Okay, so in Logic Pro I can load up a Space Designer plugin (convolution reverb) with an impulse that's 9.1 seconds long, turn my mic on, and get real-time convolution reverb as the mic records incoming audio.

My question is... how the hell is this possible? My I/O buffer size is 32 samples... am I supposed to believe that my computer is capable of performing the convolution of a 401,310 sample impulse with a 32 sample block of audio in under 0.0007 seconds? If so, what kind of black magic do I need to get my own convolution reverb to do this?

I should mention I am trying to develop real time convolution in C with portaudio... it works great when it's not real-time, but it's way too slow in real-time (the convolution I mentioned above takes 0.8 seconds using frequency-domain convolution which is supposed to be faster for impulses of that size, no?

Anyway any insight would be helpful, as I would really like to understand how this kind of real-time processing is possible.

Okay, so in Logic Pro I can load up a Space Designer plugin (convolution reverb) with an impulse that's 9.1 seconds long, turn my mic on, and get real-time convolution reverb as the mic records incoming audio.

My question is: How could this be possible? My I/O buffer size is 32 samples. Is my computer capable of performing the convolution of a 401,310 sample impulse with a 32 sample block of audio in under 0.0007 seconds? If so, what kind of black magic do I need to get my own convolution reverb to do this?

I should mention that I am trying to develop real time convolution in C with portaudio. It works great when it's not real-time, but it's way too slow in real-time (the convolution I mentioned above takes 0.8 seconds using frequency-domain convolution which is supposed to be faster for impulses of that size, no?

Anyway any insight would be helpful, as I would really like to understand how this kind of real-time processing is possible.