[RWP] Time Selection and Trimming Midi Loops

[colin McDonald]

as long as you have no latency in your system, you can align, or sink the 
audio track to the metronome...
any amount of latency will throw this off as I discovered and posted about 
some time ago.
Yes, the tap tempo function works in ReaAccess, but again, latency, 
processor speed and all that will play into the over all accuracy and 
timelyness of the tap tempo function.
with recorded audio, it's more difficult to utilize measures, beats per 
minute, and all that kind of thing, along with the metronome...there aren't 
too many drummers or musicians who can keep absolutely perfect time, unless 
the drums etc have been recorded using a click track.
you should be able to utilize the functions you indicated using midi and 
software bassed instrumentation where you can use electronic/coding 
manipulation, as aposed to time bass manipulation.
hope that makes sence...you should be able to get zero crossing loops in 
reaper without any trouble.  I haven't used it, but there is snap to and 
zero crossing functionality in reaper that is easily accessed with ReaAccess 
keyboard commands.
with jims scripts, it makes it easier to go to the beginning and ends of 
items or selections to nudge or trim them to obtain that zero crossing.
I don't know precisely what the zoom factor is if you will, but I think you 
can get it out to 128 parts per beat....a bad way to explain it, but 
essentially you can have 128 incraments in a single beat as recognized by 
reaper weather it's midi or audio...all accessed using arrow keys and 
scrubbing/nudging commands.
perhaps 128 incraments isn't enough for you to create a zero crossing for a 
loop, but I would suspect that a milli second or two wouldn't be noticed by 
the human ear on a drum loop.
especially an audio drum loop.

Regards
Colin
----- Original Message ----- 
From: "indigo" <33indigo at charter.net>
To: "Reapers Without Peepers" <rwp at reaaccess.com>
Sent: Monday, April 16, 2012 3:03 PM
Subject: Re: [RWP] Time Selection and Trimming Midi Loops


> Colin, I haven't done it yet, but it seems to me if you can nudge or scrub 
> to the very first note of your audio, and set beginning of loop with 
> alt+left bracket, then move to the  very last sound on your audio item, 
> and set the end of loop with alt+right bracket; and when you play the loop 
> you hear nthat notes aren't being chopped off at either end; then   you're 
> in a good position to split items with shift+S and end up with 3 items, 
> item 1before your music begins;item 2 your music, and item 3after the end 
> of your selection.
> You delete item 1 and item 3, and you have the audio loop.
> Colin, you know, at this point; if I really wanted the audio to loop 
> seamlessly, I'd take it to Sound Forge, where I have experience with 
> adding or subtracting samples to a loop, until I get a perfect zero 
> crossing, no click or gap.
> But, please tell me if this is right; first, to get the audio aligned with 
> beats, in Reaper; there's a setting in general project settings to choose 
> measures beats length.
> I'd select that.
> Then, right near that selection there's another that seems to be for 
> forcing to align with beats, not the exact words, but I believe that is 
> what it's for.
> That selection was also close to one about Reaper's default stretch plug, 
> Elastique.
> Then I'd turn on the metronome and learn if the audio's loud transcient 
> points, like the kick drum, are being forced to align with beats.
> Actually, it might be better first to manually align as close as possible 
> with the tap tempo button, if that works in ReaAccess, then force the 
> transcients to align with beats afterward.
> When I get back in Reaper, I'll get the correct wording for those project 
> selections and test this out; but am I right about what they do?
> Then, after the audio aligns with beats, I'd save it and  take it to Sound 
> Forge to make it loop seamlessly.
> I'm loving this thing!
> Indigo L
>
> On 4/16/2012 4:18 PM, colin McDonald wrote:
>> precisely.
>> you can do this with regular recorded audio as well.
>> Not as straight forward as selecting beats because normal audio isn't
>> clocked obviously, but you can set a tempo or BPM for the project which
>> is fairly accurate.
>> If you know that your material is at 120BPM, you can set the project
>> tempo and then edit acordingly.
>> Using track Items is truly an excellent way of editing audio.
>> you can have unlimited items on each track which can be easily selected
>> using the control and arrow keys.
>> it gets even better when you get into scrubbing and various nudge
>> functions.
>> Regards
>> Colin
>> ----- Original Message ----- From: "indigo" <33indigo at charter.net>
>> To: "Reapers Without Peepers" <rwp at reaaccess.com>
>> Sent: Monday, April 16, 2012 2:07 PM
>> Subject: [RWP] Time Selection and Trimming Midi Loops
>>
>>
>>> Maybe this is obvious to you, but I just now got it.
>>> I have a midi loop that is 2 beats too long, so it loops with a silent
>>> gat at the end.
>>> I pressed the home key; and hear 1 measure, 1 beat.
>>> I pressed the end key; and hear 9 measure 2 beat, which is the end of
>>> the item.
>>> I can estimate the silent gap was those 2 extra beats.
>>> I pressed home and set beginning of loop with alt+left bracket.
>>> I pressed end and again hear 9 measure 2 beats.
>>> I hold shift and press page up twice to back up 2 beats; so I'm now at
>>> 9 measures.
>>> I press alt+right bracket to set end of loop.
>>> When I play the loop with looping set with ctrl+R; it loops perfectly,
>>> so the extra 2 measures are excluded from the time selection, but they
>>> are still included in the item, just not selected.
>>> How to trim off the extra 2 beats after the 9 measure loop:
>>> I press shift+S to split the item into 2 items.
>>> Now I have 2 items, the first item with my 9 measure loop, the second
>>> item with the silent 2 measures.
>>> While on the selected track, I press ctrl+right arrow once and hear
>>> the first item announced.
>>> I press ctrl+right arrow again and hear the second item announced.
>>> I press delete and the second item is deleted.
>>> I save the project with the now perfect 9 measure loop.
>>>
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>>
>>
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