(Using True RTA's Quick Sweep feature is easier than using pink noise, but I find it unreliable.)
You can now see which bass frequencies are giving you problems. If you're focusing on bass, turn the high-frequency limit for the graph down to 500 Hz. Save the graph by going to View/Save to Memory. Hit the Stop button and you'll see the frequency response for your system. Now click the Go button to activate the analyzer. You should hear noise coming from the speakers.
#TRUERTA HAS STOPPED WORKING GENERATOR#
Select the pink noise generator in TrueRTA, then click the On/Off button. Position the microphone so that it's in the same place your head would be when you're seated. The basic procedure for one-seat measurement is simple. However, if you want to get the SPL readings in the ballpark, just play a test tone, place a RadioShack or other brand SPL meter next to the measurement mike, and enter the SPL reading in decibels into True RTA.
SPL isn't critical here, because you only care how loud one frequency is relative to another, not how loud they are on an absolute basis. You may also want to calibrate True RTA's sound-pressure level (SPL) reading. You also have to calibrate True RTA to cancel out any flaws in your computer's internal sound card. I will warn you, though, that before using it, you have to load a microphone calibration file - either the one that came with your mike or the generic ECM-8000 file provided with the software. There's no need for me to detail True RTA's operation when you can read about it in the User's Guide. If you want to make the sound good in every seat, you'll have to run a measurement in every seat, then average the measurements. The first decision you have to make when measuring your audio system is: Do you care about the quality of the sound your entire family hears, or do you only care about the sound you hear? While the latter stance might seem selfish, it's simpler because you only have to make measurements from your favorite seat.