This is a multi-part message in MIME format. ---------------------- multipart/alternative attachment For Christmas I received Arthur Benade's book, "Fundamentals of Musical = Acoustics" (Dover, 1990). It has a thorough coverage of sounds in a = wide variety of instruments, from drums, brass, woodwinds, harpsichords, = and pianos. The math is kept simple, and the acoustics discussions are = oriented towards musicians rather than scientists, so I'm really = enjoying it. He has apparently consulted with instrument manufacturers = of various types, so his theories are grounded in practice. Each = chapter ends with enough questions and exercises to use up every = electron in the universe on this list. On p. 331, he discusses downbearing. Is this practice of fine = adjustment still followed? "...downbearing is carefully proportioned to vary along the scale of any = properly made musical instrument. Makers of the finest instruments find = that the downbearing must be meticulously adjusted string by string on = each individual piano, as a part of its final regulation. Errors in the = trend of the relationship among P [downbearing], Q [backscale], and the = string tension can cause as much trouble to the overall sound of the = piano as can errors in the stiffness and curve of the bridge, or in the = thickness of the soundboard." (A diagram shows the bridge, rear bearing surface (what's the right = term?), and hitch pin. The distance between the bridge and rear bearing = surface is labeled "Q" (it's a muted backscale in his diagram). A level = line is extended from the bridge towards the hitch pin. Its height, as = it crosses over the rear bearing surface, is labeled "P".) "Notice that the downbearing is not simply a matter of getting adequate = contact between the bridge and the strings; the string tension acting = together with theeoffset on the bridge where the string runs zigzag past = two steel pins is already quite sufficient for this contact..." --Cy Shuster-- Rochester, MN ---------------------- multipart/alternative attachment An HTML attachment was scrubbed... URL: https://www.moypiano.com/ptg/pianotech.php/attachments/8d/59/fc/df/attachment.htm ---------------------- multipart/alternative attachment--
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