GAudio.GATSoundBank.GetMidiCodes C# (CSharp) Method

        public void GetMidiCodes( int offset, int fftSize = 4096, int maxFreq = 5000 )
        {
            AudioClip clip;
            float[] real, im, window;
            FloatFFT fft;
            string assetPath;
            float binWidth;
            List< FFTBinInfo > binInfos;
            int i;

            real = new float[ fftSize ];
            im   = new float[ fftSize ];
            window = new float[ fftSize ];

            GATMaths.MakeHammingWindow( window );

            fft = new FloatFFT();
            fft.init( ( uint )Mathf.Log ( fftSize, 2 ) );
            binWidth = ( float )_sampleRate / fftSize;

            int maxBin = ( int )( ( float )maxFreq / binWidth );

            foreach( GATSampleInfo info in _sampleInfos )
            {
                assetPath = AssetDatabase.GUIDToAssetPath( info.GUID );
                clip = AssetDatabase.LoadAssetAtPath( assetPath, typeof( AudioClip ) ) as AudioClip;
                if( clip.channels > 1 )
                {
                    throw new GATException( "Get Midi Codes is a beta feature only available for mono clips" );
                }
                clip.GetData( real, offset );
                System.Array.Clear( im, 0, im.Length );
                fft.run( real, im );

                for( i = 0; i < maxBin; i++ )
                {
                    real[ i ] = Mathf.Sqrt( real[ i ] * real[ i ] + im[ i ] * im[ i ] );
                }

                binInfos = FFTBinInfo.GetLowerMaxBins( real, 0, maxBin, binWidth, .2f );

                info.MidiCode = binInfos[ binInfos.Count - 1 ].GetMidiCode();
            }

            SortByMidiCode();
        }