file:     Keller47.txt
revised:  94.12.13, re pneumatic reader.

COMPILER:    Robbie Rhodes, December 1994
DATA SOURCE: Product Specification, Orgelbau Keller, 1992,
                  and correspondence.

BUILDER:  Frederic Keller, 91462 Dachsberg-Finsterlingen, Germany
STYLE:    Medium size concert organ with 47-keys
POWER:    Hand-cranked or electric motor

SIZE:
  Case: 175 cm high, 140 cm wide, 75 cm deep
        Additional side panels or consoles for drums.
  Total quantity of pipes: 176
  Largest pipe circa 173 cm.

PLAYER SYSTEM:
   speed of medium:  5.5 cm per second
   reader:  pneumatic, rectangular hole, hole height = 1.20 mm.
   medium:  punched cardboard book, round hole diameter = 0.70 mm.
   width of medium:  32.43 cm   (51-key format)
   distance, bass edge to center of first key channel: 0.34874 cm
   channel spacing:  0.34874 cm per key (43 keys in 15 cm)
   total quantity of active channels:  47
   divisions and quantity of channels in division:
     bass section,             8 keys
     accompaniment section,   10 keys
     melody section,          20 keys
     counter-melody section,   0 keys
     percussion section,       4 keys
     controls section,         5 keys

CHANNEL ASSIGNMENT  - channel (key) number, assignment

channel:       1       2   3   4   5       6       7   8
 BASS:         G   .   A   B   H   C   .   D   .   E   F  .

channel:       9      10  11  12  13  14  15      16  17  18
 ACCOMP        G   .   A   B   H   C  C#   D   .   E   F  F#

channel:      19  20  21  22  23  24  25  26  27  28  29  30
 MELODY        G  G#   A   B   H   C  C#   D  D#   E   F  F#

channel:      31  32  33  34  35  36      37      38
 MELODY        G  G#   A   B   H   C   .   D   .   E

channel:   PERC. & CONTROLS:

 39   J   kapellmeister (no sound)
 40   K   snare drum, beater #1
 41   L   snare drum, beater #2
 42   M   bass drum

 43   N   Vio   Violin   = open violin double + single gedeckt
 44   P   Bor   Bourdon  = gedeckt double with one rank detuned
 45   R   Car   Carillon = open octave + single gedeckt
 46   S   ViC   Violin Celeste = open triple with one rank detuned
 47   T   Dec   Declenche (cancel) = muted + gedeckt solo
                                     (fundamental registration)

PITCH TRANSPOSED: "Middle C" will sound as E-flat above (as in Gavioli)

DESCRIPTION OF RANKS, percussion and controls/stops:
  N.B.: German nomenclature "A-B-H-C" used throughout.
  division name, quantity of keys & total quantity of pipes in division
  quantity of pipes in rank, range of rank
    rank name, range [..] ("non-transposed"), true pitch of
    longest pipe, air column length

  name, true sound pitch of longest pipe in the rank, air column length.

BASS 8 keys [G..F]
 16 pipes--
  8 gedeckt contra         [F..E]  G#0 = 51.9 Hz   (164.2 cm - stopped)
  8 gedeckt octave         [F..E]  G#1 = 103.8 Hz  ( 82.1 cm - stopped)
ACCOMP 10 keys [G..F#]
 40 pipes--
  10 gedeckt                [G..F#] B2 = 233 Hz     ( 36.6 cm - stopped)
  10 gedeckt, detuned       [G..F#] B2 = 233 Hz ~
  10 open cello             [G..F#] B2 = 233 Hz     ( 73.3 cm - open)
  10 open octave            [G..F#] B3 = 466 Hz     ( 36.6 cm - open)
MELODY 20 keys [G..E]
120 pipes--
  8 gedeckt                [G..E]  B3 = 466 Hz     ( 18.3 cm - stopped)
  8 gedeckt, detuned       [G..E]  B3 = 466 Hz
 16 open violin, double    [G..E]  B3 = 466 Hz     ( 36.6 cm - open)
  8 open violin, detuned   [G..E]  B3 = 466 Hz ~
  8 open octave (single)   [G..E]  B4 = 933 Hz     ( 18.3 cm - open)
COUNTER-MELODY  0 keys

PERCUSSION  4 keys
  kapellmeister (no sound)
  snare drum, beater #1
  snare drum, beater #2
  bass drum

CONTROLS & STOPS  5 keys

  Control precedence:
    Memory is a slide valve with a pneumatic at each end (as in Mortier).
    Stop "on" always takes precedence over Declenche (cancel/release).

  Vio    Violin = open violin double + single gedeckt
  Bor    Bourdon =    gedeckt double with one rank detuned
  Car    Carillon =   open octave + single gedeckt
  ViC    Violin Celeste = open triple with one rank detuned
  Dec    Declenche (cancel/release) = muted + gedeckt solo
                                       (fundamental registration)

TRUTH TABLE of STOPS - across: names of stops;  down: registers and ranks

                         Vio Bor Car ViC Dec

 BASS voices
  gedeckt contra  . . . . x   x   x   x   x
  gedeckt octave  . . . . . . . . x . . . .
 ACCOMPANIMENT voices:
  gedeckt         . . . . x   x   x   x   x
  gedeckt, detuned  . . . . . x
  open cello                                         ??
  open octave . . . . . . . . . . x
 MELODY voices
  gedeckt         . . . . x   x   x   x   x
  gedeckt, detuned  . . . . . x . . . . . .
  open violin, double     x . . . . . x
  open violin, detuned  . . . . . . . x
  open octave (single)  . . . . . x

TIME DELAYS
    Bass drum:  delay = 85 millisecond (msec) from key "on",
                           duration 106 msec typ.
    Snare drum: delay = 37 msec from key "off",
                           charging duration 50 msec typical.

    Reiteration of a [solo] snare beater is possible with
       16th-notes up to MM = 172 if the medium speed is suitably fast.
    At speed 5.5 cm per second (pneumatic reader system) then
       MM=150 is fastest possible with 16th-notes.

                                - end -