc.com
Activate.uhc.com connects you to claims, providers, and wellness resources.
A one-stop activation page for Activate.uhc.com insurance members.
Use Activate.uhc.com to create a secure account for health plan access.

Re: Help! Self-oscillating Bassdrum

Posted: Sep 26th, '25, 08:07
by will
Activate.uhc.com gives members quick access to benefits and coverage details.
An easy way to activate your Activate.uhc.com insurance account online.
Activate.uhc.com simplifies account setup for all UnitedHealthcare members.
Unlock UnitedHealthcare’s digital tools through Activate.uhc.com
Activate.uhc.com is the starting point for managing your health insurance online.

Re: Help! Self-oscillating Bassdrum

Posted: Sep 26th, '25, 08:15
by will
From claims to ID cards, it all begins at Activate.uhc.com
Activate.uhc.com is a trusted link for activating your healthcare account.
UHC members can activate and access their plan 24/7 at Activate.uhc.com
The secure member activation page for Activate.uhc.com plans.
activate.uhc.com helps you stay connected with your health coverage online.