Best way to downsample ?

[Eye of Horus]

Hi all,

I have a 24/96 soundstream ripped from DVD-A. With a small utility (Thanks Thomas !) I was able to convert the raw stream to a usable wav . Ripped the stream with Vstrip.

What is the best method to downsample this to 16 bit 44.100 ?

I have Soundforge 6 and Cooledit .

What options do I need and which give the best result ?

Any input is welcome !

regards,

Eye of Horus

[DSPguru]

SSRC with the ATH based noise shaping

[Eye of Horus]

Originally posted by DSPguru
SSRC with the ATH based noise shaping

Hi DSPguru.....

Huh ?? Can you be a bit more precise, I have no clue what you're talking about :-)

EoH

[DJ Bobo]

SSRC is rumored to be the best downsampler. It's included in BeSweet AFAIK.

You can also use WaveLab to downsample. The quality is perfect und it works a lot faster than SSRC.

[Eye of Horus]

Originally posted by DJ Bobo
SSRC is rumored to be the best downsampler. It's included in BeSweet AFAIK.

You can also use WaveLab to downsample. The quality is perfect und it works a lot faster than SSRC.

Used Besure/Besweet. Just finished, but output is only white noise.
I suppose I have to use that Noise shape function DSPguru mentioned, but how ???

I am sure there are a lot of other programs that can downsample, but I am interested in how to get the bestresult. I suppose Wavelab will also give you a lot of options for the Downsample routine ? What are the best ? And in which order ? In SF I first downsampled to 44.100 and then from 24 to 16 bit. But there are so many options there....

EoH

[DJ Bobo]

WaveLab has perfect downsampling routines.
There isn't much options.
You can do it under batch processing to get highest speed.
There you select the downsampler (set it oh High Quality of course), you select 16-bit WAV output format, the output directory and then you run it.

Note than WaveLab will downsample in 32-bit floating point mode, than dither to 16-bit. So don't worry about that.

Speed: to downsample a 20-min 24-bit Mono WAV @48KHz to 16-bit WAV @44,1KHz, it takes only one minute on my P3@667MHz.

[rjamorim]

Originally posted by Eye of Horus
Huh ?? Can you be a bit more precise, I have no clue what you're talking about :-)

SSRC is Naoki Shibata's sampling rate converter.
http://shibatch.sourceforge.net

Fast (ICL6) compile:
http://www.inf.ufpr.br/~rja00/others.html

IMO, the very best sampling rate converter is the one in Magix Samplitude or Sek'd Sequoia (both use the same routines)

I use mode Ultra High 1. Very slow, but you get what you asked for: ultra high resampling quality.

You can probably arrive at that conclusion checking this sampling rate converters comparision:
http://www.ne.jp/asahi/fa/efu/fsconv/fsconv_2.html

The page is in japanese, but the graphs speak by themselves.

Regards;

Roberto.

[Eye of Horus]

Originally posted by rjamorim
SSRC is Naoki Shibata's sampling rate converter.
http://shibatch.sourceforge.net

Fast (ICL6) compile:
http://www.inf.ufpr.br/~rja00/others.html

IMO, the very best sampling rate converter is the one in Magix Samplitude or Sek'd Sequoia (both use the same routines)

I use mode Ultra High 1. Very slow, but you get what you asked for: ultra high resampling quality.

You can probably arrive at that conclusion checking this sampling rate converters comparision:
http://www.ne.jp/asahi/fa/efu/fsconv/fsconv_2.html

The page is in japanese, but the graphs speak by themselves.

Regards;

Roberto.

Interesting !!! But just looking at the graphs, it doesn't show much difference with Soundforge.
I lost the help files in SF and that's why I asked in the first place.
A simple re-install did the trick :-) . I now know the best settings.
Results are very good !
For now I will stick to SF, but I sure want to give the other programs a try. Which lead me to the ,at this moment for me, most important question :
I use Cooledit to make 5.1 surround from stereo (see my guide on this forum). It uses the Aurora plugins, which are XFM. Cannot use these in Soundforge. Which other program, that also uses a good batch routine (the one in Cooledit sucks !), can handle these plugins with extension XFM ????

All your input is much appreciated !!! thanks !!

Eye of Horus

[The Belgain]

I'm clearly wrong, but I thought it wasn't yet possible to rip audio directly from a DVD-A. Did you rip it directly or did you loop it through your sound card?

[Eye of Horus]

Originally posted by The Belgain
I'm clearly wrong, but I thought it wasn't yet possible to rip audio directly from a DVD-A. Did you rip it directly or did you loop it through your sound card?

No, I ripped the stream with Vstrip. You have it in RAW format then. I processed the stream with a small utility that made a correct WAV from it. BTW I have tried this with Smartripper too, but then the stream wasn't usable !
One sidenote : it is a rare format stereo DVD-A . Because actually it is a DVD-V with as sound only a stereo 24/96 stream (DAD 1035 : I Robot - The Alan Parsons Project). The video on this disc is however only a menu.

Eye of Horus