Re: [linux-audio-dev] looped samples .. Was: extending LADSPA, it's not that easy ......

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Subject: Re: [linux-audio-dev] looped samples .. Was: extending LADSPA, it's not that easy ......
From: David Olofson (david_AT_gardena.net)
Date: Sat Nov 04 2000 - 11:30:37 EET


On Sun, 29 Oct 2000, Paul Barton-Davis wrote:
> >splice. It is difficult and sometimes impossible to identify begin and
> >end points that match perfectly and conform to the desired loop length,
> >so a standard sample edit feature is to use a small amount after the end
> >point for fade out, and an equally sized amount before the begin point
> >for fade in (though this would increase the loop length. Probably a
> >better method would to use an equally sized amount starting at the loop
> >begin point). This avoids the abruptness of a raw butt splice and makes
> >loop editing much easier.
>
> have you checked out the loop editor in Bias Peak (i think thats where
> i saw it, though it could have been CoolEdit). its exceptionally cool,
> presenting the end section of a loop in the left hand-side of a
> window, and the beginning section on the right. a dividing line down
> the middle allows you to drag the start and/or end point forward or
> backward in time, and you can watch the waveforms line up, or not.

Recent versions of SoundForge has something like this as well; SF
calls it "Loop Tuner".

> i think they have a facility to apply a fade to one or both of the two
> sections so as to get a perfect zero-crossing splice. if they don't
> they should and you can guarantee that the version of this idea that
> gets done for sweep and ardour will include this.

There is a tool for this in SoundForge as well, but unfortunately
it's not integrated with the Loop Tuner... :-(

> unless, of course, BIAS have patented the interface :)
>
> --p

-- 
//David

.- M u C o S -------------------------. .- David Olofson --------. | A Free/Open Source | | Audio Hacker | | Plugin and Integration Standard | | Linux Advocate | | for | | Open Source Advocate | | Professional and Consumer | | Singer | | Multimedia | | Songwriter | `-----> http://www.linuxdj.com/mucos -' `---> david_AT_linuxdj.com -'


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