Here are my two multi-filters I use on 78s.
Assumptions:
1. the recording is made flat
2. the file must be adequately declicked before using the 1st multi-filter
Down to business:
1. run multi-filter 1 using the correct EQ and low-pass rolloff to remove usless content. Adjust the median filter 3 for good records, 4-5 for bad.
Assumptions:
1. the recording is made flat
2. the file must be adequately declicked before using the 1st multi-filter
Down to business:
1. run multi-filter 1 using the correct EQ and low-pass rolloff to remove usless content. Adjust the median filter 3 for good records, 4-5 for bad.
- Make sure the final average volume of the recording peaks around -3db to -6db. Where I get short peaks that prevent me from making the overall volume of the file reasonable I use the dynamics processor or Punch'n'Crunch to compress the peaks.
- (I generally use standard mode, 4096 FFT, 30% overlap, 80-125 Attack, 180-250 Release, 8-20dB attenuation).
- I tend to push the attenuation as much as I can whilst avoiding noticeable changes in fidelity and artefact induction.
- On good records you can go as high as 20-25 no problems, on some bad records, 8dB may cause issues. If that happens, I use a high FFT as above, followed by another run with 1024-512FFT.
- Find a theshold (usually 30-35) that doesnt capture too much hiss in the VVA. I keep the output set to around 50-60. Any higher and it sounds too buzzy in places.
- Use the spectrograph and/or spectrum analyzer to establish the volume of residual noise and then move the threshold bars in the Punch'n'Crunch filter to be slightly above that.
- Keep the expansion ratio around 1.3-1.5 and the output attenuation around -6dB or more such that you dont get frequent/significant clipping.
- I'm generally too lazy to adjust the dynamic noise filters, but if you get too much hiss, increase the attenuation of the 1st 2 in the chain OR it means the deNoising was done badly/the VVA threshold was set too low.
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