Capturing Impulses...software, techniques.
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I will be doing a test tomorrow recording impulses through a plate verb and some vintage gear.
Does anyone have any experience with this here ? Should i use a sweep or one sample tick ?Any tips ?
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I've never done vintage gear but for IRs I always use a sweep
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Yes, did a quick reverb sweep in software , using Voxengo Deconvolver.
Do you normalize your sweeps to -0.3 when deconvolving ?Tested a tick with some eq , seems to work somewhat :)
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Can't remember if I use normalization, it's been a while.
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Impulse madness!
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Ouch... You've got some real stuff over there!
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Yes indeed ;)
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:) really nice stuff. Lot of fun ahead :)
LOGIC pro X hides an IR capturer with sweep generator and deconvolver, just right click on app and click on show package content and you'll see it.
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@hisefilo Have you compared this to Deconvolver?
I'm using Deconvolver at the moment, but it makes more unusable files than unusable ones
Dan Korneff - Producer / Mixer / Audio Nerd
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@dustbro what is the problem with deconvolver?
Btw i am using Reaverb in Reaper, makes test tones and does deconvolving. -
@lalalandsynth I have to deconvolve multiple time to get a usable result (without changing any settings).
Sometimes I'll get an unexpected frequency response or ghost echos. -
@dustbro just did an IR long time ago and was good. Couple of tricks to get it working since it's not aimed to final user I guess.
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So how does convolution work with analog gear? I assume you take impulses of every setting (or as many as you can) and then interpolate between them somehow?
That last bit always confused me
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@iamlamprey there is no interpolation. Well there's a couple of model machines out there that take "frames" and apply them in different ways, but convolution is straight(but CPU intensive) maths on a fixed set of numbers (the impulse). So in most situations where the result is dependent on a changing input ( say a desk or a compressor or a tape machine), then convolution is probably not going to help much without first streaming your input(on say frequency or volume) and passing it into multiple convolutions - so expensive and all you did was move the granularity of the interpolation required ( and you still cant have interpolation).
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@Lindon I see, thanks Lindon. I suppose it's better to use it as a base then recreate the "sound" with algos/chains instead? I'd still prefer that route to the whole "LTspice recreating the circuit" thing
sorry for pseudo-derailing
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I am making some sweep impulses of reverbs and then use the Tick method to capture the "Colour" of the unit in question, I have yet to test if that method of capturing the colour is worth doing , I need to do some more experiments.
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@lalalandsynth my experience is that the sweep will capture the colour anyway - your experience may end up different.
HISE Development for hire.
www.channelrobot.com -
@Lindon yes, today i am doing both as a precaution.
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@Lindon actually I meant sweep for time based stuff..reverbs..and tick for comp/eq
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Next up, amps
