From: "Robert Dickow" <[EMAIL PROTECTED]> All my tuning, if any, is with the main slide.
Whether or not a particular full double has a separate tuning slide for the Bb branch, it is important to remember that the main tuning slide that is shared between branches affects the Bb slide 4/3 times the amount it affects the F side. For very small tuning adjustments this may not matter, but if the temperature or a particular ensemble requires a large tuning adjustment, you should move the main slide enough to bring the Bb side into tune and then adjust the F side slide in the same direction by 1/3 that amount. This is most necessary only if you have to play in extreme temperatures. If you ever have the misfortune to play in extreme heat you may need to pull every slide proportionately. If you have to move the main slide 1.5 inches, you ought move the F tuning slide 1/2 inch, the Bb 1st valve slide 1/6 inch, the F 1st valve slide about 2/9 inch, etc. etc. etc. This 1.5 inches motion in the slide is calculated for the 3 inches you need to add to the Bb side when moving from 70 degrees F to 100 degrees F. The slide has two legs, so moving it a certain distance affects the length of the horn by double that amount. The nice thing about playing in 100 degree heat -- perhaps the only nice thing -- is that once you get everything in tune there will be almost zero condensation and you won't have to mess further with the slides for emptying. _______________________________________________ post: horn@music.memphis.edu unsubscribe or set options at http://music2.memphis.edu/mailman/options/horn/archive%40jab.org
