Output Attenuation; Register Addresses 80H; Registers 80H - Yamaha YM3806 Programmer's Manual

OPQ Programmer's Guide V 1.1

5.5.1 Output attenuation

D7 D6
- ATT6
ATT6...ATT0
Varying output level of a carrier varies the channel volume, and possibly timbre, if there
are multiple carriers. Varying output level of a modulator varies the sound timbre.
5.6 Register addresses 80H...FFH
Rest of the register groups (4...7) contain envelope related settings. All settings are
operator specific. The addressing scheme is described in chapter 4.2.
5.6.1 Registers 80H...9FH: Envelope: attack rate / key scaler
D7 D6
KSE2 KSE1
KSE2...KSE0
AR4...AR0
D5 D4
ATT5 ATT4
Operator's output attenuation 0...127.
0 = no attenuation (max output level)
...
127 = max attenuation (operator silent)
D5 D4
KSE0 AR4
Key scaler for envelope, 0...7. Scales all envelope times (attack,
decay, release) by shortening times towards higher notes.
0 = light scaling (times are slightly shorter at higher notes)
...
7 = heavy scaling (times are much shorter at higher notes)
Attack rate 0...31.
0 = very slow (very long attack time)
...
31 = very fast (attack time about zero)
D3 D2
ATT3 ATT2
D3 D2
AR3 AR2
D1 D0
ATT1 ATT0
D1 D0
AR1 AR0
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