PlaySound Command
From GeoGebra Manual
- PlaySound[ <Note>, <Duration>, <Instrument> ]
- Plays a MIDI note.
- Note is an integer from 0 to 127 that represents a musical note given by the table below. When note = 60 a Middle C is played.
- Duration is the time to play the note in seconds.
- Instrument is an integer that represents the synthesized instrument used to play the note. See technical specifications at midi.org for possible instruments.
- Most instruments are supported, but there are differences between computer platforms.
MIDI Notes Octave C C# D D# E F F# G G# A A# B 0 0 1 2 3 4 5 6 7 8 9 10 11 1 12 13 14 15 16 17 18 19 20 21 22 23 2 24 25 26 27 28 29 30 31 32 33 34 35 3 36 37 38 39 40 41 42 43 44 45 46 47 4 48 49 50 51 51 53 54 55 56 57 58 59 5 60 61 62 63 64 65 66 67 68 69 70 71 6 72 73 74 75 76 77 78 79 80 81 82 83 7 84 85 86 87 88 89 90 91 92 93 94 95 8 96 97 98 99 100 101 102 103 104 105 106 107 9 108 109 110 111 112 113 114 115 116 117 118 119 10 120 121 122 123 124 125 126 127
- PlaySound[ <Note Sequence>, <Instrument> ]
- Plays a sequence of MIDI notes using the specified Instrument (see above).
- "Note Sequence" is a string of character commands given in the table below.
Character Command A-G Musical note. For sharps and flats add b or # + Move up one octave. - Move down one octave. /n Note length - /1 whole note
- /2 half note
- /4 quarter note (default)
- also /8, /16, /32, /64
> Louder < Softer . Rest for current note length Space Play the previous note or notes.
- Notes not separated by space are treated as chords and are played at the same time.
Example:
PlaySound["/4CEG /1. /8A B C -A B C ", 0]
- This plays a quarter note chord CEG; rests for a whole note; plays the eighth notes A, B, C; plays them again one octave lower.
- PlaySound[ <File> ]
- Plays a MIDI file with extension .mid. "File" is the directory path to this file.
- PlaySound[ <Function>, <Min Value>, <Max Value> ]
- Plays a sound generated by Function, a time-valued function with range [-1,1]. The time units are seconds and the sound is played from time Min Value to Max Value. Sound is generated by 8-bit samples taken at a rate of 8000 samples per second.
Example:
PlaySound[sin(440 2Pi x), 0, 1]
- This plays a pure sine wave tone at 440 Hz (musical note A) for one second.
- PlaySound[ <Function>, <Min Value>, <Max Value>, <Sample Rate>, <Sample Depth> ]
- Plays a sound generated by Function, a time-valued function with range [-1,1]. The time units are seconds and the sound is played from time Min Value to Max Value. The sampling method is specified by "Sample Depth" and "Sample Rate".
- "Sample Rate" is the number of sample function values taken each second. Allowable values are 8000, 16000, 11025, 16000, 22050, or 44100
- "Sample Depth" is the data size of a sample in bits. Allowable values are 8 and 16.
- PlaySound[ <Boolean Play> ]
- Pause or resume play.
- PlaySound[true] = play, PlaySound[false] = pause.