pxt-calliope/libs/microbit/music.ts

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enum Note {
C = 262,
//% block=C#
CSharp = 277,
D = 294,
Eb = 311,
E = 330,
F = 349,
//% block=F#
FSharp = 370,
G = 392,
//% block=G#
GSharp = 415,
A = 440,
Bb = 466,
B = 494,
C3 = 131,
//% block=C#3
CSharp3 = 139,
D3 = 147,
Eb3 = 156,
E3 = 165,
F3 = 175,
//% block=F#3
FSharp3 = 185,
G3 = 196,
//% block=G#3
GSharp3 = 208,
A3 = 220,
Bb3 = 233,
B3 = 247,
C4 = 262,
//% block=C#4
CSharp4 = 277,
D4 = 294,
Eb4 = 311,
E4 = 330,
F4 = 349,
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//% block=F#4
FSharp4 = 370,
G4 = 392,
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//% block=G#4
GSharp4 = 415,
A4 = 440,
Bb4 = 466,
B4 = 494,
C5 = 523,
//% block=C#5
CSharp5 = 555,
D5 = 587,
Eb5 = 622,
E5 = 659,
F5 = 698,
//% block=F#5
FSharp5 = 740,
G5 = 784,
//% block=G#5
GSharp5 = 831,
A5 = 880,
Bb5 = 932,
B5 = 989,
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}
enum BeatFraction {
//% block=1
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Whole = 1,
//% block="1/2"
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Half = 2,
//% block="1/4"
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Quater = 4,
//% block="1/8"
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Eighth = 8,
//% block="1/16"
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Sixteenth = 16
}
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/**
* Generation of music tones through pin ``P0``.
*/
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//% color=#D83B01 weight=98
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namespace music {
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let beatsPerMinute: number = 120;
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/**
* Plays a tone through pin ``P0`` for the given duration.
* @param frequency TODO
* @param ms TODO
*/
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//% help=music/play-tone weight=90
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//% blockId=device_play_note block="play|tone (Hz) %note=device_note|for (ms) %duration=device_beat" icon="\uf025" blockGap=8
export function playTone(frequency: number, ms: number): void {
pins.analogSetPitchPin(AnalogPin.P0);
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pins.analogPitch(frequency, ms);
}
/**
* Plays a tone through pin ``P0``.
* @param frequency TODO
*/
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//% help=music/ring-tone weight=80
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//% blockId=device_ring block="ring tone (Hz)|%note=device_note" icon="\uf025" blockGap=8
export function ringTone(frequency: number): void {
pins.analogSetPitchPin(AnalogPin.P0);
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pins.analogPitch(frequency, 0);
}
/**
* Rests (plays nothing) for a specified time through pin ``P0``.
* @param ms TODO
*/
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//% help=music/rest weight=79
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//% blockId=device_rest block="rest(ms)|%duration=device_beat"
export function rest(ms: number): void {
playTone(0, ms);
}
/**
* Gets the frequency of a note.
* @param name TODO
*/
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//% weight=50 help=music/note-frequency
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//% blockId=device_note block="%note"
export function noteFrequency(name: Note): number {
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return name;
}
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function init() {
if (beatsPerMinute <= 0) beatsPerMinute = 120;
}
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/**
* Returns the duration of a beat in milli-seconds
*/
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//% help=music/beat weight=49
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//% blockId=device_beat block="%fraction|beat"
export function beat(fraction?: BeatFraction): number {
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init();
if (fraction == null) fraction = BeatFraction.Whole;
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let beat = 60000 / beatsPerMinute;
if (fraction == BeatFraction.Whole) return beat;
else if (fraction == BeatFraction.Half) return beat / 2;
else if (fraction == BeatFraction.Quater) return beat / 4
else if (fraction == BeatFraction.Eighth) return beat / 8;
else return beat / 16;
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}
/**
* Returns the tempo in beats per minute. Tempo is the speed (bpm = beats per minute) at which notes play. The larger the tempo value, the faster the notes will play.
*/
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//% help=music/tempo weight=40
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//% blockId=device_tempo block="tempo (bpm)" blockGap=8
export function tempo(): number {
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init();
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return beatsPerMinute;
}
/**
* Change the tempo by the specified amount
* @param bpm The change in beats per minute to the tempo, eg: 20
*/
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//% help=music/tempo weight=39
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//% blockId=device_change_tempo block="change tempo by (bpm)|%value" blockGap=8
export function changeTempoBy(bpm: number): void {
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setTempo(beat(BeatFraction.Whole) + bpm);
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}
/**
* Sets the tempo to the specified amount
* @param bpm The new tempo in beats per minute, eg: 120
*/
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//% help=music/tempo weight=38
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//% blockId=device_set_tempo block="set tempo to (bpm)|%value"
export function setTempo(bpm: number): void {
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init();
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if (bpm > 0) {
beatsPerMinute = Math.max(1, bpm);
}
}
}