Yamaha FX900 - Manual (Page 14)

Changing Algorithms
Deciding which algorithm to use for a particular combination
of effects requires a little logical thought. Consider, for
example, the following effect chain:
COMPRESSOR— CHORUS PRCHCHANGE REVERB
Compression, when used, will nearly always be the first effect
in a chain because the following effects usually benefit from a
"smoother" input signal. Chorus follows the compressor in
this example, and this stage is followed by a pitch change
effect. Reverb comes last simply because we usually want to
apply reverb to the entire sound.
Now let's see what happens if we modify this arrangement
slightly;
In this case the reverb stage is connected In parallel with the
pitch change stage. Reverb is applied to the compressed and
chorused signal, but not to the pitch change effect. The
output will be a combination of relatively "dry"
compressor/chorus/pitch change, and compressor/chorus
with reverb.
Obviously things can get quite complex, but this highlights
the incredible versatility provided by the FX900 algorithm
system. Perhaps the best approach to selecting an algorithm
is to logically determine the configuration that seems like it
will provide the sound you need, then simply try it. If it doesn't
work out the way you planned, then try other configurations
until you're satisfied. After a while you'll develop a "feel" for
the various combinations, and will be able to program quickly
and efficiently.
1. Press the [ALG] key so that it lights. The currently
selected algorithm will appear on the display, and the
underline cursor will be positioned below the algorithm
number at the lower left-hand corner (the cursor can be
moved by using the cursor [ ◄] and [ ►] keys, but for
now we want it under the algorithm number).
2. Use the [DATA ENTRY] control or
[A]
and [▼] keys to
select the desired algorithm.
3. Press the [ALG] key again to return to the previous
mode.
The algorithm displays correspond to the various algorithms
as follows (the effect assignments shown are those of
PRESET program number 1: Grand Dist.):
Algorithm 1
Algorithm 2
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