iOS how to display in iOS apps the voice pitches when recording a message? -


i working on ios app able record , play recorded message.

i display voice (volume / pitches) when taking. how in ios , display (inside uiview? ). didn t manage find type of example or source code far.

i need help. thank you

apple provides nice sample project recording audio , displaying :

https://developer.apple.com/library/ios/samplecode/speakhere/introduction/intro.html


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