The Sound Extension for NetLogo provides primitives to add sound to NetLogo models. It supports two ways of making sound: MIDI sounds, and playback of pre-recorded sound files.
The sound extension comes preinstalled. To use the extension in your model, add a line to the top of your procedures tab:
extensions [sound]
If your model already uses other extensions, then it already has an extensions line in it, so just add sound to the list.
For more information on using NetLogo extensions, see the Extensions Guide.
For examples that use the sound extension, see the Sound section under Code Examples in the NetLogo Models Library.
Note that the sound extension only works in the NetLogo application. It doesn't work in saved applets.
The MIDI part simulates a 128-key electronic keyboard with 47 drums and 128 melodic instruments, as provided by General MIDI Level 1 specification.
It supports 15 polyphonic instrument channels and a single percussion channel. Using more than 15 different melodic instruments simultaneously in a model will cause some sounds to be lost or cut off.
The pitch of a melodic instrument is specified by a key number. The keys on the keyboard are numbered consecutively from 0 to 127, where 0 is the left-most key. Middle C is key number 60.
The loudness of an instrument is specified by a velocity, which represents the force with which the keyboard key is depressed. Velocity ranges from 0 to 127, where 64 is the standard velocity. A higher velocity results in a louder sound.
sound:drums sound:instruments sound:play-drum sound:play-note sound:play-note-later sound:play-sound sound:play-sound-and-wait sound:play-sound-later sound:start-note sound:stop-note sound:stop-instrument sound:stop-music
Reports a list of the names of the 47 drums for use with "sound:play-drum".
Reports a list of the names of the 128 instruments for use with "sound:play-note", "sound:play-note-later", "sound:start-note" and "sound:stop-note".
Plays a drum.
sound:play-drum "ACOUSTIC SNARE" 64
Plays a note for a specified duration, in seconds. The agent does not wait for the note to finish before continuing to next command.
;; play a trumpet at middle C for two seconds sound:play-note "TRUMPET" 60 64 2
Waits for the specified delay before playing the note for a specified duration, in seconds. The agent does not wait for the note to finish before continuing to next command.
;; in one second, play a trumpet at middle C for two seconds
sound:play-note-later 1 "TRUMPET" 60 64 2
Plays a sound file. It does not wait for the sound file to finish before moving to the next command. It supports WAV, AIFF, and AU files.
;; plays the beep.wav sample file sound:play-sound "beep.wav"
Plays a sound file, waiting for it to finish playing before moving to the next command. It supports WAV, AIFF, and AU files.
;; plays the beep.wav sample file, waiting for it to finish before ;; playing boop.wav sound:play-sound-and-wait "beep.wav" sound:play-sound-and-wait "boop.wav"
Plays a sound file after the specified delay, in seconds. It does not wait for the sound file to play or finish before moving to the next command. It supports WAV, AIFF, and AU files.
;; plays the beep.wav sample file one second from now sound:play-sound-later "beep.wav" 1
Starts a note.
The note will continue until "sound:stop-note", "sound:stop-instrument" or "sound:stop-music" is called.
;; play a violin at middle C sound:start-note "VIOLIN" 60 64
;; play a C-major scale on a xylophone foreach [60 62 64 65 67 69 71 72] [ sound:start-note "XYLOPHONE" ? 65 wait 0.2 sound:stop-note "XYLOPHONE" ? ]
Stops a note.
;; stop a violin note at middle C sound:stop-note "VIOLIN" 60
Stops all notes of an instrument.
;; stop all cello notes sound:stop-instrument "CELLO"
Stops all notes.
