PPkiller
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- Apr 17, 2007
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udial at 44k, sampled at 96k :
udial upsampled at 96k, sampled at 96k:
will like to ask, how do u go about setting upsampled, and the sampled frequency? will like to find out the method u used, jus to rule out software resampling which took place in the OS audio path.
Quote:
udial upsampled at 96k, sampled at 96k:
will like to ask, how do u go about setting upsampled, and the sampled frequency? will like to find out the method u used, jus to rule out software resampling which took place in the OS audio path.
Quote:
Hi again!
I ran new analysis with improved settings and setup (more adequate gains, only 1 computer to avoid noise sources, better cables)
This time, benchmark results are better, but you'll see easily the artifacts I was talking about with the additionnal spectrograms at 44k.
Roll-off is confirmed due to a digital filter applied.
Spoiler alert: Upsampling is not optional.
44k/24bit performance
http://supercurio.project-voodoo.org/audio/audio-gd/RMAA/audio-gd-NFB-12-44k-24bit.htm
96k/24bit performance
http://supercurio.project-voodoo.org/audio/audio-gd/RMAA/audio-gd-NFB-12-96k-24bit.htm
192k/24bit performance
http://supercurio.project-voodoo.org/audio/audio-gd/RMAA/audio-gd-NFB-12-192k-24bit.htm
Samplerates comparison
http://supercurio.project-voodoo.org/audio/audio-gd/RMAA/audio-gd-NFB-12-samplerates.htm
44k/24bit without or with upsampling
http://supercurio.project-voodoo.org/audio/audio-gd/RMAA/audio-gd-NFB-12-44k-upsampling.htm
udial at 44k, sampled at 96k :
udial upsampled at 96k, sampled at 96k:
RMAA test wave at 44k, sampled at 96k :
RMAA test wave upsampled at 96k, sampled at 96k:
PS: sox graphs are generated with:
Code:for x in *.wav ;do sox $x -n spectrogram -o $x.png -x 1600 -s -t "$x" -w Kaiser -z 120; done