Friday, November 01, 2013

another audio cleanup tool-chain - Reaper for noise reduction

In previous posts, I've mentioned using Cool Edit Pro and Sound Forge for audio cleanup. For audio with a lot of hiss, noise reduction with Cool Edit Pro produces a lot of artifacts. Reaper's ReaFir filter in Subtract mode is useful in such situations. For an old recording taken from a VHS tape, the following steps were used.

NR and gating in Reaper,

Then sweetening the sound using the EQ setting "30-band Punch and Sparkle" in Cool Edit Pro,

and finally RMS normalizing to -10 dB RMS with Sound Forge, choosing regions of roughly equal loudness.

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