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| unit Unit1;
interface
uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls, MMSystem, ComCtrls;
type TMIDIInstrument = (midiAcousticGrandPiano, midiBrightAcousticPiano, midiElectricGrandPiano, midiHonkyTonkPiano, midiRhodesPiano, midiChorusedPiano, midiHarpsichord, midiClavinet, midiCelesta, midiGlockenspiel, midiMusicBox, midiVibraphone, midiMarimba, midiXylophone, midiTubularBells, midiDulcimer, midiHammondOrgan, midiPercussiveOrgan, midiRockOrgan, midiChurchOrgan, midiReedOrgan, midiAccordion, midiHarmonica, midiTangoAccordion, midiAcousticGuitarNylon, midiAcousticGuitarSteel, midiElectricGuitarJazz, midiElectricGuitarClean, midiElectricGuitarMuted, midiOverdrivenGuitar, midiDistortionGuitar, midiGuitarHarmonics, midiAcousticBass, midiElectricBassFinger, midiElectricBassPick, midiFretlessBass, midiSlapBass1, midiSlapBass2, midiSynthBass1, midiSynthBass2, midiViolin, midiViola, midiCello, midiContrabass, midiTremoloStrings, midiPizzicatoStrings, midiOrchestralHarp, midiTimpani, midiStringEnsemble1, midiStringEnsemble2, midiSynthStrings1, midiSynthStrings2, midiChoirAahs, midiVoiceOohs, midiSynthVoice, midiOrchestraHit, midiTrumpet, midiTrombone, midiTuba, midiMutedTrumpet, midiFrenchHorn, midiBrassSection, midiSynthBrass1, midiSynthBrass2, midiSopranoSax, midiAltoSax, midiTenorSax, midiBaritoneSax, midiOboe, midiEnglishHorn, midiBassoon, midiClarinet, midiPiccolo, midiFlute, midiRecorder, midiPanFlute, midiBottleBlow, midiShakuhachi, midiWhistle, midiOcarina, midiLead1Square, midiLead2Sawtooth, midiLead3CalliopeLead, midiLead4ChiffLead, midiLead5Charang, midiLead6Voice, midiLead7Fifths, midiLead8BrassLead, midiPad1NewAge, midiPad2Warm, midiPad3Polysynth, midiPad4Choir, midiPad5Bowed, midiPad6Metallic, midiPad7Halo, midiPad8Sweep, midiEmpty0, midiEmpty1, midiEmpty2, midiEmpty3, midiEmpty4, midiEmpty5, midiEmpty6, midiEmpty7, midiEmpty8, midiEmpty9, midiEmpty10, midiEmpty11, midiEmpty12, midiEmpty13, midiEmpty14, midiEmpty15, midiEmpty16, midiEmpty17, midiEmpty18, midiEmpty19, midiEmpty20, midiEmpty21, midiEmpty22, midiEmpty23, midiGuitarFretNoise, midiBreathNoise, midiSeashore, midiBirdTweet, midiTelephoneRing, midiHelicopter, midiApplause, midiGunshot);
type TForm1 = class(TForm) Button10: TButton; Button33: TButton; Button41: TButton; Button42: TButton; Button43: TButton; Button44: TButton; TrackBar1: TTrackBar; ComboBox1: TComboBox; procedure Button10Click(Sender: TObject); procedure FormCreate(Sender: TObject); procedure Button33Click(Sender: TObject); procedure Button41Click(Sender: TObject); procedure Button42Click(Sender: TObject); procedure Button43Click(Sender: TObject);
private public procedure GetMidiVolume(var volLe, volRi: Word); procedure SetMidiVolume(var volLe, volRi: Word); end;
var Form1: TForm1; mo: HMIDIOUT; volLe, volRi: Word;
const MIDI_NOTE_ON = $90; MIDI_NOTE_OFF = $80; MIDI_CHANGE_INSTRUMENT = $C0;
MAX_VOLUME = 65535; HALF_VOLUME = 32768; MIN_VOLUME = 0; FADE_SPEED = 64;
implementation
