オペレータマスク(スロットマスク)
FM音源の各オペレータを有効にするか否かを、以下の値で指定します。
OP1 | OP2 | OP3 | OP4 | 設定値(10進数) | 設定値(2進数) |
---|---|---|---|---|---|
OFF | OFF | OFF | OFF | 0 | %0000 |
ON | OFF | OFF | OFF | 1 | %0001 |
OFF | ON | OFF | OFF | 2 | %0010 |
ON | ON | OFF | OFF | 3 | %0011 |
OFF | OFF | ON | OFF | 4 | %0100 |
ON | OFF | ON | OFF | 5 | %0101 |
OFF | ON | ON | OFF | 6 | %0110 |
ON | ON | ON | OFF | 7 | %0111 |
OFF | OFF | OFF | ON | 8 | %1000 |
ON | OFF | OFF | ON | 9 | %1001 |
OFF | ON | OFF | ON | 10 | %1010 |
ON | ON | OFF | ON | 11 | %1011 |
OFF | OFF | ON | ON | 12 | %1100 |
ON | OFF | ON | ON | 13 | %1101 |
OFF | ON | ON | ON | 14 | %1110 |
ON | ON | ON | ON | 15 | %1111 |
指定する際は、二進数表記を使用すると便利です。
[例] VOP%1000 ; 「VOP8」と等価 ;OP4のみ有効にします。
%1111 |||| |||OP1(0でOFF, 1でON) ||OP2 |OP3 OP4