Displaying 4 results from an estimated 4 matches for "13khz".
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2002 Jul 13
0
ogg@48kb/s ~ mp3@96
As a matter of interest I tested the quality at -1 which has a nominal
bitrate of 45 but the 2 tracks I encoded both averaged out to exactly
48kb/s.
I noticed the lowpass defaulted to 15.1khz like -q0 so that may need
addressing at some stage. I used a lowpass of 13khz which overall
sounded better with less artifacts. I found it sharper & clearer than a
lame encoded mp3 encoded with -V9 which averaged 99kb/s. Lame defaults
to a 13khz lowpass at this quality. It was very acceptable & listenable
(if thats a word) on my cheap desktop speakers which h...
2002 Jul 03
2
CVS RC4 -q0 too good!
...almost perfect results and features audio
frequencies up to 21khz -- almost CD quality. In my opinion -q1
(80kb/s) is producing results similar or better than mp3@128.
Why not reduce the nominal bitrate down a couple of steps. Of course
some additional tuning will be required.
q 0.0 = 48kb/s (13khz lowpass)
q 1.0 = 56 (14khz)
q 2.0 = 64 (15khz)
q 2.5 = 72
q 3.0 = 80
q 4.0 = 96 (default)
q 5.0 = 112
q 6.0 = 128
q 7.0 = 160
q 8.0 = 192
q 9.0 = 256
q 10 = 320
This is still assuming 44.1khz sampling. I presume 22khz has it's own
table of quality/nominal bitrates.
Just thinking ou...
2003 Jun 20
2
Quality -1 default low-pass
...I think it should at least cut off at 15khz not 16khz and perhaps even 14khz. I believe it's important when streaming. Removing some of the higher frequencies compared to removing more of the audible sound makes more sense to me. Sampling at 33075 is an option but this produces a cut-off at 13khz which is too low in my opinion, and 32khz samples are not as well supported in players & soundcards.
Ross Levis.
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2002 Jul 05
2
quality scale 0-10
Caleb wrote:
> i dont understand you people.
>-q0 should be poor quality, only that in vorbis, the poor quality is
> actually good! :)
Another advantage I see in reducing the nominal bitrate for q0 to 48kb/s
with a ~13khz lowpass is a smoother transition in average bitrate and
frequency resolution from 22khz to 44khz sampling. Currently there is a
jump from 11khz (at 22khz sampling) to 15khz (at 44khz sampling -q0).
But then I suppose there is 33khz sampling but I don't think too many
devices support it....