{$R *.dfm} function MIDIEncodeMessage(Msg, Param1, Param2: byte): integer; begin result := Msg + (Param1 shl 8) + (Param2 shl 16); end;
procedure NoteOn(NewNote, NewIntensity: byte); begin midiOutShortMsg(mo, MIDIEncodeMessage(MIDI_NOTE_ON, NewNote, NewIntensity)); end;
procedure NoteOff(NewNote, NewIntensity: byte); begin midiOutShortMsg(mo, MIDIEncodeMessage(MIDI_NOTE_OFF, NewNote, NewIntensity)); end;
procedure SetInstrument(NewInstrument: byte); begin midiOutShortMsg(mo, MIDIEncodeMessage(MIDI_CHANGE_INSTRUMENT, NewInstrument, 0)); end;
procedure SetCurrentInstrument2(NewInstrument: Integer); begin midiOutShortMsg(mo, MIDIEncodeMessage(MIDI_CHANGE_INSTRUMENT, NewInstrument, 0)); end;
procedure SetCurrentInstrument(CurrentInstrument: TMIDIInstrument); begin midiOutShortMsg(mo, MIDIEncodeMessage(MIDI_CHANGE_INSTRUMENT, ord(CurrentInstrument), 0)); end;
procedure InitMIDI; begin midiOutOpen(@mo, 0, 0, 0, CALLBACK_NULL); midiOutShortMsg(mo, MIDIEncodeMessage(MIDI_CHANGE_INSTRUMENT, 0, 0)); end;
procedure SetPlaybackVolume(PlaybackVolume: cardinal); begin midiOutSetVolume(mo, PlaybackVolume); Form1.TrackBar1.Position:= PlaybackVolume; Form1.Trackbar1.SelEnd:= Form1.TrackBar1.Position; end;
procedure TForm1.GetMidiVolume(var volLe, volRi: Word); var vol: DWORD; begin volLe := 0; volRi := 0; midiOutGetVolume(0, @vol); volLe := vol and $FFFF; volRi := vol shr 16; end;
procedure TForm1.SetMidiVolume(var volLe, volRi: Word); var vol: DWORD; begin vol := volLe + volRi shl 16; midiOutSetVolume(0, vol); end; procedure TForm1.Button10Click(Sender: TObject); begin NoteOn(50, 127); Sleep(500); NoteOff(50, 127); SetInstrument(60); NoteOn(60, 127); Sleep(500); NoteOff(60, 127); SetInstrument(80); NoteOn(70, 127); Sleep(500); NoteOff(70, 127); SetInstrument(90); NoteOn(80, 127); Sleep(500); NoteOff(80, 127); SetInstrument(100); NoteOn(90, 127); Sleep(500); NoteOff(90, 127); SetInstrument(12); NoteOn(40, 127); Sleep(1000); NoteOff(40, 127); end;
procedure TForm1.Button33Click(Sender: TObject); begin SetCurrentInstrument(midiHarmonica); SetPlaybackVolume(65535); NoteOn(50, 127); sleep(200); NoteOn(60, 127); sleep(200); NoteOn(70, 127); sleep(200); NoteOff(70, 127); NoteOff(60, 127); NoteOff(50, 127); SetCurrentInstrument(midiAcousticGrandPiano); SetPlaybackVolume(32000); NoteOn(70, 127); NoteOn(80, 127); sleep(1000); NoteOff(80, 127); NoteOff(70, 127); SetCurrentInstrument(midiApplause); SetPlaybackVolume(65535); NoteOn(64, 127); sleep(2000); NoteOff(64, 127); end;
procedure TForm1.Button41Click(Sender: TObject); begin SetPlaybackVolume(MAX_VOLUME); end;
procedure TForm1.Button42Click(Sender: TObject); begin SetPlaybackVolume(HALF_VOLUME); end;
procedure TForm1.Button43Click(Sender: TObject); begin SetPlaybackVolume(0); end;
procedure GetMidiOutDevices2; var dev: Integer; caps: TMidiOutCaps; begin Form1.ComboBox1.Clear; for dev := 0 to midiOutGetNumDevs - 1 do begin midiOutGetDevCaps(dev, @caps, sizeof(TMidiOutCaps)); Form1.ComboBox1.Items.Add(caps.szPname); end; Form1.ComboBox1.ItemIndex := 0; end;
procedure TForm1.FormCreate(Sender: TObject); begin GetMidiOutDevices2; InitMIDI; end;
end. |