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Re: RTA question


For protools plugins,  Waves PAZ Analyzer is another option, and Metric Halo's Spectrafoo is another. They cost $$$ though, but that's protools. I find PAZ analyzer pretty useless unfortunately, as it is a victim of bad visualisation design. The implication is that the analyser is showing you a hi-res fft style analysis, when there are actually only 68 bands analysed. The display doesn't show a bunch of bars as a b&K analyser would, but discrete points joined by a line. the problem is the line that joins these discrete points is the dominant visual effect, but is meaningless in terms of the analysis performed. Thus it is very difficult to see whether a peak is actually a peak.

Also, I think a time series, rather than a real-time approach, is a better idea for locating problems like those you've outlined. These systems provide other problems though, primarily of the distortion of scale in colour mapped amplitude representations.

Haven't tried spectrafoo, it seems full of different little meters and is probably better. It definitely has a time series mode as well as a good fourier rta. it's fairly popular it seems. http://www.mhlabs.com/metric_halo/products/foo/

Audition is good, and the spectrogram and analysis tools are impressive. It seems best set up for two-track stuff though. i find editing painful in audition, but analysis is just as impossible in protools currently.

In terms of other suggestions, if you have a very narrow band pass filter you can use it to amplify a very narrow bandwidth by say 24 dB, then scan across the freuqency range to find the frequency you are concerned with, then reverse the band pass filter to a bandstop filter and that sound will be filtered out.

Hope this helps.

On Tue, 3 Aug 2004 22:02:20 +0200, Pawel Kusmierek <p.kusmierek@NENCKI.GOV.PL> wrote:

Assuming that RTA means Real Time Analyzer, SpectroGram is a good one and
is free for 10 days ($45 later)

BTW, in future you might consider using Adobe Audition rather than
ProTools.  Audition has a built-in analyzer (spectrogram display, spectrum
display, real-time spectrum).

Topher Farrell said:
I'm in the middle of editing sound for a film using Pro Tools and there
are a few resonating frequencies that appear in the audio, I'm trying to
notch them out, but I need an RTA that I can use side by side with Pro
Tools. Does anyone know of one that I can download from somewhere? Or
possibly have another suggestion? Thanks!

Pawel Kusmierek
Nencki Institute of Experimental Biology
ul. Pasteura 3
02-093 Warsaw, Poland
phone: (+48 22) 58 92 388
fax: (+48 22) 822 53 42
email: p.kusmierek@nencki.gov.pl