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STA306

3.14 Channel 6 Volume (address 0Eh)

The Volume structure of the STA306 consists of individual volume registers for each channel and a master vol-

ume register that provides an offset to each channels volume setting. The individual channel volumes are ad-

justable in 0.5dB steps from +24dB to -103dB. As an example if C5V = 0Bh or +18.5dB and MV = 21h or -

16.5dB, then the total gain for channel 5 = +2dB. The Master Mute when set to 1 will mute all channels at once,

whereas the individual channel mutes(CxM) will mute only that channel. Both the Master Mute and the Channel

Mutes provide a "soft mute" with the volume ramping down to mute in 8192 samples from the maximum volume

setting at the internal processing rate(~192kHz). A "hard mute" can be obtained by commanding a value of all

1's(255) to any channel volume register or the master volume register. When volume offsets are provided via

the master volume register any channel that whose total volume is less than -103dB will be muted. All changes

in volume take place at zero-crossings when ZCE = 1(configuration register B) on a per channel basis as this

creates the smoothest possible volume transitions. When ZCE=0, volume updates will occur immediately.

BIT

D7

D6

D5

D4

D3

D2

D1

D0

NAME

C6V7

C6V6

C6V5

C6V4

C6V3

C6V2

C6V1

C6V0

RST

0

0

1

100

0

0