c# - using bass library to decode mp3 file -

how can convert mp3 file custom sample data using bass library in c# ? custom means want result in properties example mono , 5000hz! try code before not works!

public float[] readmonofromfile(string filename, int samplerate, int milliseconds, int startmillisecond) {

int totalmilliseconds =      milliseconds <= 0 ? int32.maxvalue : milliseconds + startmillisecond; float[] data = null; //create streams re-sampling int stream = bass.bass_streamcreatefile(filename, 0, 0,      bassflag.bass_stream_decode | bassflag.bass_sample_mono |      bassflag.bass_sample_float); //decode stream if (stream == 0)     throw new exception(bass.bass_errorgetcode().tostring()); int mixerstream = bassmix.bass_mixer_streamcreate(samplerate, 1,      bassflag.bass_stream_decode | bassflag.bass_sample_mono |      bassflag.bass_sample_float); if (mixerstream == 0)     throw new exception(bass.bass_errorgetcode().tostring()); if (bassmix.bass_mixer_streamaddchannel(mixerstream, stream, bassflag.bass_mixer_filter)) {     int buffersize = samplerate * 10 * 4; /*read 10 seconds @ each iteration*/     float[] buffer = new float[buffersize];     list<float[]> chunks = new list<float[]>();     int size = 0;     while ((float) (size)/samplerate*1000 < totalmilliseconds)     {         //get re-sampled/mono data         int bytesread = bass.bass_channelgetdata(mixerstream, buffer, buffersize);         if (bytesread == 0)              break;         float[] chunk = new float[bytesread/4]; //each float contains 4 bytes         array.copy(buffer, chunk, bytesread/4);         chunks.add(chunk);         size += bytesread/4; //size of data     }      if ((float) (size)/samplerate*1000 < (milliseconds + startmillisecond))         return null; /*not enough samples return requested data*/     int start = (int) ((float) startmillisecond*samplerate/1000);     int end = (milliseconds <= 0) ? size :         (int) ((float) (startmillisecond + milliseconds)*samplerate/1000);     data = new float[size];     int index = 0;     /*concatenate*/     foreach (float[] chunk in chunks)     {         array.copy(chunk, 0, data, index, chunk.length);         index += chunk.length;     }     /*select specific part of song*/     if (start != 0 || end != size)     {         float[] temp = new float[end - start];         array.copy(data, start, temp, 0, end - start);         data = temp;     } } else     throw new exception(bass.bass_errorgetcode().tostring()); return data; } 

i called function this:

float[] pcm = readmonofromfile(path.getfullpath("1.mp3"), 0, 0, 0);

but in throws exception :the type initializer 'un4seen.bass.bass' threw exception.

add bass.dll bin folder.