Problems When Rendering Audio

 

I have created a Live set with six tracks, each of which contains a fair bit of real-time signal processing using both Live and Max for Live devices (some of which I programmed). When I render an audio track on my Macbook Pro, it does not sound the same as when I play the set in Live. It starts the same but towards the end of the set (maybe 3/4 of the way through), discrepancies emerge. For example, a passage that is supposed to be 'overdubbed' with Looper does not appear to loop, while other sounds which should have faded by that point do not seem to do so, etc. Is this because it is difficult for Live to deal with that much real-time signal processing?
 
When I had similar issues with a set a couple of years ago (figuring that the amount of signal processing was creating difficulties over a long-ish span of time), I just rendered the audio of shorter sections and then spliced them together. This worked then. However, since much of this piece is based on loops that repeat from the beginning of the piece, I'm not sure that would work: e.g. when I play the set from the middle, I do not hear these loops since they were just recorded once at the start of the piece. I wondered if it would work better if I rendered the audio of each individual track and then mixed these together?
 
I'm using Live 8.4.1.
 
Thanks

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sundar 11 months ago | 0 comments

7 answers

  • michael.j.mclaughlin20
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    if you are using looper, i would say, duplicate the track first and flatten it. that might be the best way to do it.

    11 months ago | 0 comments
  • sundar
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    Sorry, I didn't understand your terminology. Do you mean that I should render audio from the individual tracks and mix them? Or do you mean that instead of using Looper, I should just c&p material in the Arrangement? (It would be hard to duplicate e.g. the decaying effective of a loop on "overdub" with 75% feedback or to duplicate reverse playback.) What do you mean by "flatten it"?

    11 months ago | 0 comments
  • michael.j.mclaughlin20
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    So, freezing and flattening is a process in which you digitally "freeze" the knobs in a particular track, and then "flatten" that track to audio. My idea is to duplicate the processor intensive track, to take out the factor of overprocessing, which would probably not happen in ableton's rendering.

    If that causes the audio to be rendered correctly, then I would recommend checking you automation logic. possible causes could be anything from: the looper is not turned on in the correct clips, to the looper not being routed correctly.

    Post back.

    if you are in session view, how are you rendering? are you putting everything to arrangement view, then rendering or recording your performance externally? How are you rendering when you are in session view?

    11 months ago | 0 comments
  • sundar
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    Could you take me step-by-step through how I 'freeze and flatten' the tracks? I'm still not clear on it, sorry. 

    I have always rendered audio from Arrangement view (probably because I am trained as a composer; I am not a DJ). I set the punch-in and punch-out points and then choose "Export Audio/Video" (shit-cmd-R). Why would one do it from Session view?

    11 months ago | 0 comments
  • sundar
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    OK, I figured out freezing and flattening and tried it but it doesn't help. When I freeze EVERY track, weirdly, it's even worse: Loopers just stop playing at arbitrary points even though they are automated to play continuously with 100% feedback. When I freeze the one track that was giving me difficulties, the result just sounds like it did the first time around, even though that's not how things sound when I play the Live set.

    I'm just treating Looper as another audio effect in a chain. Is there something special about how it needs to be routed?

    11 months ago | 0 comments
  • sundar
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    I could fix most of the problem by duplicating the one problem track twice and splitting up the material on the track, so that only one section of the material appeared on each version of the track. Still not perfect but much better.

    11 months ago | 0 comments
  • michael.j.mclaughlin20
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    If your set works correctly when you just press play and listen to it, or you perform along with it then the following might work for you.

    I would just set up an audio track, and set the input of that audio track to the output of your looper tracks.

    Then, as you are performing/playing your set, just record into the new audio tracks.

    The output of the troublesome tracks must have been right at one point in time. Find when that was and record from that version of your set.

    11 months ago | 0 comments

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