Originally Posted by John_M
Will be interesting to hear what it sounds like on the Realiser. :)
When you complete a PRIR measurement done properly, the final step is normally an A-B comparison (with the headtracker active, in order to facilitate the easy on/off of sound through either the headphones or the speakers) where you first put the headphones on while listening to Realiser-generated "solo" WAV sound from each speaker individually, and then take the headphones off while tilting them down so that the headtracker mutes the headphones and sends the same sound to the real speakers.
This technique allows you to verify two things:
(1) you should have correct "virtual horizontal, vertical, and angular localization" for each virtual speaker heard through the headphones which should be essentially identical to what your ears hear and brain processes, when listening to the same sound without headphones to each speaker itself. The virtual distance to the virtual speaker through the headphones should appear to be the same as the actual distance of each speaker to you at your seated location.
(2) the actual tonal sound while listening to the "solo" sound through each virtual speaker using the headphones should also duplicate the tonal sound of each of the actual speakers as you "solo" around through each speaker.
If you are capturing a true 5.1 or 7.1 loudspeaker sound system, then the "solo" process for A-B comparison is very easy, and also usually very startling and impressive. In fact inevitably it's almost laughable how if the process starts with the headphones still on your head, you will almost invariably ask "Ok, am I listening to the headphones or the speakers now??". It typically sounds so "real" that you are usually in disbelief that what you're listening to IS from the headphones and not from the actual loudspeakers themselves. With the Stax headphones being "open" so that ambient room sound can leak in, it's easy for your brain to believe you're hearing the actual speakers coming through the headphones, whereas in fact the speakers are off and you're hearing the sound from the headphones themselves. The sound is seemingly tonally identical, and also virtually "placed in space" by your brain exactly where the loudspeakers are arrayed around you.
If you are creating a simulated 5.1 or 7.1 setup with only one or two speakers (and rotating your chair position to simulate different listening angles for a surround setup) it's obviously not going to be possible to easily or impressively complete the A-B comparison test as it would be when comparing to a true surround speaker setup in the room.
NOTE: you must also take one HPEQ measurement to quantify the headphone equipment itself while on your ears, to complete the requirements for Realiser use no matter which one or more PRIR files (for different listening environments) you accumulate and want to listen "through". To listen to anything it's HPEQ+PRIR(1), or HPEQ+PRIR(2), etc., with HPEQ describing THAT PARTICULAR HEADPHONE/AMP/DAC output equipment path which delivers the processed output sound from the Realiser to your ears via headphone-output path (either using the Realiser's own built-in headphone output or the Realiser's optical output to an external DAC and then on to the headphone amp).