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Sine-Swept Impulse Response

Posted: Sat Apr 01, 2017 9:54 pm
by GraysonPeddie
In Ardour, I've recorded a sine sweep that is routed through my TC Electronics M-One XL and back into Ardour which I've recorded two samples of IR (large and x-large).

When I put IR in a kick drum in Harrison Mixbus, it plays a sine sweep per kick and not similar to a real reverb from an M-One. I couldn't figure out how to tell IR-LV2 that it's a sine-sweep, so what other plugins can I use?

And out of all the weird names for Guitarix LV2 plugins such as GxGuvnor and GxHotbox or whatever it is, I cannot find Guitarix's IR plugin.

Update: I also tried LSP IR Stereo LV2 and I couldn't figure out how to tell it that it is a sine sweep with reverb in it.

Re: Sine-Swept Impulse Response

Posted: Sun Apr 02, 2017 1:30 am
by tramp
GraysonPeddie wrote:And out of all the weird names for Guitarix LV2 plugins such as GxGuvnor and GxHotbox or whatever it is, I cannot find Guitarix's IR plugin.
And you can't, because there isn't. We've never released our Convolver plugin as LV2 plug.
Beside the "wired" names, I could help you out for the given examples:
GxGuvnor : https://www.youtube.com/watch?v=P9sPkN6uRa0
GxHotBox: https://www.youtube.com/watch?v=QVldkZcH21Q
GraysonPeddie wrote:Update: I also tried LSP IR Stereo LV2 and I couldn't figure out how to tell it that it is a sine sweep with reverb in it.
Again, you can't. You need to perform a deconvolution on your recorded sine sweep in order to archive the Impulse Response.
One app to archive that will be Alikki : http://kokkinizita.linuxaudio.org/linux ... manual.pdf

Re: Sine-Swept Impulse Response

Posted: Mon Apr 03, 2017 1:55 am
by tramp
tramp wrote:You need to perform a deconvolution on your recorded sine sweep in order to archive the Impulse Response.
Here is a other deconvolver, which might be more suited for your needs:
https://sourceforge.net/projects/deconvolv/

It's a windows project, but it's gpl and build fine on linux as well.
Build is simple with:

Code: Select all

gcc -o deconvolver deconvolv.c -lm
usage is similar simple:

deconvolver d /path/to/recorded_file /path/to/sine_swept_file IR.file

the resulting IR.file could then be loaded by the convolver of your choice and contain the reverb only.

Re: Sine-Swept Impulse Response

Posted: Mon Apr 03, 2017 2:31 am
by GraysonPeddie
Thanks.