Re: [ARSCLIST] Packburn 323A

["Richard L. Hess" <arclists@xxxxxxxxxxxxxxx>]

Hello, Jan,

Coming at least from the tape perspective, using static filters to 
reduce constant noise takes out program with the same efficiency as 
it takes out noise.

In my opinion, the only benefit from static filtering occurs when you 
cut the high frequencies in the reproduction chain is when you cut 
highs that contain no program material, only channel noise. Once you 
use a filter to lower the bandwidth and you go into the audio, you're 
starting to kill the audio.

That is why there are dynamic smart filters that can remove some 
noises with varying degrees of effectiveness.

From my limited experience, the impulse noises are best removed with 
the Cedar DeClickl system, and I think the higher-end implementations 
of Algorithmix work reasonably well (the version in the Audio 
Restoration tools in Samplitude is the best mid-priced one I've seen 
so far for impulse noise, but for pro use, it probably pays to get 
the pro version).

I have Algorithmix Noise Free Pro for background noise removal and 
it's one of the best out there. Cedar is also good, but more expensive.

I think in both the Cedar and Algorithmix cases, you'll find that 
these are far more complex than what you're proposing and there is a reason.

I use the FFT filter to sharply tailor the bandwidth to program 
source when I'm attacking noise.

Remember, using bandwidth limiting should come AFTER you do impulse 
noise removal as the wider bandwidth is very useful for the impulse 
noise tool to differentiate between noise and program.

Of course, you should save widebandwidth, unprocessed copies of these 
transfers and only clean up access copies.

I really think the tools in the digital domain have the potential to 
do much better than the tools in the analog domain.

Cheers,

Richard

Richard L. Hess                   email: richard@xxxxxxxxxxxxxxx
Aurora, Ontario, Canada       (905) 713 6733     1-877-TAPE-FIX
Detailed contact information: http://www.richardhess.com/tape/contact.htm
Quality tape transfers -- even from hard-to-play tapes.