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Author Topic: Bass Dropouts  (Read 324 times)

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Offline Belexes

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Bass Dropouts
« on: December 10, 2020, 08:50:25 PM »
A friend is remastering a recording for another taper and he states:

Here is a strange one. I am remastering a show from a taper well known to me. I have remastered many of his shows and never run into this particular issue before. During a 1 hour recording there are 5 brief periods lasting 15-20 seconds each, during which a substantial part of the bass drops out of the recording. Analysis shows that this is mostly in the 200-300Hz range but the drop extends up to 400Hz. Interestingly the sub-bass below 150Hz is unchanged. This drop in bass makes the recording sound like a 1970's telephone call. I have attached a 30 second MP3 sample. The first 5 second and the last 10 seconds are "normal" with the middle the result of this dropout. Here is his gear: OKM2mics > Zoom H2n (at WAV 16/44) > SDcard > HD.

Any ideas as to the cause?
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CA-14 (c,o)/MM-HLSC-1 (4.7k mod)/AT853(4.7k mod)(c,o,h,sc)/CAFS (o)/CA-1 (o) > CA-9100 (V. 4.1)/CA-9200/CA-UBB > Sony PCM-D50/Sony PCM-M10

Offline Gutbucket

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Re: Bass Dropouts
« Reply #1 on: December 11, 2020, 11:03:12 AM »
I strongly suspect it's the doings of the sound guy behind the board
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Offline Belexes

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Re: Bass Dropouts
« Reply #2 on: December 11, 2020, 08:00:47 PM »
I am now hearing that it was blazing hot the day of the taping - so possible power issues.
Busman Audio BSC1-K1/K2/K3/K4 > HiHo Silver XLR's > Deck TBD

CA-14 (c,o)/MM-HLSC-1 (4.7k mod)/AT853(4.7k mod)(c,o,h,sc)/CAFS (o)/CA-1 (o) > CA-9100 (V. 4.1)/CA-9200/CA-UBB > Sony PCM-D50/Sony PCM-M10

Offline jerryfreak

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Re: Bass Dropouts
« Reply #3 on: December 11, 2020, 09:29:01 PM »
perhaps some of the amps were overheating and thermal protection kicked in
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