Yamaha EMX5016CF Owner's Manual - Page 31

Reference Setting the GEQ with the FRC function Setting up GEQ by Music Playback Measurement This explains how to output music playback (such as from a CD player) via channels 15/16, pick up that signal picked from a microphone plugged into channel 1, and measure the frequency characteristics. Sound Source EFFECT1 EFFECT2 FRC Music Playback Measurement ST OUT L R [Block Diagram of Music Playback Measurement] 1 Connect the EMX to a set of speakers. Connect a microphone to channel 1 INPUT A or INPUT B, and place the microphone at the point to be measured. Connect a CD player to channels 15/16. 2 Set up channels 1 and 15/16 as follows, and lower the ST Master fader all the way down. ● Channel 1 Controls [26dB] switch GAIN control switch COMP knob HIGH MID F MID LOW AUX1 knob AUX2 knob EFF1 knob EFF2 knob PAN control ON switch Channel fader Settings Proper level* Proper level* Off 0 0dB - 0dB 0dB - - 0 Nominal " " position Center On -∞ (→ 0dB)* ● Channels 15/16 Controls GAIN control switch HIGH MID LOW AUX1 knob AUX2 knob EFF1 knob EFF2 knob PAN control ON switch Channel fader Settings Proper level* Off 0dB 0dB 0dB - - Nominal " " position 0 Center On -∞ (→ 0dB)* * Adjust these settings in step 4. NOTE • Make sure that all faders other than channels 1 and 15/16 are set to their minimum and that no other signals are input. • Set the POWER AMP switch to L/R. 3 Press and hold the MEASURE/CORRECT switch for three seconds or longer. The indicator begins flashing slowly, and measurement of the frequency characteristics starts. 4 To adjust the playback level of the CD player, turn on the channel 15/16 PFL switch, adjust the GAIN control so that the LEVEL meter 0 flashes occasionally, set the channel faders to the 0dB position, and then adjust the ST Master fader. To adjust the channel 1 input level, turn on the PFL switch, adjust the [26dB] switch and GAIN control so that the LEVEL meter 0 flashes occasionally, and set the channel faders to the 0dB position. 5 The measurement result is updated on the GEQ display every five seconds after measurement starts. 6 Confirm that the measurement result is consistent, and then press the MEASURE/CORRECT switch to suspend the measurement. The result is retained even after suspension. At this time, the GEQ display indications flash. NOTE This step is also handy for altering the location of the speakers and microphone, since the noise output is muted during the suspension. To resume the measurement, press the MEASURE/CORRECT switch again. 7 Turn off the channels 1 and 15/16 ON switches and lower the channel fader all the way down. Leaving the fader up and stopping the measurement in the step below can result in howling. 8 Press the MEASURE/CORRECT switch for two seconds or longer to apply the correction curve to the GEQ according to the frequency characteristics of the measurement result. The MEASURE/CORRECT switch indicator flashes. Also, the GEQ ON switch lights up so that the GEQ is enabled. NOTE To prevent clipping at the power amp stage by excessive equalization, the correction curve is never set over ±6dB. 9 If necessary, and adjust the GEQ settings using the GEQ +/- switches. If you adjust the GEQ settings, the FRC indicator turns off. To restore the correction curve immediately after measurement, press the FRC MEASURE/CORRECT switch again. The indicator lights up. 10 If necessary, store the GEQ settings to a USER switch. EMX5016CF Owner's Manual 31