Old 10-12-2018, 06:02 AM   #1
barrymk
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Default Increasing tempo - my brain hurts...

I'm in the middle of a new song and as usual I started recording it at too slow a tempo. Most of the basic tracks are recorded so I don't want to start all over again. I've changed the playback rate to 1.1 keeping pitch and that's given the song the right lift. I want to record a few more tracks without getting tempos mixed up so that all tracks new and old are compatible. What's the best way to handle this? Cheers
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Old 10-12-2018, 06:49 AM   #2
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I'm afraid you can only re-record, or leave it as it is.

If you don't like the sound degradation that changing the Tempo/Playback Rate has on tracks,
there's actually little you can do about it, except speeding them up with a better software..

(Edit: You could try using Izotope RX..)

However, bear in mind that +90% of ppl will never notice,
unless we're talking about a very radical tempo change.


Still, even the best software will never be Perfect,
so (as always) the best option is to set the new desired Tempo, and re-make the whole thing..

But take in on the Bright side:
With the new tempo settled, the tracks will have a more defined and natural Feel,
plus you have a chance to do it even Better than the first time.

Last edited by ernzo; 10-12-2018 at 10:40 AM.
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Old 10-12-2018, 08:05 AM   #3
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Try Stretch markers using Transient Optimized Mode.

A quick intro to the usage:
https://www.youtube.com/watch?v=rid4NpN8mqY

They might do the trick, especially when speeding up a track, because instead of merely time-stretching everything it can behave more in a way that basically cuts transients short and you won't notice as many artifacts. Of course it depends on the source material, but I've done it many times in the past and it works well. Requires some time editing and experimentation on your part - just try a small section first and see how it goes...

If you have the time and patience, simply grouping together tracks and splitting at transients and moving things around can yield the best results. In the past I've even intentionally recorded something like drums and bass slower, then edited them to be faster in this way to provide a super tight sound without any signs of "stretching" or time shifting.
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Old 10-12-2018, 08:12 AM   #4
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Quote:
Originally Posted by barrymk View Post
I'm in the middle of a new song and as usual I started recording it at too slow a tempo. Most of the basic tracks are recorded so I don't want to start all over again. I've changed the playback rate to 1.1 keeping pitch and that's given the song the right lift. I want to record a few more tracks without getting tempos mixed up so that all tracks new and old are compatible. What's the best way to handle this? Cheers
I've done the same thing on one project a few years back, but the project turned out OK in the end. There was one side effect IIRC.

I was clicking some of the newer wave files at one point and found that since they were being recorded at a different rate than the first ones, it made them pitch shifted when played outside of REAPER using something like Media Player, where the original waves that were recorded before the tempo change played at the right pitch, but wrong tempo.
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Old 10-12-2018, 08:56 AM   #5
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When you say compatible, if you mean keeping them all the same when played outside reaper, as Glennbo mentioned, then i would advise that you put your playrate back to 1.00 and adjust the tempo, change all the individual item playrates to 1.1 and then glue them before you record anymore parts. This would ensure all your parts are at the same speed (obviously you'd need to be careful with your timebase settings during this process)
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Old 10-12-2018, 09:23 AM   #6
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Thanks for the replies, what I was wondering was is there a way say to render the existing tracks then use them when recording at the new tempo? Apologies if I didn't make that clear.
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Last edited by barrymk; 10-12-2018 at 09:27 AM. Reason: Thanks for the replies. What I was wondering was is there a way to perhaps render the existing trackjs then use them at the w
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Old 10-12-2018, 09:34 AM   #7
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Quote:
Originally Posted by barrymk View Post
Thanks for the replies, what I was wondering was is there a way say to render the existing tracks then use them when recording at the new tempo? Apologies if I didn't make that clear.
You could solo one track, render it to wave, then solo the next track, render it to wave, and so on.

Once you have have rendered all the tracks individually, set the tempo back to normal and import them.

More work than I'd probably go, but if I were going to do it like that I would make sure that no effects or envelopes were in effect when rendering, or else you will be stuck with the results.
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Old 10-12-2018, 09:59 AM   #8
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Isn't there a function to right click and make playrate permanent or similar... Not at computer to check but thought there was something like this.
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Old 10-12-2018, 10:04 AM   #9
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Quote:
Originally Posted by Glennbo View Post
You could solo one track, render it to wave, then solo the next track, render it to wave, and so on.
That would be the regular way to go.


On a side note,
I just checked Izotope RX and it actually has fully featured Time & Pitch controls.

So if audio quality/degradation was the issue, perhaps you could try using RX to stretch the original files..
then change the project tempo, and import the new files.

I don't know how RX will compare with Reaper/Elastique? in terms of quality/degradation,
but for all other purposes, their algorithms are state of the art and tend to give very good results.
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Old 10-12-2018, 10:35 AM   #10
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Thanks, a lot to have a look at. This forum rocks as always.
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Old 10-12-2018, 02:07 PM   #11
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Well now a small lightbulb went off in my head! Rate 1.1 equals a 10% uplift and the original BPM was 86 so I increased the BPM by 8 to 94. Close enough. Sometimes the simplest answers are the hardest to bring to mind!!!
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Old 10-13-2018, 06:19 AM   #12
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Old 10-13-2018, 07:18 AM   #13
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Quote:
Originally Posted by Stella645 View Post
Never saw that one coming Stella645! 10 years into Reaper and I haven't scratched the surface.
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