Time-stretching with PaulStretch
August 17, 2010 3:32 PM
posted by cortex (31 comments total)
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So this thread on the blue about slowed-down Bieber
led me to PaulStretch
, which is a fairly aggressive piece of (open source!) audio time-stretching software. It's neat, and is (on Windows, at least) super easy to play with.
I think it'd be neat to have more "here is a cool toy, have at it" threads over here, and so here's one of them.
I've been fucking around with PaulStretch all day and having a ball—it's basically, at the default settings, an Instant Ambient Music Generator (insert 3 minute pop song, get 24 minute ethereal meditation or horror ride, depending on the content). I put together a sort of ear-test quiz of some pop music over here
as an example of some of what it does to stuff, if you want to dip your toes in.
But it's pretty tweakable. The 8x slowdown is just a default setting, and the degree of audio "smear" it produces is also adjustable, and there's a number of stretching algorithms that, again, I haven't really tried tweaking.
So I'm seeing this as potentially useful as a creative tool, aside from just the novelty of slowing down existing songs—I'm thinking for example of intentionally recording a short instrumental loop in real time and then stretching it out to create a very ghostly sort of backing track to then use as the harmonic base for a song. But I'm curious what other people can see doing with this, or with related tools.