Room set up

You are going to have to give us a little more info, bro.

oh, ok. I am only using a dvd player straight to a 7 channel amp. 4 subs{1 in each corner plus a LFE sub in a 5.1 set-up in a 18x22 ft.room.Thanks,Rick

Audisey is usually in a receiver.

You could roll your own using something like an 8 channel miniDSP unit...

https://www.minidsp.com/

Or one with built-in Dirac Live.

Best,

E

Thanks bud, I will look this up. I am just geeting a boom sometimes and fronts not balanced with center or rears.

You need software and hardware to do this.  You to have some kind of unit in between the source and the amp to accomplish this.  Usually that is an HT receiver. Audissey is an integrated software/hardware package built into some receivers with digital signal processing capability, using a microphone to measure in-room response and the DSP capability to vary the levels (and perhaps timing) of the different channels and also to equalize the LFE signal to account for room acoustics. You would have to be pretty handy w computers and DSP programs to do this on your own, but I imagine it's possible to insert a computer with some kind of signal generator, real time analyzer software, a calibrated microphone, multi-channel DSP program, and multi-channel DACs and DIY it.  Makes my head hurt to think about the number of iterations it would take to make 8 channels sound good...yikes!