Hello
I want to get rid of PA microphones in front of my cab. My rig has a class D Poweramp, so I can use the input signal of that amp as a line out, through a impulse loader pedal.
As far as I understand I have to feed an impulse signal to the Poweramp, record the output of the cab. Compare input and output with a convolution plug in, making a impulse response file, which I can load in to my IR loader. Questions:
What impulse signal gives the best, dynamic result. I can imagine that a sine sweep is good to make a freq response/equalisation. But isn’t it better to use a very short burst of noise to nail the dynamic response. Educated guess: block wave 20 Hz (one or two cycles) contains all frequencies, is that suitable?
What plug in is easy to use and gives good results?
I know there is more to it than my short abstract, like normalizing, synchronizing, etc, mic placement, room influences etc
Hi Steve,
Thank you for your reply!
What do you mean with up-down pulse, is that a block wave at half the sample freq ?
To test an amplifier I use a block wave of somewhere around 400 Hz, but also lower and higher freq. Gives a good impression of the freq response. Have you ever tried a low freq block wave?
I read that some people simply touch a 9 volt battery with the leads of the speaker. I think that is approximately the same as a low freq block wave (?)