Rane THX Room EQ - Manual (Page 9)

Home THX Equalization Manual Rev. 1.5
9
Set the measurement time to a minimum of 20 seconds.
F-4 , F-2
Begin the multiplexing operation. F-1 , F-5
1.4) Real-Time Analysis:
• Begin with the Center Channel
• Start your pink noise source. F-7 If using “Wow!” Chapters 9, put the appropriate track on A-B
repeat so that it conveniently cycles automatically. (Note: “Wow!” pink noise chapters will allow for
a maximum measurement interval of 20 seconds, so when using “Wow!” as a noise source the
minimum and maximum measurement intervals are the same.)
• Begin your measurement interval. F-8 IF USING “WOW!” AS THE SOURCE, BE SURE
THAT YOU BEGIN THE INTERVAL IMMEDIATELY AFTER THE CHAPTER HAS REPEATED!
Any blank spot during the measurement interval will corrupt the data.
• Analyze your spatially and temporally averaged data.
NOTE: DISPERSION AND AIR ABSORPTION AT HIGHER FREQUENCIES WILL CAUSE A
GENTLE ROLL OFF IN RESPONSE BEGINNING AROUND
6 kHz. THIS IS NORMAL AND DOES
NOT REQUIRE EQUALIZATION. (Fig. 3)
Typical Unequalized LCR Room Response
Frequency Hz
dB
SPL
60
65
70
75
25 40 63 100 160 250 400 630 1000 1600 2500 4000 6300 10000 16000
Fig 3