![]() ![]() The apparent response to audio up that far is a result of inaccuracies, noise and pure guesswork. The pure Nyquist limit of 44100 samples is 17KHz audio, not as it is sometimes assumed 20 KHz or higher. It is possible under certain circumstances to get red clipping bars with no sound distortion. ![]() We admit that the clipping indication tools are not perfect. We have never advocated doing any sound work so close to the zero point that this effect occurs. This is because compression techniques cause distortion. It’s certainly possible to have sound values at or near 0dB and create distortion or clipping in the final show – assuming you insisted on using MP3 or other compressed medium. The blue waves in Audacity are a convenience created by Audacity for the benefit of the humans. Maybe this was discussed before and was omitted but maybe it will be taken into consideration for a future release. I’ve looked into this forum and the Wiki but I didn’t find any hint that such a feature was discussed before. With the current display there is no way to detect such a clipping in the waveform. When editing samples close to 0dbfs it is possible that the resulting waveform is clipping even when all the sample are below 0dbfs. Another issue is intersample clipping (I don’t know if it is the right term for this). In some cases it is necessary to do some manual editing to my recordings from vinyl and with the current display sometimes I only get a coarse approximation of what the waveform really looks like, especially when the edits are near the nyquist frequency. Currently Audacity generates the waveform-display by just connecting the dots from the individual samples. The one thing I’d like to see in Audacity is a display of the true waveform. Many Thanks for this to all the developers. First I’d like to say I’m using Audacity for many years now, mainly for recording my vinyl and I’m very happy with it. ![]()
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