Yamaha DX9 Operating Manual page 12

Examples of output waveforms
• Modulator and carrier combinations
Frequency ratio of modulator to carrier equals 1:1
+1
-1
Frequency of modulator to carrier equals 2 :1
+1
Carrier 1
Carrier 2
-1
Frequency of modulator to carrier equals 3 :1
+1
Carrier 1
Carrier 2
3 . Algorithms ... . Combining Several Operators
The DX9 has a total of four operators. The way in which
these operators are combined is known as an "algorithm."
The DX9 has 8 different pre-programmed algorithms. The
8 algorithms are displayed graphically on the control panel.
Taking algorithm number 5 as an example, the lowest two
operators-1 and 3- are carriers. The two operators above
the carriers wil l function as modulators. The output of
operator 4 is fed back (feedback) to its input.
The above is a brief decription of the internal workings of
the FM tone generator system . By varying the pitch fre-
quency, modulation and envelope data it is possible to
edit pre-programmed voices or to create entirely new
voices.
<I I>
Algorithm 5
cpc[J
ce__:p
Divided in two sections
/
~
Mod"'"~ ~
HJ __
M_o_d_ u- la -to _ r _ .;
fi
: H )
L _____ _
j
Carrier
~
______ _
j
Modulates