Keeping 2 audio files in perfect sync

[Andrew Robinson]

If I can do this with sample accuracy, it sounds ideal! 30 day trial of
live downloading now...

Thanks Gert!

- Andy_R

On 14 November 2014 14:27, Gert van Santen <g.vansanten at upcmail.nl> wrote:

> Andrew Robinson schreef op 14-11-2014 15:17:
>
>  A bit of an odd question, but someone might have an idea about
>> how to do this...
>>
>> I've got 2 high res (24bit 96Khz) files. They are the vocal and
>> instrumental versions of a classic 80s pop song. I'm fiddling
>> about with my own remix, and I'd love to do the 'subtract one for
>> the other to get an acapella' trick. This usually works really
>> well on digital files, especially when the mixes are otherwise
>> identical as these are. The problem with these ones is that they
>> are not quite digitally identical, but have each been through an
>> analogue tape stage, which has introduced a *tiny* bit of speed
>> instability, inaudible, but enough to make digital subtraction a
>> nightmare as the files drift away from each other by up to about
>> 50 samples per bar. I can match up .2 to .5 second bits perfectly
>> and get a tiny snippet of crystal clear acapella, but what I
>> really need is a way of either automatically phase-locking the
>> files, making almost imperceptible pitch bends, or automating
>> very very short delay changes.
>>
>> Logic Pro is frustratingly hopeless at this, it provides a sample
>> accurate delay plug in, with sample accurate automation on the
>> delay times... but the automation can only be set in massive
>> clunky increments, and I can't find any way at all to adjust it
>> precisely.
>>
>> Any ideas, folks?
>>
>> - Andy_R
>>
>
> Hm, I think Ableton Live will be able to do this quite well. You can set
> markers anywhere in an audiofile and get great results. I have done this a
> couple of times myself with audio.
>
> But...
> 1. Perhaps you don't have Live.
> 2. Perhaps this still isn't exactly what you are looking for...
>
> Cheers,
>
> --
> Gert
>
> gert van santen
> www.gertvansanten.nl
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