New Sub Phatty loud popping noise when changing presets

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obstacle66
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Joined: Fri Nov 29, 2019 6:06 pm

New Sub Phatty loud popping noise when changing presets

Post by obstacle66 » Fri Nov 29, 2019 6:12 pm

Hi,

Just got a brand new Sub Phatty, and after I change between some presets, the first note played on new preset emits a loud pop (louder than any note would be otherwise). If I wait 10+ seconds before playing a note, the pop seems to not happen. If I had to guess, I would imagine that a capacitor is discharging somewhere. Is this normal behaviour?

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till
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Location: south-west Germany
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Re: New Sub Phatty loud popping noise when changing presets

Post by till » Sat Nov 30, 2019 6:34 am

This is nothing like this on my SubPhatty.
keep on turning these Moog knobs

Sequence:
Prodigy * minimoog '79 * Voyager * MF102 * MF103 * MF104z * MP201 * Taurus 3 * Minitaur * Sub Phatty * MF105 * Minimoog 2017+ MUSE * One 16

obstacle66
Posts: 2
Joined: Fri Nov 29, 2019 6:06 pm

Re: New Sub Phatty loud popping noise when changing presets

Post by obstacle66 » Sat Nov 30, 2019 3:56 pm

Here is a short video to illustrate the issue:

https://youtu.be/uYB-ELJ5lTQ

It only happens between certain presets. Aside from the preset shown in video, it also happens after factory 4-3 preset. Whether it pops also depends on what preset is next, it doesn't affect all combinations.

Thank you.

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till
Posts: 1182
Joined: Tue Nov 22, 2005 6:17 pm
Location: south-west Germany
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Re: New Sub Phatty loud popping noise when changing presets

Post by till » Sun Dec 01, 2019 6:18 am

Looks like the release section of one of the envelope is not finished when switching the preset. It is normal for an analog envelopes to have a certain latency in changing to the new envelope parameters due to their mainly capacity based design.
But I am not sure if the SubPhatty got analog envelopes or digital created, CV via a D/A sending envelope.
keep on turning these Moog knobs

Sequence:
Prodigy * minimoog '79 * Voyager * MF102 * MF103 * MF104z * MP201 * Taurus 3 * Minitaur * Sub Phatty * MF105 * Minimoog 2017+ MUSE * One 16

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