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Re: arsclist cylinder frequency range

On 17-Jan-02, George Brock-Nannestad wrote:

> The signal processing described was among other things spectral 
> correction for the horn and soundbox complex. Please bear in mind 
> that some modern noise reducing algorithms already comprise 
> such physiological data reduction, which may compound problems 
> when data reduction is used in transmission.

A point to consider is that applying a low pass filter makes it harder
for the human brain to separate the clicks from the music. Remember that
a click includes all frequencies, not just high frequencies.  

That's why digital removal by Cedar or similar, actually replacing a
section of the data with interpolated values, gives better results than
any kind of overall filtering.

The low pass filter will also make it harder for such software to
identify the clicks, especially the myriads of small gritty ones. So I
would suggest making at least the original digital files at 44.1KHz or
even higher, then reducing down from there after any processing. Keep
the full frequency files as archives, and maybe halve the sample rate
for your MP3s.

Don Cox

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