Problems with Erbe-Verb: Humming and High-Pitched Noise

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Herr Rausch
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Problems with Erbe-Verb: Humming and High-Pitched Noise

Post by Herr Rausch » Sat Sep 07, 2019 6:42 am

Hello folks,

I've bought an Erbe-verb from ebay and experience two problems with it. Maybe some people have the same issues and can help me with that.

Firstly, it introduces quite a loud mid-frequency humming noise (nothing patched). It goes away as I unplug a few other modules, especially my 4ms wav recorder. I thought the problem here might be that everything together is too power hungry. But my Doepfer A-100 DIY PSU provides up to 1200 mA + 12V, 1200 mA -12V and the overall power consumption is 1176 mA +12V, 750mA -12V. So the power consumption is still below the possible maximum. Could it still be a power problem?

Secondly, the module makes this annoying really high-pitched noise, which sometimes different electronic devices, like power chargers oder cheap Behringer Mixers make. Is that the case with every Erbe-verb, or is it just mine? And can something be one about it?

Thanks a lot :help:

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macs4music
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Post by macs4music » Sat Sep 07, 2019 6:51 am

The latest firmware helped with the noise floor: http://www.makenoisemusic.com/modules/erbe-verb

Neil
Started with an Atari 1040STe, at least the timing was good....

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lohacker
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Post by lohacker » Sat Sep 07, 2019 6:58 am

Can't help with your problem but a safe limit for power consumption is around 80% of your PSU specs. Try removing some digital or power hungry modules to see if this noise disappears.

Herr Rausch
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Post by Herr Rausch » Sat Sep 07, 2019 10:51 am

lohacker wrote:Can't help with your problem but a safe limit for power consumption is around 80% of your PSU specs. Try removing some digital or power hungry modules to see if this noise disappears.
thanks, so I guess I have to get a more powerful psu

Herr Rausch
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Post by Herr Rausch » Sat Sep 07, 2019 10:55 am

macs4music wrote:The latest firmware helped with the noise floor: http://www.makenoisemusic.com/modules/erbe-verb

Neil
thanks, I did that and it helps with the noise floor audiowise. but the high-frequency whine stays there. I think it's the same thing some other (cheaper) electronic devices do as said. I'm wondering if that's normal and maybe some or most people don't hear it because the frequency is so high, or if my unit is faulty

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macs4music
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Post by macs4music » Sat Sep 07, 2019 1:08 pm

Hmm I hear a whine from my Morphagene so it probably is digital in nature. I tune it out.
Started with an Atari 1040STe, at least the timing was good....

Herr Rausch
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Post by Herr Rausch » Sun Sep 08, 2019 11:05 am

thanks for your opinions. I can't get rid of it and it's just too annoying. Gonna send it back :despair:
cheers

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PompeiiRuler
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Post by PompeiiRuler » Mon Sep 09, 2019 7:19 pm

Had the same issues a while back and somehow able to rectify it.
Update the firmware for a starter.
I moved it around cases, changed modules around it and removed modules until the noise and hum vanished. It seems it really doesn't like a power supply >80% capacity.
I sometimes now have the same issues of hum and clock noise with the morphogene but that's for a different thread.

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hinterlands303
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Post by hinterlands303 » Mon Sep 09, 2019 11:06 pm

Definitely try moving it around in the case if you haven't already (or to another case if you've got one). I've had problems caused by troublesome (usually digital) modules which have caused high pitched noises in otherwise well behaved modules. Also as said I would never go higher than 80% of recommended power - some manufacturers aren't accurate with their power specs.

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