| Odesílatel: Mark Stephens [EMAIL PROTECTED]
|
| How can you normalize without first scanning the entire file for the
loudest
| entry?
|
| mark stephens
You can use compressor, but it is not normalizing, it will decrease
dynamics. Then you should not scan whole file.
Regards
trimming and normalization can be done without first scanning the whole
file.
you'll to tell me how !
for the begining of the stream OK. But at the end, maybe there is a 2s pure
digital silence and the another thing...
And for normaliztion I don't see how at all, seince you need to need the
:: How can you normalize without first scanning the entire file for the loudest
:: entry?
::
MP3 can be adjusted by multiples of 1.5 dB without any quality loss.
So first code and track the biggest amplitude and adjust the MP3 in a second
pass. You have only to increase one byte per frame.
:: trimming and normalization can be done without first scanning the whole
:: file.
::
:: you'll to tell me how !
:: for the begining of the stream OK. But at the end, maybe there is a 2s pure
:: digital silence and the another thing...
::
2 seconds of digital silence (350 KByte) can be
00 1:20 AM
Subject: Re: [MP3 ENCODER] Correlation mid/side
:: | | Anyway I think that the very low frequencies are used in music like
:: | | drumbass with very good sound systems. The infra bass is something
I
:: | really
:: | | like in clubs ;)
:: | | Since I want to encode files in good qual
| Odesílatel: Steve Lhomme [EMAIL PROTECTED]
|
| Well, a pre-processor is what I'm programming. But you can't integrate it
| with lame since it can't work in real-time/pipe (for DC adjust, trimming,
| normalisation).
You should add some filter processing, for example notch filters for
50+100Hz
:: | Odesílatel: Steve Lhomme [EMAIL PROTECTED]
:: |
:: | Well, a pre-processor is what I'm programming. But you can't integrate it
:: | with lame since it can't work in real-time/pipe (for DC adjust, trimming,
:: | normalisation).
::
:: You should add some filter processing, for example
:: | Odesílatel: Steve Lhomme [EMAIL PROTECTED]
:: |
:: | Well, a pre-processor is what I'm programming. But you can't integrate
::
:: it
:: | with lame since it can't work in real-time/pipe (for DC adjust, trimmin
::
:: g,
:: | normalisation).
::
:: You should add some filter
| You should apply a 16 Hz lowpass filter for DC removal. Note that lowest
| organ note has 16.3Hz.
|
| Did you hear tones under 16Hz? Did you have speakerboxes that you will
give
| these low frequencies? I want to made sub-woofer with 16-30Hz range for
my
| home stereo, but no lower.
|
| Well.
| fubox volume
| 10 Hz 6250 l
|
| --
| Mit freundlichen Grüßen
| Frank Klemm
I will use double bandpass double chamber box (6-th order, "BOSE" type),
size (nice piece of furniture :-) approx 300 liters (270lt bassreflex at
20Hz + 30lt bassreflex at 56Hz) with single speaker at Qts
:: | | Anyway I think that the very low frequencies are used in music like
:: | | drumbass with very good sound systems. The infra bass is something I
:: | really
:: | | like in clubs ;)
:: | | Since I want to encode files in good quality (maybe playable in a club)
:: | I'd
:: | | prefer
| Odesílatel: Steve Lhomme [EMAIL PROTECTED]
| | Howdy Robert,
| |
| | Alex, if you remember Frank's post about DC offsets, there he
attached
| | a little C program to calculate AC/DC offsets as well as a
correlation
| | between left and right channels. (was around 00/08/05)
| |
| | I'm not
new option:
--nice: Changes priority depending on system load
(uses clock, gettimeofday and sleep: nice is not
portable and useless to it bad design)
--
Mit freundlichen Grüßen
Frank Klemm
eMail | [EMAIL PROTECTED] home: [EMAIL PROTECTED]
phone |
You should apply a 16 Hz lowpass filter for DC removal. Note that lowest
organ note has 16.3Hz.
Did you hear tones under 16Hz? Did you have speakerboxes that you will give
these low frequencies? I want to made sub-woofer with 16-30Hz range for my
home stereo, but no lower.
Well. I think you're
::
:: You should apply a 16 Hz lowpass filter for DC removal. Note that lowest
:: organ note has 16.3Hz.
::
using residuals (no 16.3 Hz tone, but 32.6 Hz and 48.9 Hz).
:: Did you hear tones under 16Hz?
::
It is difficult to speak from "hearing" in the range from 10...25 Hz (we
have
Howdy Robert,
Alex, if you remember Frank's post about DC offsets, there he attached
a little C program to calculate AC/DC offsets as well as a correlation
between left and right channels. (was around 00/08/05)
I'm not sure I read those - DC offsets aren't particularly relevant to my
current
::
:: Also, does anyone know the basis for the ISO switching criterion? Do they
:: really mean square energy (quadrupled magnitude)? They give no hints as to
:: how to reconcile the mid/side samples with the right/left psychoacoustics in
:: the loop section of the encoder. Computing
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