Displaying 4 results from an estimated 4 matches for "500hz".
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2010 Feb 13
1
Tuning Vorbis for Low Freq
Hi, I've tried vorbis on a stream that has ~500Hz tops and it worked quite good, but the raw data was converted to a fake 16bit 44Khz WAV
Are there any chances I can take the code and tune it to work with nonPCM data that has info from about 5 up to 500Hz?
It would be nice to know where to start.
Thanks you.
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2000 Jul 14
1
Borland Builder
...in os.h to compile under
C++Builder. It has the alloca prototype in malloc.h.
#ifndef __GNUC__
#ifdef _WIN32
# ifdef __BORLANDC__
# include <malloc.h>
# else
# define alloca(x) (_alloca(x))
# endif
# define rint(x) (floor((x)+0.5))
#endif
#endif
Encoding a full range pure tone (500Hz) seems to cause a domain error
in sqrt(). Can anyone confirm that under Linux?
Chris
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2000 May 08
3
Merge done
The merge of the format changes and new psychoacoustics is complete. There's
still tuning work left to do (most notably there's a somewhat
higher-than-acceptable level of background low-midrange/upper bass noise; this
is due mostly to incomplete psychoacoustic modelling data in the 100Hz-500Hz
range) however, at this point, pending bugfixes, the Vorbis 1.0 stream format
is frozen. Streams at this point should now be immortal.
I probably broke minor things on non-Linux platforms; check them out. I'm also
unburied to pay more attention to bug reports/compatability requests for other...
2004 Aug 06
2
Preprocessing and Echo Cancellation Notes.
First, I'd just like to thank the Speex community, and Jean-Marc
especially, for their great work.
I'm developing a VoIP library (which uses IAX, the asterisk protocol)
as the network protocol. I've been putting off integrating Speex for a
while, as things have been working pretty well so far with GSM. (for
those interested, the code is at iaxclient.sourceforge.net).
However,