Note that when using a high-pass (or low-pass) filter, the filter frequency is defined as the frequency that the attenuation reaches a certain level (often -3dB) but the filter begins to have some effect before that frequency, so a 20Hz high pass filter will reduce the 30Hz range by a small amount, 20Hz by a larger amount, 10 Hz by a substantial amount.Īlso, higher dB/octave settings can cause a bit of ringing on transients. I don't do a lot of vinyl copying, so hopefully others will provide more comprehensive responses, but the general rule with any kind of audio restoration is to keep the processing as gentle as possible.įor example, with rumble filtering I'd try running the high pass filter at 10 Hz 6dB per octave - if that's not enough, then go to 15Hz 12dB/octave and so on until any remaining rumble is sufficiently low to be acceptable (there are no hard and fast rules about what is "acceptable").
Thanks in advance for all the great advice that I have been getting. Noise Reduction 12db, Smoothing 500Hz, Attack/decay 0.50 secsĢ- Are these parameters generally okay? Would you make any changes to them?ģ- Would you make any adjustments to the Workflow? If so, why? 7071, Cutoff 20 Hzġ- Are these parameters generally okay? Would you make any changes to them?Īcquiring 1 sec quiet section from lead-in for Noise Profile (this is normally general vinyl noise, a low roar with some rumble) High Pass Filter: Rolloff -24db, default Filter. Optionally run Chris’ Dynamic Compressor (still undecided on this)
Reopen in Audacity (and save “filename_ed_cr.au”)
Run ClickRepair (Declick 35,PitchProt on, Decrackle off, wavelet) Remove Subsonic rumble using Audacity High Pass FilterĮxport WAV file to be run thru ClickRepair I borrowed from the experiences of Forum contributiors for my Workflow which is as follows:Ĭapture in Audacity (save as “filename_Raw.au”) It has a nice combination of loud passages as well as some very quiet ones. As my first Audacity Project I have recorded 2 old Ramsey Lewis Trio albums (purchased in the 60s), cutting out some songs that I never cared for and combining 2 albums into one really great album.
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