Time Stretch Tests

[verb1]

I took a clip and stretched it -5 BPM using three different programs: Wavelab 5, Timefactory 2, and Sonar 6 (MPEX and Radius). Each WAV clip was "looped" for 4 bars at 24 bit, 48K then converted to a 192 VBR MP3. While I hear slight differences (Timefactory sounds thinner, while Wavelab more bassy), the differences weren't that great.

Original
original.mp3

Sonar MPEX
mpex.mp3

Sonar Radius
radius.mp3

Wavelab 5
wavelab5.mp3

Timefactory 2
timefactory2.mp3

I'll redo this test if someone provides a loop and the BPM change.

[Stitch333]

Any chance you could use a hardware time stretch like the Akai EB16 to compare against the software? Timebandit for mac os9 was the s**t. I still use it. I like the MPEX the best but its hard to really see what the algorythm is doin to the sound without a more dramatic shift in tempo.

[verb1]

I don't have any hardware, but I'd be glad to do another test if you provide a loop and how much you'd like it to change.

[Sirocco]

i think a more drastic stretch could tell the true nature of a algorithm much better

[illynoise]

Ain't nothing beating the DIRAC stretch in Wavelab 6. Hands down the best I ever heard.

[dlmorley]

How about analog time stretch!
I just picked this up, but have yet to test it. A Springer Eltro Tempophon!

from: http://granularsynthesis.music.net.a...is/gabor2.html

"The German company Springer made a device called the Tempophon. The device was similar to that designed by Gabor (Figure 3.5). This time/pitch changing device was installed in a number of analogue electronic music studios around Germany (Roads 1996a: 441). It was the first time granular methods were used in a commercial environment. In 1963 Herbert Eimert used the Tempophon for an electronic music composition called Epitaph für Aikichi Kuboyama"

[Stitch333]

Originally Posted by dlmorley

How about analog time stretch!
I just picked this up, but have yet to test it. A Springer Eltro Tempophon!

from: http://granularsynthesis.music.net.a...is/gabor2.html

"The German company Springer made a device called the Tempophon. The device was similar to that designed by Gabor (Figure 3.5). This time/pitch changing device was installed in a number of analogue electronic music studios around Germany (Roads 1996a: 441). It was the first time granular methods were used in a commercial environment. In 1963 Herbert Eimert used the Tempophon for an electronic music composition called Epitaph für Aikichi Kuboyama"

That thing is CRAZY! I want one....

my bad gettin off the thread, twin.

[illynoise]

here is the test using the DIRAC processor in Wavelab - 20 beats Per Minute
and minute and original minus 40 BPM's or 125 and 150 percent.

[verb1]

^
That was done with Wavelab 6?

[illynoise]

Originally Posted by J Twin

^
That was done with Wavelab 6?

Yeah, it's definately more timely than just doing it with the quick settings, but it sounds pretty good.

[Bob Olhsson]

Originally Posted by dlmorley

How about analog time stretch!

Wow, I haven't seen one of those in 40 years! It's kind of a pain to use...