Optimizing stretch algorythm

Smuggers · Post by **Smuggers** » Sun Jul 21, 2002 2:58 pm

Hi,

While I absolutely agree that the autostretch "ACID" algorythm is already quite good, it is nowhere the quality of ACID - no matter what people claim. It is very good for beat-related material, but doing a lot of melodic stuff myself, it is simply unusable. I did the test in both ACID and LIVE with a sustained note bassline, and while ACID had almost no audible artifacts, LIVE made it sound like driving on a bicycle with square wheels - it really stutters no matter what you do to the transients or HQ settings.

I suspect you are using some kind of granular approach, but I would really like to see that you guys go further in the research for create a better sounding version. I have to export all my loops at exact the same timing and cannot slow down or speed up while performing since it'll make me look like a complete amateur.

This is no rant, just a request. I absolutely *love* live, but for more melodic dance music it is not enough accurate in pitching to give a professional live performance.

-- Smuggers

[email protected] · Post by **[email protected]** » Mon Jul 22, 2002 5:48 pm

Smuggers wrote:Hi

-- Smuggers

Hi Smuggers,

You're right, and it will be done (by me :)

Also, as others have pointed out,
simply being able to bypass the
timestretching is very useful and
important, and this also will happen..

Cheers!

-Yon

[email protected]

perfectbuzz · Post by **perfectbuzz** » Thu Jul 25, 2002 10:26 pm

YON: do you mean that users will be able to turn off time stretching to hear the raw sample OR do you mean users will be able to choose to pitch the sample as a method of fitting the sample into the tempo period?

i think pitching the sample to time it is still valuable for many situations.

i think playing a sample with no time stretch of any kind is important too.

thanks,
marcus

The Kooky Scientist · Post by **The Kooky Scientist** » Thu Jul 25, 2002 10:56 pm

I kind of enjoy some of the artifacts that timestretching does to samples in Ableton Live. I hope all of the peculiar character of the timestretching as it is now doesn't disappear in future versions. Perhaps there can be 2 different modes. Low quality/lots of artifacts and Hi quality/not as many artifacts.

But I also once saw a performance by Survival Research Labs in San Francisco and they had a crazy machine which was a huge motor with 4 square industrial metal wheels. It took a lot of power and some time for that thing to get moving but once it did, it went bezerk !!

the kooky scientist

dirtystudios · Post by **dirtystudios** » Sat Jul 27, 2002 9:41 am

the scientist is dead on. half the fun i have with live is destroying sounds with time stretching. it would be a crying shame if that algorythm went the way of the dodo. if you do inprove it ableton, heed the scientist and keep the old option available.

berlin rules.

k

speedbird · Post by **speedbird** » Fri Aug 02, 2002 10:07 pm

Yon, do you have any idea in what timeframe the new algorithm will happen?
I'm really looking forward to some improvements, because unfortunately on anything else apart drumsloops it sounds terrible compared to ACID or Sonar XL. As someone earlier said it could be a desireable effect, but I would rather choose to have it as an option.
I really love the way Live is done, but the stretch algorithm could do with some improvement.

all the best,

Steve

yon · Post by **yon** » Sat Aug 03, 2002 12:17 am

Hello,

Let's see.. one cannot say much about the whats and whens of advanced stretching in Live,

** but I agree that..

pitching the sample to time it is .. valuable and playing a sample with no time stretch of any kind is important.

** Following multiple requests, we do hope to have a SRL timestretch mode someday, but perhaps not in the next release. this will most likely materialize in the manner of a show i saw where they attached a jet engine to a tuba.

** The current Live warping mode doubles as a nice FX option and so is quite interesting.

** Regarding timelines, barring death or dismemberment, this will happen for the next major release of Live, is all one can say.

cheers, yon

yon · Post by **yon** » Sat Aug 03, 2002 12:18 am

Hello,

Let's see.. one cannot say much about the whats and whens of advanced stretching in Live,

** but I agree that..

pitching the sample to time it is .. valuable and playing a sample with no time stretch of any kind is important.

** Following multiple requests, we do hope to have a SRL timestretch mode someday, but perhaps not in the next release. this will most likely materialize in the manner of a show i saw where they attached a jet engine to a tuba.

** The current Live warping mode doubles as a nice FX option and so is quite interesting.

** Regarding timelines, barring death or dismemberment, this will happen for the next major release of Live, is all one can say.

cheers, yon

[email protected] · Post by **[email protected]** » Wed Oct 30, 2002 9:10 pm

hey ableton guys,

just following up to this thread...we talked about various alternatives to time stretching back in July....when's the next release?

thanks,
marcus

PS - live is the most creative and productive software in my entire suite! thanks for everything.

speedbird · Post by **speedbird** » Sun Aug 17, 2003 5:32 pm

Well, we have the new version 2.1 now, but sadly I can't see a real improvement.
When you use guitars or bass with long notes, pads, etc. it's almost unusable, no matter how you tweak the controls.
With ACID or Sonar it just works without hearing any artifacts. You don't even have to tweak any parameters.

I'm very dissapointed!

Steve

Optimizing stretch algorythm

Optimizing stretch algorythm

Re: Optimizing stretch algorythm

optimizing stretch algorithm

following up on time-stretching