35. Acoustic Bass Drum 59. Ride Cymbal 2 36. Bass Drum 1 60. Hi Bongo 37. Side Stick 61. Low Bongo 38. Acoustic Snare 62. Mute Hi Conga 39. Hand Clap 63. Open Hi Conga 40. Electric Snare 64. Low Conga 41. Low Floor Tom 65. Hi Timbale 42. Closed Hi Hat 66. Low Timbale 43. Hi Floor Tom 67. Hi Agogo 44. Pedal Hi Hat 68. Low Agogo 45. Low Tom 69. Cabasa 47. Open Hi Hat 70. Maracas 47. Low Mid Tom 71. Short Whistle 48. Hi Mid Tom 72. Long Whistle 49. Crash Cymbal 1 73. Short Guiro 50. Hi Tom 74. Long Guiro 51. Ride Cymbal 1 75. Claves 52. Chinese Cymbal 76. Hi Wood Block 53. Ride Bell 77. Low Wood Block 54. Tambourine 78. Mute Cuica 55. Splash Cymbal 79. Open Cuica 56. Cowbell 80. Mute Triangle 57. Crash Cymbal 2 81. Open Triangle 58. Vibraslap
Piano Reed 1. Acoustic Grand Piano 65. Soprano Sax 2. Bright Acoustic Piano 66. Alto Sax 3. Electric Grand Piano 67. Tenor Sax 4. Honky-tonk Piano 68. Baritone Sax 5. Electric Piano 1 69. Oboe 6. Electric Piano 2 70. English Horn 7. Harpsichord 71. Bassoon 8. Clavi 72. Clarinet Chromatic Percussion Pipe 9. Celesta 73. Piccolo 10. Glockenspiel 74. Flute 11. Music Box 75. Recorder 12. Vibraphone 76. Pan Flute 13. Marimba 77. Blown Bottle 14. Xylophone 78. Shakuhachi 15. Tubular Bells 79. Whistle 16. Dulcimer 80. Ocarina Organ Synth Lead 17. Drawbar Organ 81. Square Wave 18. Percussive Organ 82. Sawtooth Wave 19. Rock Organ 83. Calliope 20. Church Organ 84. Chiff 21. Reed Organ 85. Charang 22. Accordion 86. Voice 23. Harmonica 87. Fifths 24. Tango Accordion 88. Bass and Lead Guitar Synth Pad 25. Nylon String Guitar 89. New Age 26. Steel Acoustic Guitar 90. Warm 27. Jazz Electric Guitar 91. Polysynth 28. Clean Electric Guitar 92. Choir 29. Muted Electric Guitar 93. Bowed 30. Overdriven Guitar 94. Metal 31. Distortion Guitar 95. Halo 32. Guitar harmonics 96. Sweep Bass Synth Effects 33. Acoustic Bass 97. Rain 34. Fingered Electric Bass 98. Soundtrack 35. Picked Electric Bass 99. Crystal 36. Fretless Bass 100. Atmosphere 37. Slap Bass 1 101. Brightness 38. Slap Bass 2 102. Goblins 39. Synth Bass 1 103. Echoes 40. Synth Bass 2 104. Sci-fi Strings Ethnic 41. Violin 105. Sitar 42. Viola 106. Banjo 43. Cello 107. Shamisen 44. Contrabass 108. Koto 45. Tremolo Strings 109. Kalimba 47. Pizzicato Strings 110. Bag pipe 47. Orchestral Harp 111. Fiddle 48. Timpani 112. Shanai Ensemble Percussive 49. String Ensemble 1 113. Tinkle Bell 50. String Ensemble 2 114. Agogo 51. Synth Strings 1 115. Steel Drums 52. Synth Strings 2 116. Woodblock 53. Choir Aahs 117. Taiko Drum 54. Voice Oohs 118. Melodic Tom 55. Synth Voice 119. Synth Drum 56. Orchestra Hit 120. Reverse Cymbal Brass Sound Effects 57. Trumpet 121. Guitar Fret Noise 58. Trombone 122. Breath Noise 59. Tuba 123. Seashore 60. Muted Trumpet 124. Bird Tweet 61. French Horn 125. Telephone Ring 62. Brass Section 126. Helicopter 63. Synth Brass 1 127. Applause 64. Synth Brass 2 128. Gunshot