Attached to this text message is a BinHex4-encoded file containing
68283BV1.ZIP, which (when un-zipped) is 68283BV1.MID.

This is the Ampico roll of Paderewski Minuet, Op. 14, No. 1, played
by Sergei Rachmaninoff.  Wayne Stahnke transmitted the source file,
68283BAR.MID in Digest 960311, encoded using base64.  After I
decoded from base64 format I named the resulting file
"68283BAR.MID".  This file meets the minimum requirements of the
Standard Midi File Specification.  Because I use a Macintosh
computer, it was also necessary to set Type=Midi.  I used an old
utility named "DeskZap"; ResEdit could also be used.

Then I processed the new Midi file:

1. I added these Meta events at the beginning of the file, which
contain data for Meter and Tempo, so that the file will play at 800
ticks per second:

•(in header)   Ticks per qtr_note = 240
FF 58 04   4/4 Time, 24 tix/beat, 2 32nds/24tix
FF 51 03   rMM 200.0  300000 usec/qtr_note
FF 54 05   SMPTE Offset:  64  0  0  0  0  ;required by some editors

•2. I created new Loud Pedal (#64) and Soft Pedal (#67) controls from
the "tracker bar notes", Ampico 3B and 3T, respectively.

3. I created new Midi-Velocity values with my program called
"Ampico-A Player".  I don't want to call it an "Emulator" program,
because it is not tested.  In particular, my modeling of the A
amplifier and crescendo is very simplified.

The final version sounds quite nice on my Roland piano synth.  My
editor, MasterTracks Pro (Macintosh) displays the Midi velocities,
and shows the crescendo actions.

For Horst and Wayne (because you both have written "emulators"):

A fast and simple way to exhibit the expression in the file is to
create a histogram, which shows how many times each discrete
velocity was used.  The table of values (below) shows that the
quietest intensity was MidiVel = 37; this is the "Cancel" mode.  The
action of the Crescendo and Amplifier adds extra MidiVel, et cetera.

-- Robbie Rhodes  14 March 1996

2 attachments:

Attachment 1. -- Histogram of Midi-Velocy

•  vel     #

  1       0
  2       0
  3       0
  4       0
  5       0
  6       0
  7       0
  8       0
  9       0
 10       0
 11       0
 12       0
 13       0
 14       0
 15       0
 16       0
 17       0
 18       0
 19       0
 20       0
 21       0
 22       0
 23       0
 24       0
 25       0
 26       0
 27       0
 28       0
 29       0
 30       0
 31       0
 32       0
 33       0
 34       0
 35       0
 36       0
 37     329     cancel
 38       4
 39       1
 40       0
 41       4
 42       2
 43     152     "2"
 44       3
 45      28
 46       4
 47       3
 48       4
 49       2
 50     238     "4"
 51      18
 52       7
 53       9
 54      15
 55      16
 56       8
 57     263     "24" or "6"
 58      55
 59      34
 60      28
 61      27
 62      21
 63       8
 64     147     "26"
 65      58
 66       8
 67      16
 68      15
 69      25     
 70      12
 71       9
 72      43
 73      31
 74      34
 75      40
 76      16
 77      10
 78       5
 79      97
 80       6
 81      18
 82      14
 83       7
 84       8
 85      11
 86      66
 87      16
 88      14
 89       5
 90       5
 91       9
 92       3
 93       2
 94       0
 95       0
 96       0
 97       0
 98       0
 99       0
100       0
101       0
102       0
103       0
104       0
105       0
106       0
107       0
108       0
109       0
110       0
111       0
112       0
113       0
114       0
115       0
116       0
117       0
118       0
119       0
120       0
121       0
122       0
123       0
124       0
125       0
126       0
127       0

•Attachment 2. --

 [ The attached file has been moved to
 [ ftp://ftp.foxtail.com/pub/mechanical-music/misc/68283bar.mid