A piano-roll for Welte-Mignon, about 1919, according to the Buffalo Convention

The Buffalo Convention of December 10, 1908^[1] established two future roll formats for the US-producers of piano rolls for self-playing pianos. The two formats had different punchings of 65 and 88 notes, but the same width (11 1/4 inches or 285 mm). This made it possible to play the piano rolls on any self-playing instrument built according to the convention, albeit sometimes with a loss of special functionality. This format became a loose world standard.

[edit] References

1. ^ Music Trade Review, New York, NY, Vol. 47, No. 24, p. 31 from December 12, 1908.

• William Braid White: The player-piano up-to-date: a comprehensive treatise ... New York 1914 (The date of convention is given wrongly as 1909)