[Elecraft] NR settings at AD4C K3 now available at my website

[David Woolley (E.L)]

Matt Zilmer wrote:

> Does anyone have more input on MP3 vs WAV?

MP3 has a certain amount in common with noise reduction algorithms, 
although what is is trying to reduce is weak sounds so close to the 
signal that they won't be heard. With very good noise reduction it may 
completely blank noise that was only reduced by the noise reduction.

Whether it is valid to test noise reduction with a human ear, after the 
signal has been MP3 coded, depends on whether or not you believe that 
MP3 only removes what cannot be heard, anyway.

One should never use MP3 on signals that are going to be processed by 
something other than a human ear, and I'd personally be wary of using 
for any comparison of audio quality.

By WAV I'm assuming you actually mean 16 bit linear audio, as WAV is a 
wrapper format that can wrap MP3.

Unfortunately, in the same way that JPEG seems to be used for all images 
on the web, MP3 tends to be used for all sounds.  Both make assumptions 
about the nature of the signal and human perception.  (PNG is often the 
best format for screen shots, for example.)
-- 
David Woolley
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