Lexicon PCM 80 - MIDI IMPLEMENTATION DETAILS Midi Implementation Manual page 29

PCM 80 MIDI Implementation Details
Patching a long delay time parameter to milliseconds
Here is some information from the Glide>Hall Algorithm Patchable Parameter Information list, found
earlier in this document.
Seq Bits
52 1
53 16
Note: The range 0-42325 in DelayTime Voice1 for the Glide>Hall Algorithm represents the value 0-42325
milliseconds. Each increment is 1 millisecond. -(Be aware that you can only ACCESS 42.325 seconds
of audio when you have 4 Meg of audio memory installed. -The box is shipped with enough memory to
access 2645 milliseconds).
We want to patch to the DelayTime Voice1. The Tempo Flag field bit preceding the DelayTime Voice1
parameter field in the Patchable Parameter Information list is assigned a 0 to indicate that the Delaytime
Voice1 parameter is in standard form. Down in the Patch Information Block, we put a 0 in the Destination
Patchable Parameter List ID, and a 49 (0x31) in the Destination Patchable Parameter Number. We want
two points, so we put a 2 in the Count of Patch Points.
The Patch Information Block should be completed with the following 4 fields.
We want to patch a source point value of 0 to 0 milliseconds and a source point value of 127 to 1270
milliseconds.
The first 7-bit field will contain a 0 to indicate point value 0. The first 16-bit field will contain a 0 to indicate
0 milliseconds. The second 7-bit field will contain 0x7f to indicate point value 127. The second 16-bit field
will contain 0x04f6 (1270 decimal) to indicate 1270 milliseconds.
26
Dest Dest
List ID Number
0 49
Bits Contents
7 First Patch Point Value (0 through 127)
16 First Destination Patchable Parameter Value
7 Second Patch Point Value (0 through 127)
16 Second Destination Patchable Parameter Value
Range Parameter
1 <Tempo Flag>
42325 DelayTime
Lexicon
Voice1