Topic: Wave Pitch editing?

Viewing 11 posts - 16 through 26 (of 26 total)
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  • January 5, 2010 at 22:58 #17233
    Zynewave
    Keymaster

    I looked at the Dirac free sdk a while back, but I dismissed it for various reasons. Not being able to process a multi-channel file with phase lock of the channels is unacceptable.

    I already have the basic components for a crude time-stretch and pitch shift. I made those when I implemented the zPitch plugin. The algorithm is similar to the one used in SoundTouch, meaning it is light in CPU use.

    January 6, 2010 at 03:03 #17238
    UncleAge
    Participant

    @kyran wrote:

    I don’t think the algorithm should be state of the art good

    I’m not trying to be argumentative at all… But I don’t agree. I’m just saying, personally, I want the best (well, within reason of course). I have Melodyne for the serious stuff but it would be nice to just stretch a clip to fit the tempo and not hear horrible artifacts is all.

    Regardless of which avenue is pursued I hope Frits will leave an opening to update it to a better/best algo somewhere down the line once funds permit.

    January 6, 2010 at 10:36 #17240
    kyran
    Participant

    Making a state of the art time stretch is probably a full time job, why would all those big companies license zplane if it wasn’t.

    For me personally, I use timestretch as a special effect, so graininess is actually good in that approach or to clean up slightly off time recordings (a la live’s warping or logic flex time).
    When “cleaning” recordings I want minimal artifacts, but these are mostly just minor adjustments, so even with a less than stellar quality algorithm the results should be ok.

    Now if you want to stretch out loops over 25% with good quality, you need a good algorithm. I currently do this in a wave editor which uses the zplane algorithms. If this is possible in podium, all the better, but I’d rather have something than nothing, and I think a lot of use cases can be covered with a simple algorithm.

    January 2, 2011 at 12:42 #20205
    kingtubby
    Participant

    QuikQuak have made a time stretching/pitch shifting engine called Copula:

    http://www.quikquak.com/Prod_Copula.html

    To quote the Dev, he says: “Copula is an engine to be licensed, and not a real-time plug-in as such…”

    As far as I can tell it’s still in development, but there is a standalone version available which demonstrates it’s abilities very well and in a good light I think. No information on pricing though.

    Might be worth investigating?

    Mart.

    January 2, 2011 at 18:41 #20210
    Zynewave
    Keymaster

    I’ve grabbed the link, for later research. Thanks.

    May 15, 2011 at 20:12 #20696
    adimatis
    Participant

    As time stretching / pitch shifting is something I use quite ofetn, I am very interested if something new on the subject has been worked on.

    To me, the zPlane is probably the best engine, but I understand the limitation due to the cost. Would “the basic components for a crude time-stretch and pitch shift” be more ready for release now? I’d love seeing that implemented!

    May 16, 2011 at 22:11 #20700
    Zynewave
    Keymaster

    @adimatis wrote:

    Would “the basic components for a crude time-stretch and pitch shift” be more ready for release now? I’d love seeing that implemented!

    No progress in this area, sorry. I’ll be using the simple stretching algo I implemented for zPitch, when I start work on time-stretching. Check out zPitch to evaluate whether you think the quality is acceptable.

    May 17, 2011 at 13:57 #20704
    adimatis
    Participant

    I find your algorithm very adequate! The time-stretching feature could be extremelly time consuming to implement, I think the time/detail ratio grows exponentially when you want to get it perfect. But for a simple stretching 10-30 % (which for me would be the most common use) I think z-algo 🙂 would be great.

    I find zPitch very usefull for up to 3 half-tones up and down. A similar in time-strech would be ver good.

    Thanks!

    June 10, 2011 at 12:54 #20756
    xis23
    Participant

    yeah zpitch is cool and I use it a lot. Some samples it doesn’t really matter what speed they are played back at that though, so being able to do a simple pitch change as in how a sampler works would be nice.

    September 12, 2011 at 00:11 #21004
    soundwave
    Participant

    @Zynewave

    …didi u actualy know about this? http://www.ronimusic.com/amsldowin.htm

    …its an amazing tool, tried the demo, and got some cool textures… check it out …wouldnt be bad as a timestretch tool in Podium….

    December 21, 2012 at 15:14 #22615
    kingtubby
    Participant

    A new time stretching library is available here:

    https://www.samplesumo.com/time-stretching

    There is a contact link on the page re. pricing

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