![]() ![]() ![]() The 'complication' with the Bewley chart is the use of 'decimal' attachment positions, where, for example, 'Gb2.5' means 'somewhere between slide-alone positions 2 and 3'. Do NOT think of attachment positions as 'altered Bb positions'!įalin is clearly looking for a chart for the common independent tuning: Bb/F(thumb)-Gb(finger)-D(double). Practice playing simple tunes (scalar passages or arpeggios) entirely with the F attachment and entirely with the Gb attachment-until muscle-memory kicks in. When playing attachment tones, think of the instrument tuned in the respective 'key'-with respective (longer) 1st, 2nd, 3rd. This gives a perfectly-in-tune D tuning for the double combination, with a very evenly distributed set of harmonics throughout the whole range. I personally prefer the G-natural tuning for the thumb-trigger attachment, with the finger-trigger attachment tuned to (a 20 cent sharp) E. And, as is fairly well known, the G-natural tuning gives a lot more handy attachment alternates (including the fifth harmonic). This is why some players prefer a G-natural tuning for the 'second' valve. Adjust (slightly) according to your personal preferences.Īs you can see, the F-attachment and Gb-attachment tones are quite close together. With the F and Gb attachments tuned precisely, the double combination D tuning is (theoretically) a few cents flat-as can be seen. You can see at a glance where the coloured zones touch, indicating no alternates for those tones. ![]() The 'wider' the unshaded portions, the more alternates. The unshaded portions between the coloured zones indicate where alternate positions are available. The blue-shaded zones are bordered by a chromatic scale with longest slide positions. The red-shaded zones are bordered by a chromatic scale with shortest slide positions. Higher attachment harmonics are mostly too close to slide-alone harmonics and not usually used except for 'special effects'. The following ETSP (Equitempered Tone/Slide Position) Chart shows relative Bb positions (black dots) F-attachment positions (open circles), first-through-third harmonics Gb-attachment positions (stars), first-through-fourth harmonics and D-double-attachment positions (stars-in-circles), first and second harmonics. ![]()
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