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Help with a IR Loader

DSP related issues, mathematics, processing and techniques

Help with a IR Loader

Postby regressor18 » Thu Jun 25, 2015 3:57 pm

I got this module on the forums and i know others have tried to get this module to work with a preloaded IR file.

So my end goal is to create a plug that can be used to select different preamps. I have a nice Neve preamp, a vintage Soundcraft board from the early 80s that sound amazing, and a SSL. Id love to model the preamp response using IR and then have a plugin that can be used to pick which one to add to a track.

I have worked on this for the past couple of days and i think its out of my league. Can someone please take a look at this and see if you can figure out why it will not work with a preloaded wave file.

Thanks for the help,
Matt
Attachments
IR Testfile.zip
IR of a test preamp channel
(115.79 KiB) Downloaded 1188 times
IR_Loader.fsm
(182.02 KiB) Downloaded 1181 times
regressor18
 
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Re: Help with a IR Loader

Postby MyCo » Thu Jun 25, 2015 7:31 pm

The schematic expects to reads 2048 points FFT data from the first channel of the wave file (first 2048 samples for real part, then 2048 samples for imaginary part of the FFT). The Wave file is 44100 samples long (not 4096 as required) and both channel contain data, so something doesn't match there.
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Re: Help with a IR Loader

Postby regressor18 » Thu Jun 25, 2015 8:12 pm

MyCo,

THANK YOU!

I got it to work! The IR wave file was the problem. I changed the samples, but that didn't solve the problem. Then i resampled the IR as mono, and sure enough, it worked!

I will also make the changes from 2048 to 44100 in the samples.

Thanks again for your advice,
Matt
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