215 lines
7.2 KiB
Java
215 lines
7.2 KiB
Java
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import java.io.*;
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public class parsefreq
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{
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public parsefreq(){}
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public static void main (String [] args)
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{
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String freqFile = "ataripitch.txt";
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try
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{
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BufferedReader reader = new BufferedReader(new FileReader(freqFile));
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/*******************************************************
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* read each frequency and distortion from freqFile *
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* *
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* 0 Saw MIDI note 85 (Lead 5 Charang) *
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* 1 Engine MIDI note 85 *
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* 2 Square MIDI note 80 (Lead 1 Square) *
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* 3 Bass MIDI note 81 (Lead 2 Sawtooth) *
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* 4 Noise MIDI note 85 *
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* 5 Lead MIDI note 81 (Lead 2 Sawtooth) *
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* 6 Buzz MIDI note 85 *
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* *
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********************************************************/
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String line;
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while ((line = reader.readLine()) != null)
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{
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int bracket = line.indexOf("]");
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int d = Integer.parseInt(line.substring(1,bracket));
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int atariNoteIndex = Integer.parseInt(line.substring(bracket+2,line.indexOf("]",bracket+1)));
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int midiVoice = 0; //indexed from 0
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String dist = "";
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switch (d)
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{
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case 0: midiVoice = 84; dist = "saw"; break;
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case 1: midiVoice = 84; dist = "engine"; break;
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case 2: midiVoice = 80; dist = "square"; break;
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case 3: midiVoice = 81; dist = "bass"; break;
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case 4: midiVoice = 84; dist = "noise"; break;
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case 5: midiVoice = 80; dist = "lead"; break;
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case 6: midiVoice = 84; dist = "buzz"; break;
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}
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double freq = Double.parseDouble(line.substring(line.indexOf(",")+1,line.lastIndexOf(",")));
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//A440 = 69
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//middle C = 60
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double unroundedNoteIndex = (12*Math.log(freq/13.75)*1.442695)+9; //= 12 * log_base_2(freq/13.75) + 9
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int roundedNoteIndex = (int)Math.round(unroundedNoteIndex);
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String noteName = "";
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switch(roundedNoteIndex%12)
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{
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case 0: noteName = "C"; break;
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case 1: noteName = "C+"; break;
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case 2: noteName = "D"; break;
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case 3: noteName = "D+"; break;
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case 4: noteName = "E"; break;
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case 5: noteName = "F"; break;
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case 6: noteName = "F+"; break;
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case 7: noteName = "G"; break;
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case 8: noteName = "G+"; break;
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case 9: noteName = "A"; break;
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case 10: noteName = "A+"; break;
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case 11: noteName = "B"; break;
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}
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int octave = roundedNoteIndex/12-1;
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noteName += Integer.toString(octave);
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//total pitch bend is from 0-16383
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//values below 8192 bend flat, values above 8192 bend sharp
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double valuesPerCent = 40.96; //= 8192/200
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//example: 75 cents sharp = 40.96(75) = 3072+8192
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double errorInCents = Math.round(100.0*(unroundedNoteIndex-(double)roundedNoteIndex));
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int value = 8192+(int)(errorInCents*valuesPerCent);
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int bits_r = (value/8192)*64+((value%8192)/4096)*32+((value%4096)/2048)*16+((value%2048)/1024)*8+((value%1024)/512)*4+((value%512)/256)*2+((value%256)/128);
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int bits_l = value%128;
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//---------------------------------------//
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String midiFile = "midi/"+dist+"_"+atariNoteIndex+"_"+noteName+"_"+octave+"_"+freq+"_"+(int)errorInCents+"_"+roundedNoteIndex+"_"+bits_l+"_"+bits_r+".mid";
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//write to new MIDI file
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FileOutputStream outputStream = new FileOutputStream(midiFile);
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//----------HEADER-----------//
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outputStream.write(77); //M
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outputStream.write(84); //T
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outputStream.write(104); //h
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outputStream.write(100); //d
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outputStream.write(0); //
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outputStream.write(0); //
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//Size of header
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outputStream.write(0); //
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outputStream.write(6); //Size is 6 bytes
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//MIDI file format
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outputStream.write(0); //
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outputStream.write(1); //MIDI type 1 (multiple tracks)
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//# of tracks
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outputStream.write(0); //
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outputStream.write(2); //2 tracks
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//Time division
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outputStream.write(00); //
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outputStream.write(240); //240 ticks per beat
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//-------END HEADER---------//
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//--------TRACK DATA--------//
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//Header
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outputStream.write(77); //M
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outputStream.write(84); //T
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outputStream.write(114); //r
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outputStream.write(107); //k
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//# of bytes in track data
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outputStream.write(0); //
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outputStream.write(0); //
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outputStream.write(0); //
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outputStream.write(19); //19 bytes
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//Tempo
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outputStream.write(0); //Delta time
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outputStream.write(255); //Meta event
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outputStream.write(81); //Set tempo
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outputStream.write(3); //Length of data
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outputStream.write(7); //Microseconds per beat (next 3 bytes)
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outputStream.write(161); //
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outputStream.write(32); //
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//Time signature
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outputStream.write(0); //Delta time
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outputStream.write(255); //Meta event
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outputStream.write(88); //Set time signature
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outputStream.write(4); //Length of data
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outputStream.write(4); //Numerator
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outputStream.write(2); //Denominator^2
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outputStream.write(24); //Metronome
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outputStream.write(8); //32nd notes per beat
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//End track
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outputStream.write(0); //Delta time
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outputStream.write(255); //Meta event
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outputStream.write(47); //End track
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outputStream.write(0); //End track
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//------END TRACK DATA-----//
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//--------TRACK DATA--------//
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//Header
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outputStream.write(77); //M
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outputStream.write(84); //T
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outputStream.write(114); //r
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outputStream.write(107); //k
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//# of bytes in track data
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outputStream.write(0); //
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outputStream.write(0); //
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outputStream.write(0); //
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outputStream.write(23); //23 bytes (might be variable)
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//Change voice
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outputStream.write(0); //Delta time
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outputStream.write(192); //Top four bits: change voice; bottom fout bits: channel 0
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outputStream.write(midiVoice); //MIDI voice
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//Change volume
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outputStream.write(0); //Delta time
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outputStream.write(176); //Top four bits: controller event; bottom four bits: channel 0
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outputStream.write(7); //Change volume
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outputStream.write(80); //Volume is set to 80
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//Note on
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outputStream.write(0); //Delta time
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outputStream.write(144); //Top four bits: note on; bottom four bits: channel 0
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outputStream.write(roundedNoteIndex); //MIDI note value (0-127)
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outputStream.write(100); //Velocity
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//Pitch bend
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outputStream.write(0); //Delta time
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outputStream.write(224); //Top four bits: pitch bend; bottom four bits: channel 0
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outputStream.write(bits_l); //pitch bend value
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outputStream.write(bits_r); //pitch bend value
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//Tick delay
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outputStream.write(120); //delay- eighth note (120 ticks)
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//Note off
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outputStream.write(128); //Top four bits: note off; bottom four bits: channel 0
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outputStream.write(roundedNoteIndex); //MIDI note value (0-127)
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outputStream.write(100); //Velocity
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//End track
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outputStream.write(0); //Delta time
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outputStream.write(255); //Meta event
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outputStream.write(47); //End track
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outputStream.write(0); //End track
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//------END TRACK DATA-----//
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outputStream.close();
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}
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}
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catch (IOException e)
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{
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System.out.println(e.getMessage());
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}
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}
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}
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