>Does anyone know how a high pass filter is usually implemented? The
>convolution approach (like the low pass filter) seems like it would be
>expensive and require a lot of extra internal buffering: a 10Hz
>signal takes 4410 samples to represent one period. To get good
>frequency resolution (so
> According to my ISO doc (section 2.4.2.3), for layer III, decoders are not
required to support higher free format higher than 320kbps. So free format
is not restricted to <=320kbps.
> And decoders must support free format at least up to 320k.
My ISO 13818-3 documentation : Section 2.4.2.3
"The
>
> > The ISO spec says that free format bitstreams are limited
> > to 320kbs, but lame will allow you to specify any bitrate over 8kbs.
> > (lame prints warnings when using freeformat)
> >
> According to my ISO doc (section 2.4.2.3), for layer III, decoders are not
> required to support higher
> > Hello
> >
> > I would vote for a default 14Hz high pass filter, removable with the -k
> > option.
> >
> > Why an high pass filter:
> > *theorical minimum audible freq for humans is 20Hz (also very discutable)
> > *most soundcards are unable to reproduce less than 20Hz frequencies
> > *most
Hi, David!
> > What do You recommend to me? Use the in_mp3.dll of v2.22?
> What about doing a mp3 decoder quality test too ? :-)
a Mp3 decoder quality? Maybe after the Mp3 Encoders quality tests... why
not?:-)
> That in_mp3.dll is AFAIK fraunhofer based and fraunhofer is
> touted to be one of
> Hello
>
> I would vote for a default 14Hz high pass filter, removable with the -k
> option.
>
> Why an high pass filter:
> *theorical minimum audible freq for humans is 20Hz (also very discutable)
> *most soundcards are unable to reproduce less than 20Hz frequencies
> *most speakers are unable
While I preety much agree with the rest of the post, I must comment on
this one basis.
On Tue, 9 May 2000, Gabriel Bouvigne wrote:
[snip]
> why a 14Hz high pass filter and not a 20Hz one:
> because the lowest tone produced by a true musical instrument is 16Hz (it's
> from organ).
[snip]
And th
Hello
I would vote for a default 14Hz high pass filter, removable with the -k
option.
Why an high pass filter:
*theorical minimum audible freq for humans is 20Hz (also very discutable)
*most soundcards are unable to reproduce less than 20Hz frequencies
*most speakers are unable to reproduce less
On Tue, 9 May 2000, Mark Stier wrote:
> Hello,
>
> > File size is easy enough to measure, but "sound quality" is not.
> > It is purely subjective.
> > VERY HARD to define on a computer.
>
> Are there any examples demonstrating (so I can _hear_ them) that a
> 'mathematical' comparison algo that
Hello,
> File size is easy enough to measure, but "sound quality" is not.
> It is purely subjective.
> VERY HARD to define on a computer.
Are there any examples demonstrating (so I can _hear_ them) that a
'mathematical' comparison algo that tries to keep differences at a minimum
doesn't work?
I
Hi everyone-
Has anyone tested these new VBR streams on hardware players and had
negative effects? How many bits for frame were wasted when being forced to
hold to the ISO standards?
-Michael
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
[EMAIL PROTECTED] wrote:
>
> Mark Stier wrote:
> >
> > -BEGIN PGP SIGNED MESSAGE-
> >
> > Hello,
> >
> > have you ever thought of setting up a distributed Genetic
> > Programming network which lets you optimize or even find algorithms
> > suitable for music/speech compression 'automatical
Hello all!
If I remember correctly the Lame project started out to implement a
completely free audio encoder. But soon afterwards many patents came across
the developer's mysterious ways and decision was made to go along with MPEG
layer 3 and sh*t on the patents (a good idea anyway, IMHO).
But now
| OdesÃlatel: Shawn Riley <[EMAIL PROTECTED]>
| The album will be a mix of ballads & rock songs. How do you guys suggest
we do it?
|
| Note that we'd like there to have no percievable difference between the
original & effected sound in the studio.
| I decided that the MP3 encoding should be bad f
George wrote:
>
> What do You recommend to me? Use the in_mp3.dll of v2.22?
What about doing a mp3 decoder quality test too ? :-)
That in_mp3.dll is AFAIK fraunhofer based and fraunhofer is
touted to be one of the best ( ?? )
Did you think about doing the decoding yourselves and distributing
o
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