Re: [LAU] noise reduction

On Sat, 23 Jan 2016 14:58:29 +0100, Hermann Meyer wrote: "this does not remove the background noise during those parts where there is a signal" So IIUC "The problem at hand is hiss, so the kind of thing you could remove with a LPF, but in the process damage the recording by removing the sparkle..." this doesn't help the OP. Even using a notch filter in combination with a dynamic multi-band effect would have much impact to the "sparkle". I suspect that only a notch filter is able to keep the "sparkle" and to damp the hiss a little bit. Assumed the filter could be used for individual tracks instead of the sum, its to consider to use dynamic effects too. However, you can't fake Dolby and Co. for recordings that were already done without Dolby or Co., you only can provide a smarter kind of noise gate e.g. a gate that behaves different at different frequencies. Using an expander and after that a compressor with a different ratio and/or threshold seems to be not as smart as using a multi-band dynamic effect just to gate or compress a signal depending on the frequency.