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Tim Gillett wrote:> My guess is the lassoo technique can > work with a simple patterned noise such as the audience member whistle ..snip.. > but not so sure it would work on swish or hiss which is essentially random To find out, you need to try it yourself. I have done it (seen no T-shirt, though) and got some of the distraction of the swishes reduced. Did it for a shortish period in the beginning of one song and my customer was happy with the result. As you point out, it is more difficult to define the area to be attenuated in a noise-type swish than it is with a tonal distracting sound. A whistle sound appears rather sharp edged in the spectrogram and often you can use even the RX Magic Wand selection tool for that. In a record swish the frequency content and the gain change smoothly and it doesn't have any sharp borders. That's why you need to advance with small moves, like an archaelogist with a soft brush. You draw kind of "height curves" with the lasso tool around what seems to be the most distracting area at the moment. It takes time and you need to be patient. I guess that such an algorithm wouldn't be impossible for the developers to build, they have done more complex things, but it is possible that the demand for swish detection in a restauration program is not large enough, so that they would start developing it. Eero ----------------------------------------- Eero Aro Audio Restoration Tonfiks https://www.tonfiks.fi/english