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Impulse Response Files for FIR Filters
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March 27, 2014
10:33 pm
Forum Posts: 13
Member Since:
August 27, 2013
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Hi Will,


I've been going through the FIR section in your book and found where RackAFX lets you generate impulse response files. This is cool. So I went into RackAFX and generated the file and to my surprise the output is very proprietary. Why not just have the numbers without all the text? I realize now that you do not parse the file, but inject it straight into your code somehow.

I was hoping the file generated by RackAFX was in some sort of known format for IR files.


Do you know of a standardized format? Which programs would generate these files?



March 28, 2014
8:31 pm
W Pirkle
Forum Posts: 187
Member Since:
January 29, 2017
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Hey Marko


When you save IRs in RackAFX it saves them in the "proprietary" .SIR format (Socket Impulse Response) which is just a text file where you can cut-and-paste the IR array directly as C++ code in your plug-in. However, it also saves your IR as a standard WAV file too with the same name.wav; go to the IR1024 folder (in the RackAFX Data folder) and you will find the IR files in pairs .SIR and .WAV - this way, you can export any RAFX generated IR as a .WAV and load it into other IR convolution devices.


Also, when you view files in the IR Files pane in the Analyzer Dialog, you get a mix of both SIR and WAV files. Double-clicking on any of these files when in the Convolver plug-in will automatically load them.


- Will


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