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Author Topic: mystery volume fade (M10, UBB, CA-14 mics)  (Read 2404 times)

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Offline Charlie Miller

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Re: mystery volume fade (M10, UBB, CA-14 mics)
« Reply #15 on: December 28, 2017, 06:23:01 AM »
Absolutely sounds like it’s losing power. I had that happen with an AKG recently. Does the quality change or is it just volume?

Just volume. If I amplify it in post it sounds seamless, though the noise floor rises.

With your AKG, did it lose power in just one channel at a time? That's the behavior that's puzzling me.

It was just one mic on my end. May be a bad capsule.
Audio Engineer - Steve Kimock Productions


Schoeps CMC6/MK4 & AKG C460b/CK8
Lunatec V2  > Sound Devices 744T

Offline nulldogmas

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Re: mystery volume fade (M10, UBB, CA-14 mics)
« Reply #16 on: December 28, 2017, 10:41:24 AM »
It was just one mic on my end. May be a bad capsule.

Except then for me the other channel faded to match a couple of recording hours later, so it's not just affecting one mic.

I kind of want this to happen again so I can get more data, but I also don't want it to mess up another recording...

Offline Charlie Miller

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Re: mystery volume fade (M10, UBB, CA-14 mics)
« Reply #17 on: December 28, 2017, 11:08:28 AM »
It was just one mic on my end. May be a bad capsule.

Except then for me the other channel faded to match a couple of recording hours later, so it's not just affecting one mic.

I kind of want this to happen again so I can get more data, but I also don't want it to mess up another recording...

Both mics? Gotta be a power issue. Something is draining the power
Audio Engineer - Steve Kimock Productions


Schoeps CMC6/MK4 & AKG C460b/CK8
Lunatec V2  > Sound Devices 744T

Offline nulldogmas

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Re: mystery volume fade (M10, UBB, CA-14 mics)
« Reply #18 on: December 28, 2017, 02:29:13 PM »
Both mics? Gotta be a power issue. Something is draining the power

Both mics, but one then the other, not both at the same time.

Offline icebox

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Re: mystery volume fade (M10, UBB, CA-14 mics)
« Reply #19 on: December 29, 2017, 07:25:26 AM »
No problems last night with a different recorder, but then, the last time this happened there were no problems the next night without changing recorders.

Anyone ever had something like this happen to them? Or know enough about electronics to theorize which link in the chain is most likely the culprit?
I've had this happen to me, with a CA9200 feeding CA-14s to an M-10, but the cause was a dying battery in the CA9200.  replacing the battery fixed the problem.  The first time it happened, it recorded a 30 min opener, then 70 minute main set, then faded out gradually during the first song of a 3 song encore, and couldn't figure out why.  Testing the unit after the show it seemed to be working fine again, but next time out, 2 openers recorded fine, then main set the last three songs lost because of the same issue.  My notes from that day show that I deduced it was a preamp issue, and changing the preamp battery before the next show fixed the problem.  With me the problem was both mics at the same time. 

 

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