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LS9 iEQ is an FFT Audio Analyser that features oscilloscope, FFT, Sonogram and 1/3 Octave RTA views. In RTA mode, a 31 band graphic EQ is displayed, along with the 1/3 Octave bargraph display. The GEQ can control the internal GEQs of the Yamaha LS9 series of consoles, and also the Behringer DEQ 2496 EQ via MIDI over WiFi.
Pink noise is fed through the sound system, the GEQ in the App is adjusted to make the auditorium 'flat' EQ-wise. Or the App can do this for you automatically by pressing the 'Auto EQ' button.

To use LS9 iEQ, you must either have the free UMMU Server App installed on the host computer, or you can use the StrongSoft® UMMU Box