Audio beat tracking of excerpts from a variety of performances of the Maple Leaf Rag is demonstrated by superimposing a burst of white noise at each detected beat

Instrument	Artist	File	Mean	STD
piano	D. Blumberg	`Tap-MapleBlumberg`	0.32	5.36
	C. Bolling	`Tap-MapleBolling`	0.30	4.42
	Copeland	`Tap-MapleCopeland`	0.32	5.75
	Cramer	`Tap-MapleCramer`	0.35	3.32
	Entertainer	`Tap-MapleEnter`	0.33	12.54
	G. Gershwin	`Tap-MapleGershwin`	0.30	8.23
	D. Hyman	`Tap-MapleHyman`	0.24	9.95
	S. Joplin	`Tap-Maple1916`	0.34	4.49
	Jelly Roll Morton	`Tap-MapleMorton`	0.33	10.50
	Motta Junior	`Tap-MapleMotta`	0.31	10.93
	M. Reichle	`Tap-MapleReichle`	0.36	2.16
	J. Rifkin	`Tap-MapleRifkin`	0.33	6.80
big band	S. Bechet	`Tap-MapleBechet`	0.22	7.31
	Dorsey	`Tap-MapleDorsey`	0.22	4.48
	Butch Thompson	`Tap-MapleButch`	0.34	4.84
symphonic	Unknown	`Tap-MapleOrch`	0.34	9.33
	Unknown	`Tap-MapleQLK`	0.25	3.92
a capella	Unknown	`Tap-MapleBygon`	0.33	9.43
brass	Canadian Brass	`Tap-MapleBrass`	0.33	10.14
marimba	Glennie	`Tap-MapleGlennie`	0.26	3.89
guitar	D. Van Ronk	`Tap-MapleRonk`	0.40	12.51
	Van Neil	`Tap-MapleVanNiel`	0.38	1.79
banjo	Golden Gate	`Tap-MapleGGate`	0.33	9.97
	Heftone Banjo Orch.	`Tap-MapleHeftone`	0.28	5.72
	Klezmer	`Tap-MapleKlez`	0.30	3.63
	Kukuruza	`Tap-MapleKukuruza`	0.27	5.01
	Big Mama Sue	`Tap-MapleMamaSue`	0.23	3.85

The Maple Leaf Rag has been performed many times by many artists in many styles over the years. In addition to CDs in shops and over the web, many versions are available using the gnutella file sharing network. This table of 28 different performances, showing the artist, instrumentation and style. Excerpts (approximately thirty seconds of each) can be heard in with the detected beat locations indicated by short bursts of noise. The mean value of the length of the beat intervals is given (in seconds) for each version and the column labeled "STD" gives the standard deviation about this mean (the number is multiplied by 1000 for easier comparison).