Did some tests to see if I can record the engine sounds through a laptop (using a microphone mounted on the intake) while driving so I can listen for knock (through the speakers) and later on analyze the knock frequency of the engine. Good thing is it works you can hear all the engine sounds but its a bit noisy. I obtained a BMW knock sensor and when I have time I'll mounted it on the block and see if I can get a clearer sound from it, later I intend to link it to the megasquirt and have it pull timing if there is knock. To actually setup the knock sensor I indend to introduce knock at low load and setup megasquirt to trigger I'll also record it in order to see at what frequency it's for this engine.
Here are two pictures of the spectrum analyzer for normal driving and wot run (no knock in this pictures).
normal driving
wot
