Hi,
I’m trying to use MR click to remove some static-sounding crackling from a recording. I think the source of the crackle is a mic that was overloaded—there is some over-recording in parts too. The music source was a VERY loud concert in a club, and recorded to a Panasonic DVX100B camcorder. This machine has very good recording for a camcorder, but I think in this case the mics were overpowered. I didn’t mic separately because of the tight venue (just being an audience member, albeit with one band’s permission to record.)
In any case, the sound problem being a crackle, I figured MR click might be able to help.
MR Click does identify the click and crackle, and can reduce it significantly. However, I’m finding that in its place it generates a low rumbling which is just as if not even more annoying. The rumble seems to be a function of the click phase (crackle on or off doesn’t affect it), and in particular the duration. At threshold of 5db and duration of 0.75 ms the rumble is minimized and detection maximized, but still very annoying (especially with headphones.) As the duration is increased the rumble does too. (Threshold decrease increases rumble, but that is expected because more clicks are detected.)
My understanding of click and crackle suppression is meager, but I’m suspecting the rumble is an artifact of the interpolation which is supposed to mask over the spike. Perhaps this music, from a punk / rock band, with constant percussion, cymbal, guitar, wailing lyrics—wall of sound stuff— makes it difficult to create an interpolated signal that sounds good
In the end I used a simple graphic eq to diminish the highest frequencies where the crackling lives.
Any advice, pointers, or real analysis welcome!
Thanks,
Erik.