What’s the function of RTA in a digital mixer（M20）?

RTA=Real Time Analyzer

It visually shows which frequencies are louder or quieter, and is used to:

• Check sound balance

• Identify feedback and resonant frequencies

• Assist with EQ adjustment

• Measure room acoustics

RTA is like a "sound check-up form" on the audio mixer. It lets you "see" sound with your eyes, instead of just listening with your ears.

When we usually adjust speakers or microphones, we often can’t get it right just by listening — for example, you feel the sound is muffled, but you don’t know where the muffling is; you think the sound is sharp, but you can’t find the exact problem. RTA solves this trouble. It’s like giving the sound a "check-up", turning the invisible and intangible sound into something you can see directly.

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