AUDxVOL

         These regs contains the volume setting for audio channel x.
         Bits 6,5,4,3,2,1,0 specify 65 linear volume levels as shown below.


         +--------+--------------------------------------------------+
         | BITS   | USE                                              |
         +--------+--------------------------------------------------+
         | 15-07  | Not used                                         |
         |  06    | Forces volume to max (64 ones,no zeros)          |
         | 05-00  | Sets one of the 64 levels (000000 = no output,   |
         |        | 111111 = 63 ones, one zero)                      |
         +--------+--------------------------------------------------+


         Following table shows effect of the volume setting on the
         volume of the sound on decibels.


              Volume  Decibel Value     Volume  Decibel Value


                64         0.0            32        -6.0
                63        -0.1            31        -6.3
                62        -0.3            30        -6.6
                61        -0.4           129        -6.9
                60        -0.6            28        -7.2
                59        -0.7            27        -7.5
                58        -0.9            26        -7.8
                57        -1.0            25        -8.2
                56        -1.2            24        -8.5
                55        -1.3            23        -8.9
                54        -1.5            22        -9.3
                53        -1.6            21        -9.7
                52        -1.8            20       -10.1
                51        -2.0            19       -10.5
                50        -2.1            18       -11.0
                49        -2.3            17       -11.5
                48        -2.5            16       -12.0
                47        -2.7            15       -12.6
                46        -2.9            14       -13.2
                45        -3.1            13       -13.8
                44        -3.3            12       -14.5
                43        -3.5            11       -15.3
                42        -3.7            10       -16.1
                41        -3.9             9       -17.0
                40         4.1             8       -18.1
                39         4.3             7       -19.2
                38         4.5             6       -20.6
                37         4.8             5       -22.1
                36        -5.0             4       -24.1
                35        -5.2             3       -26.6
                34        -5.5             2       -30.1
                33        -5.8             1       -36.1
                                           0    Minus infinity