Hello. I was wondering if anyone knows how I might be able to create a set of impulse files based on mathematical equations. I was looking at this headphone amplifier project - Jan Meier. The equations for his crossfeed filter are in the project. I was hoping to simulate the effects of this filter with various values. Figured the best way would be to create a pair of impulse files which I could use with the convolution feature in Cool Edit Pro. Not terribly clear on how to actually apply the impulses though. Maybe take the stereo audio, apply the first stereo impulse, and mix to mono - that would be one channel. Then repeat the process with the impulse channels reversed to get the other channel. Sound good? Thanks for any help!

The method you describe should work. [edit]Using a proxy the link works. It seems like this amp is doing pretty much the same as crossfeed DSP plugin for foobar2000 or winamp is doing. You might want to give it a try. By using diskwriter and a .wav containing a dirac impulse, you can "rip" the IRs from it so you can analyse with CEP what it does.[/edit]

For working with CoolEdit and impulse responses you might want to give Aurora a try. The free test version causes CE to crash once in a while (purpously), but for playing a bit it works good enough.

Hello. The problem is that I don't have the physical circuit. That is why I wanted to simulate it. So I could determine which values would be ideal for my personal tastes. Without having to buy a huge variety of parts. The final product will not be connected to a computer, so the crossfeed has to be implemented in the analog domain. Having determined the correct part values, I can then design the PCB to accomodate their physical dimensions. The size of the polypropylene caps differs quite a bit based on value. I have never heard of Aurora. A little hard to find their homepage, but I got it. It is not immediately clear to me if I can synthetically create impulse files with this. But it does seem to support four channel impulses, which makes the "stereo in stereo out" crossfeed process a lot easier.