On Mon, 17 Aug 2009, Gabriel Vinazza wrote:
how can i open this creepy file?
uncompressed 8-bit PCM
mono
samplerate 11025
bitrate n/a
i tried some -raw parameters with soundfiler and get the pitch but
still sounds very noisy
Depends on how well the original file is using the range it has. You don't
use plain 8-bit PCM to represent both loud sounds and quiet sounds,
because e.g. if a certain quiet sound has 1/32 of the amplitude of a fully
loud sound, then it's using only 3 bits instead of 8 bits...
Using too few bits introduces a lot of noise, but this depends on the
interpolation being used. If you convert it from 11025 to 44100 the
obvious way, you'll get a lot of very-high-pitched noise. Applying a
low-pass filter like [lop~] (or several of them) can get you something
similar to having used interpolation.
Perhaps you are actually not reading the file using the correct specs, but
you don't give us any way to verify that.
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| Mathieu Bouchard - tél:+1.514.383.3801, Montréal, Québec
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