AnsweredTime stretch loses audio fidelity once bounced

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RookOSU
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2017/03/28 19:04:58 (permalink)

Time stretch loses audio fidelity once bounced

I've noticed that when I time stretch (shrink, technically) a clip from X bpm to a quicker tempo, and hit playback, it sounds fine.  I'm actually impressed with the way Sonar is able to make it sound like it was actually recorded at that tempo.

THEN you bounce it to apply and make permanent, and it sounds like a blanket has been thrown over it, and a little gain sucked out.  All the transients sound like they have been hit with tiny ramp ups as well.  Freezing it, exporting it, quick freeze, slow freeze, they all have a 'bounce' as part of their step and it all sounds identically bad.

The only workaround I have found is to create a patch point at the output of the modified track, set up a new track arm and record from that patch point.  Then I have a new clip that is unstretched at the new tempo which sounds great.
 
Anyone else run into this?  It's very easy to test, especially evident with higher gain guitar.
 
- Shaun
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    reginaldStjohn
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    Re: Time stretch loses audio fidelity once bounced 2017/03/28 19:27:02 (permalink)
    I think there are some settings that determine what algorithm is used when bouncing down time stretched clips. Not at my DAW right now.  This is one for online rendering, what you hear when you just stretch and play and another one for off-line mode when you bounce.

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    brundlefly
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    Re: Time stretch loses audio fidelity once bounced 2017/03/28 20:02:10 (permalink) ☼ Best Answerby RookOSU 2017/03/28 23:30:40
    The 'online' real-time stretching algorithm is 'Groove Clip'. If you set the Offline algorithm to 'Same as Online' in Audiosnap Options then the bounced audio will sound the same as live stretching. It's been my experience that the theoretically less sophisticated Groove Clip algorithm yields the most transparent results in a lot of cases.

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    GMGM
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    Re: Time stretch loses audio fidelity once bounced 2017/03/28 20:38:22 (permalink)
    Subscribed.
     
    I've noticed the exact opposite in my setup. When I stretch audio, it gets choppy and ugly sounding. But once I bounce the audio to a clip, it's fine. I've never bothered to look any further into this function - but I'll be interested to know if there's a way to improve the unbounced clip sound.

     
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    RookOSU
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    Re: Time stretch loses audio fidelity once bounced 2017/03/28 23:22:11 (permalink)
    brundlefly
    The 'online' real-time stretching algorithm is 'Groove Clip'. If you set the Offline algorithm to 'Same as Online' in Audiosnap Options then the bounced audio will sound the same as live stretching. It's been my experience that the theoretically less sophisticated Groove Clip algorithm yields the most transparent results in a lot of cases.


    Thanks man.  But where do I go to see the algorithm options in Audiosnap options?  I'm not seeing them in the main Audiosnap options area for Edit > Preferences > Audiosnap

    EDIT : NEVERMIND.  I found it in another awesome post you made here : http://forum.cakewalk.com/Sonar-X3-Audiosnap-Can39t-get-it-working-for-the-life-of-me-m3532289.aspx
     
    Thanks that absolutely fixed my problem!
     
    - Shaun
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