>
> Could somebody tell me if encoding of 24kbit/22.05khz sound should
> sound like this:
>
> http://subband.com/lame24kbit22khz.mp3
>
> Thanks,
> D
>
I think the problem is you are using stereo - Most 24kbs encodings are mono :-)
The standard MP3 "near CD quality" is: 44.1khz encoded at 64kbs per
channel = 11x compression. I wouldn't expect good results at
anything more than 11x compression.
The amount of compression (one channel) in your sample is
(22050 Samples/sec) * (16 bits/sample) / (14000 bits/second) = 25
which is well behond MP3's capability!
Some comparisons:
44.1kHz at 64kbs per channel = 11x compression
22.05kHz at 14kbs per channel = 25x
22.05KHz at 28kbs per channel = 13x
16kHz at 28kbs per channel = 9x
Also, when you downsample, it seems you can get better results
by using a gradual lowpass filter, rather than a sharp cuttoff at
exactly 16kHz (or 22.05kHz).
Mark
--
MP3 ENCODER mailing list ( http://geek.rcc.se/mp3encoder/ )
