FR-AV2 problem - clipping noise produced by low level (-20 dB or lower) low frequency sound

[halderen]

Hi, I just noticed that my FR-AV2 produces clearly (loud) clipping noises by low level (-20 dB or less on the inputmeters) low frequency sounds (lower that 20 Hz). These low frequency sounds are produced by my microphones when moving them slowly (without windscreen) - this does not result in normal clipping!!! I adjusted the input gain low to very low to be sure that there is no (normal) clipping taking place. This problem does not occur on a Zoom F6. I tested it with several microphones (eg. Neumann KM184 / AKG C460/CK61 / Pearl MS-8CL). All with the same result.

I am afraid that switching between the two stacked AD-converters (in one input channel to achieve 32 bit dynamic range) is done in a way that it does not handle low frequency (almost DC-signals) well. This seems a major design flaw.

Does anyone have the same kind of experience ??

 

[vlex18]

Ahh, I think I'm having the same issue. I work at a nightclub in Hollywood & it clips on bass heavy songs even though my levels are way below the limit when recording audio from the soundboard. I also have the X8 so i'll compare the two the next time i go back :-/

Input settings:
<<CH 1
Rec Level +8.5dB
Gang: Off
Rec Enable: On
Input: Line
Stereo Link: Off (i'm using a single XLR -> 1/4" to the sound board)
Phantom: Off
Delay: 0ms
Low Cut: Off
Dynamics: Off
EQ: Off
Noise Gate: Off
Phase Invert: Off

Rec Settings:
Rec Format: 48kHz
Bit Depth: 32 bit Float
Rec Pause mode: on
Pre rec: Off
Rec Hold: On

sample clipping audio