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About: Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy

Module by: Ed Doering. E-mail the author

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Name: Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy
ID: m15490
Language: English (en)
Summary: The basic Karplus-Strong plucked string algorithm must be modified with a continuously adjustable loop delay to produce an arbitrary pitch with high accuracy. An all-pass filter provides a continuously-adjustable fractional delay, and is an ideal device to insert into the closed loop. The delay characteristics of both the lowpass and all-pass filters are explored, and the modified digital filter coefficients are derived. The filter is then implemented as a LabVIEW "virtual musical instrument" (VMI) to be played from a MIDI file using "MIDI JamSession."
Subject: Science and Technology
Keywords: all-pass filter, filter delay, Karplus-Strong plucked string algorithm, LabVIEW, loop delay, lowpass filter, MIDI JamSession, virtual musical instrument
Document Type: -//CNX//DTD CNXML 0.5 plus MathML//EN
License: Creative Commons Attribution License CC-BY 2.0
Authors: Ed Doering (doering@rose-hulman.edu)
Copyright Holders: Ed Doering (doering@rose-hulman.edu)
Maintainers: Ed Doering (doering@rose-hulman.edu), Erik Luther (erik.luther@ni.com), Sam Shearman (sam.shearman@ni.com)
Editors: Erik Luther (erik.luther@ni.com), Sam Shearman (sam.shearman@ni.com)
Latest version: 1.2 (history)
First publication date: Sep 28, 2007 9:47 am -0500
Last revision to module: Mar 18, 2008 9:46 am -0500

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Version History

Version: 1.2 Mar 18, 2008 9:46 am -0500 by Ross J. Reedstrom
Changes: 
fixup audio in flash video files
Version: 1.1 Nov 7, 2007 10:12 am -0600 by Ed Doering
Changes: 
Initial release

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American Chemical Society (ACS) Style Guide:

Doering, E. Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy, Connexions Web site. http://cnx.org/content/m15490/1.2/, Mar 18, 2008.

American Medical Assocation (AMA) Manual of Style:

Doering E. Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy [Connexions Web site]. March 18, 2008. Available at: http://cnx.org/content/m15490/1.2/.

American Psychological Assocation (APA) Publication Manual:

Doering, E. (2008, March 18). Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy. Retrieved from the Connexions Web site: http://cnx.org/content/m15490/1.2/

Chicago Manual of Style (Bibliography):

Doering, Ed. "Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy." Connexions. March 18, 2008. http://cnx.org/content/m15490/1.2/.

Chicago Manual of Style (Note):

Ed Doering, "Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy," Connexions, March 18, 2008, http://cnx.org/content/m15490/1.2/.

Chicago Manual of Style (Reference, in Author-Date style):

Doering, E. 2008. Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy. Connexions, March 18, 2008. http://cnx.org/content/m15490/1.2/.

Modern Languages Association (MLA) Style Manual:

Doering, Ed. Karplus-Strong Plucked String Algorithm with Improved Pitch Accuracy. Connexions. 18 Mar. 2008 <http://cnx.org/content/m15490/1.2/>.