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I also generated a couple impulse response files programmatically: These are mac.wav and bedroom.wav, respectively.įrankly, because of the reverb and background noise in my apartment, these impulse responses are bad but they do show that the process of recording impulse responses should work for actual guitar amps. However, since this amp sim can be used for any nonlinear, time-invariant system, I recorded the response of my computer speakers and desk speakers. Unfortunately, I was unable to get access to a physical guitar amp to record impulse responses. (The first impulse response should be exactly 1 second = 48000 samples into the file.) wav file with a 48 kHz sample rate, exactly 34 seconds long. (Reaper in particular provides sample-accurate horizontal adjustment to audio items.) The mic's output should be recorded, and the responses should be lined up exactly to the input impulses. #USING LIVEPROFESSOR FOR GUITAR AMP SIMS DRIVER#This part is specific to the particular audio recording setup and amp used.Įssentially, a computer should be connected to an audio interface that outputs to the guitar amp's input.Ī mic should be placed by the amp's driver to record its response to the impulses. ![]() Runnning this function will generate 32 impulses of amplitudes 0 dB to -60 dB, separated by 1 second.ġ6 positive impulses come first, then 16 negative impulses. The impulse.py script has a function generate_impulses, which generates a file with impulses of different amplitudes. To simulate a guitar amp (or really, any non-linear, time-invariant system) using dynamic convolution, we just need to feed impulses of varying amplitudes into the amp and record the sound that comes out. Here, hₘ is the impulse response that most closely corresponds to the amplitude of x. It takes a single constant impulse response h, and, given an input signal x with length N, the output is: In essence, "normal" linear convolution simulates LTI (linear, time-invariant) systems. Read the comments at the top of the file for more information on the plugin.
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