[RWP] changing tempo in reaper.

[Derek Lane]

I thought that at first, but that makes a measure from the selection, but 
doesn't set the initial project tempo.  I had to read his directions 
carefully to get the subtle differences.  Now, heres something that would be 
cool.
Lets say someone loaded any given motown track in to reaper and marked off 
every measure by selecting the content and pressing alt shift c, wouldn't it 
be a wild thing if somehow you could set the project tempo, then use those 
marks for reaper to figure out how much various parts of the audio would be 
stretched or compressed to make those musicians from the past play to any 
click you then chose?
----- Original Message ----- 
From: "Roy Shtupler" <shtupler at 013.net>
To: "Reapers Without Peepers" <rwp at reaaccess.com>
Sent: Saturday, May 22, 2010 6:38 PM
Subject: Re: [RWP] changing tempo in reaper.


>I think the keystroke for the detection is Alt+Shift+C.
> cheers
> Roy.
> www.soundclick.com/tzackeek
> ----- Original Message ----- 
> From: "Scott Chesworth" <scottchesworth at gmail.com>
> To: "Reapers Without Peepers" <rwp at reaaccess.com>
> Sent: Saturday, May 22, 2010 8:00 PM
> Subject: Re: [RWP] changing tempo in reaper.
>
>
>> Hi Derek,
>>
>> Only started exploring this myself last night, so forgive the
>> inevitable rambling.
>>
>> For simplicity, let's assume you have a project with a single track of
>> audio, you know it was recorded to a click, but you want to identify
>> the original bpm then be able to adjust that at will.
>>
>> First, we need to ensure that the timebase for this track is set to
>> time, rather than beats or position or anything else, otherwise when
>> Reaper adjusts the project tempo it's also going to start tinkering
>> with the playrate of the audio before we want it to. Set the timebase
>> for the track in the track menu, or do it for the whole project in
>> project settings if you prefer.
>> Next, we need to mark out a bar (or measure on your side of the pond)
>> for Reaper to be able to figure out the bpm. Place the time selection
>> neatly around a measures worth of audio with Alt+Shift+[ and
>> Alt+Shift+]. You can check the selection is neat by looping the
>> selection, or my new favourite way is to jump to slightly before the
>> start of the time selection and then use Alt+Space to play missing out
>> that chunk you've selected. Whichever method you choose, if everything
>> sounds neat and in time you should be good to go.
>> Now, we need the actions list because by default this action isn't
>> bound to a keystroke. Hit F4 to show the actions list, and type tempo
>> into the filter box you land in. Tab round to the multi-select list
>> box of choices, and choose "Set project time signiture / tempo from
>> time selection...". Tab round to "Run/close", and you should be taken
>> directly to the project settings box. Shift tab once will read you the
>> new tempo Reaper has decided upon, and it's unlikely to be right on
>> the money but it will be close if you're selection was accurate.
>> Accept it, because annoyingly the box is read only at this stage. Now
>> when you play the project, the click should be roughly right although
>> it'll probably drift over time. Head back into Project Settings with
>> Alt+Enter and adjust that tempo to the nearest whole number, and that
>> should cure the drifting, think Reaper is a bit oversensitive.
>> The last step is to make sure that your track or project timebase
>> (whichever you modified earlier) are set back to "Beats (position,
>> length, rate) so that the audio will sync. Now, if you try adjusting
>> the project tempo in project settings, the track should sync to each
>> change perfectly.
>>
>> FWIW, I've only tried this so far on quite standard tempo 4/4 stuff as
>> time is of the escence here at the mo, but I'd assume it can work with
>> other time sigs too because the boxes to specify those aren't read
>> only at any stage, my guess is that the read only tempo box would
>> recalculate if you typed in 6/8 or whatever.
>>
>> Hth
>> Scott
>>
>> On 5/22/10, Derek Lane <derek at pdaudio.net> wrote:
>>> I'm missing how to get audio to sync to tempo.  The autodetect features 
>>> seem
>>> to not be working, and checking the box to do this in the project 
>>> properties
>>> is doing nothing.  Can someone tell me what I'm missing or provide a 
>>> step by
>>> step reference as to how this is to be done?
>>
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