For the sake of future searches for this thread, "clipping" is a better keyword than is "over-range".
And I finally realized that the distortion associated with the clipping which I am experiencing is very much like sibilance or the distortion produced by a kazoo. %%% I searched for discussions of "digital recording clipping repair". I found that some people have had limited success with digital repair techniques if the clipping is less than a few dB (dB = deciBel) -- say 1 dB to 3 dB. But if the clipping is in the neighbourhood of 6 dB or higher, then the consensus appears to be that repair by digital editing is all but impossible. Audacity has a "repair" tool which, with each application, is able to repair a single -- and very short -- instance of clipping. Using Audacity, I used the "amplify" effect with a gain of -3.0 dB, which produced a maximum level of -3 dB in my audiobook files. But for the several hundred 3-minute tracks of an audiobook, the capability of command-line batch processing (sox ?) clearly is a necessity. %%% Regrettably, most discussions regarding repair of clipping damage ignore the possibility of effecting the repair via analogue processing. A technique which I think should be effective is to pass the analogue signal through a high-quality de-esser such as can be found on some studio-grade (analogue) vocal strips such as those produced by Rane and by Aphex. Simple low-pass analogue filtering (using a graphic equalizer or a parametric equalizer) also should be effective. However, a high-quality de-esser is to be preferred, inasmuch as -- if it is adjusted properly -- it comes into play only when sibilance is present. RLH -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20130307083539.gb3...@gospelbroadcasting.org
