Eventide H8000FW, Operating Manual

Page: 79 / 206

73
Programs’ Effect on Routing Decisions
As you’ll recall from the
Quickstart
section, to the
right of every program name in the
PROGRAM
area
there are two digits called the "I/O Identifier." On
the screen shown to the right:
"
Q*10 Grafic Eq
" has an "I/O Identifier" of "
44
"
"
O*5 Grafic Eq
" has an "I/O Identifier" of "
88
"
"
Gaspodes Dly_2
" has an "I/O Identifier" of "
32
"
"
Gaspodes Dly_M
" has an "I/O Identifier" of "
22
"
To understand why the "I/O Identifier" is necessary, we must first understand that,
although each DSP has eight inputs and eight outputs, it is not necessarily the case that all
of those inputs and outputs will be used by a given program. As has been stated
elsewhere in this manual, each program is a unique algorithm. The particulars of a given
algorithm dictate how many inputs and outputs will be used, just as they dictate what sorts
of parameters are used. For example, a program that acted as a synthesizer would not
need any inputs. A program that turned a mono signal into a pseudo-quad signal would
only need one input. A program that modulated one stereo signal with another stereo
signal would only need two outputs.
So, the "I/O Identifier" tells us at a glance how many inputs and outputs a program uses.
The first digit refers to the number of active (live) inputs to the program, and the second
digit refers to the number of active (live) outputs to the program. The way these digits
correspond to actual inputs and outputs is as you would expect:
0 x
the program has no inputs. It could be an oscillator or sound effects
generator.
1 x
input 1 is live; inputs 2, 3, ..., 8 are dead.
2 x
inputs 1 and 2 are live; inputs 3, 4, ..., 8 are dead.
and so on!
x 0
the program has no outputs. Perhaps it's a spectrum analyzer.
x 1
output 1 is live; outputs 2, 3, ..., 8 dead.
x 2
outputs 1 and 2 are live; outputs 3, 4, ..., 8 are dead.