Sound Correction, Where to start first?

[o0OBillO0o]

Are there any known room sizes and speaker pairings?

Is there a room size calculator for speakers we have?

[Mr_Sukebe]

I'm a user of active and passive room correction.

I have a pair of GIK in the corners behind my speakers and use the DSP capability in my Meridian processor.

My views are that:
- As already stated, the room can have a huge impact. I've lived in an apartment, 1st floor with wooden floor. AWFUL place, as the floor captured the base and threw it all over the place back and me (and my downstairs neighbour. Also had an apartment with brilliant acoustics as the rear wall was curved and did a lovely job of bouncing around bass reflections
In the majority of rooms, you'll suffer from bass nodes due to reflections between the walls due to the length of the room. As a Brit, I have a small listening room and suffer from a 15db "hump" at 40hz, as that's it's resonant frequency
- I found the GIKs completey incapable of damping out the 15db hump. You'll struggle to find any passive solution capable of that, particularly in such a narrow frequency bandwidth. For all that, the GIKs did manage to kill some spurious rear reflections and are well recommended
- For active room correction, first thing is to measure and understand. I ended up using REW (which is free) and a Umik-1 USB mic (dirt cheap). Using those gave VERY fast measurements, meaning that it was easy to experiment. As mentioned, the solution I used was the functionality of my AV processor. There are however many other methods, e.g. use the processing capability of say a laptop/PC (using say REW correction facilities), mini-dsp DACs (which use DIRAC software). The choice is really dependant upon your sources. If you use vinyl, you're got a spot of bother, as all the DSP solutions require a digital signal to work with. High CDPs also present a problem, because you're introducing a requirement to "fiddle" with the digital output, meaning that you can't rely on the internal DAC unless it has a digital input. The implications being that persons using streamers just happen to have the most options.