demo can use to analiyse spectrum of audio that get from audio jack。

AudioSpectrum-master
....................\AudioSpectrum.xcodeproj
....................\.......................\project.pbxproj
....................\.......................\project.xcworkspace
....................\.......................\...................\contents.xcworkspacedata
....................\.......................\xcuserdata
....................\.......................\..........\keijiro.xcuserdatad
....................\.......................\..........\...................\xcschemes
....................\.......................\..........\...................\.........\AudioSpectrum.xcscheme
....................\.......................\..........\...................\.........\xcschememanagement.plist
....................\AudioSpectrum
....................\.............\AudioInputHandler.h
....................\.............\AudioInputHandler.m
....................\.............\AudioRingBuffer.h
....................\.............\AudioRingBuffer.m
....................\.............\AudioSpectrum-Info.plist
....................\.............\AudioSpectrum-Prefix.pch
....................\.............\AudioSpectrumAppDelegate.h
....................\.............\AudioSpectrumAppDelegate.m
....................\.............\Base.lproj
....................\.............\..........\MainMenu.xib
....................\.............\Images.xcassets
....................\.............\...............\AppIcon.appiconset
....................\.............\...............\..................\Contents.json
....................\.............\SpectrumAnalyzer.h
....................\.............\SpectrumAnalyzer.m
....................\.............\SpectrumView.h
....................\.............\SpectrumView.m
....................\.............\en.lproj
....................\.............\........\Credits.rtf
....................\.............\........\InfoPlist.strings
....................\.............\main.m
....................\README.md

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