Register Addresses 10H; Registers 10H; Registers 18H - Yamaha YM3806 Programmer's Manual

OPQ Programmer's Guide V 1.1
5.2 Register addresses 10H...1FH
This register area contains channel specific settings. All settings affect the whole channel.
Channel number is the 3 least siginficant bits of the register address.
5.2.1 Registers 10H...17H: Algorithm / feedback / output channel
D7 D6
OCH1 OCH2
OCH1
OCH2
FB2...FB0
ALG2...ALG0
At least one of bits OCH1 or OCH2 must be set to hear the channel.
In PSR-70, output channel 1 is connected through chorus effect (not part of OPQ chip),
channel 2 is connected directly.
5.2.2 Registers 18H...1FH: Vibrato / tremolo / echo
D7 D6
ECHO VIB2
ECHO
VIB2...VIB0
TR1...TR0
D5 D4
FB2 FB1
This channel's output is connected to output channel 1 (so called
"right channel").
This channel's output is connected to output channel 2 (so called "left
channel").
Op0's feedback amount 0...7. 0 = no feedback, 7 = max feedback.
Channel's algorithm 0...7. Algorithm numbering according to figure on
page 6.
D5 D4
VIB1 VIB0
This bit adds a short linear release ramp after operator's own release
has ended. Sounds like a short echo when normal release is short.
With long releases, you really cannot hear any effect.
Amount of vibrato (frequency modulation by LFO), 0...7. 0 = no
vibrato, 7 = max vibrato.
Amount of tremolo (amplitude modulation by LFO), 0...3. 0 = no
tremolo, 3 = max tremolo.
D3 D2
FB0 ALG2
D3 D2
- -
D1 D0
ALG1 ALG0
D1 D0
TR1 TR0
14