Ragtime music did feature, but not commonly: in this period, the player was being sold on its artistic capabilities to rich buyers. Many companies' catalogs ran to thousands of rolls, mainly of light, religious or classical music. Huge sums were spent: by 1903, the Aeolian Company had more than 9,000 roll titles in their catalog, adding 200 titles per month. A standard 65-note format evolved, with 11 + 1⁄ 4-inch-wide (290 mm) rolls and holes spaced 6 to the inch, although several player manufacturers used their own form of roll incompatible with other makes. The Pianola was advertised in one of the highest-profile campaigns ever, making unprecedented use of full-page color advertisements.
Trackerboard (music roll passes over trackerboard). Connection from pneumatic to action of piano. Reservoir high tension (low-tension reservoir not shown.) 5. That mechanism finally came into widespread use in the 20th century and was all-pneumatic, with foot-operated bellows providing a source of vacuum needed to operate a pneumatic motor driving the take-up spool while each small inrush of air through a hole in the paper roll was amplified in two pneumatic stages (the so-called double valve mechanism) to sufficient strength to strike a loud note. Votey who invented in 1896 the first practical pneumatic piano player, called the Pianola. This was in all probability due to the lack of suitably flexible airtight material to translate the air flow into the mechanical movement needed to trigger the player device.
Surprisingly, the missing component was the pneumatic reading of the roll. However, it was to be 20 years before all these aspects were combined. As of 1876, in Philadelphia, three working devices were exhibited that between them contained almost all the components that the final player piano would require.
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