Creative SB0350 Programming Manual page 74

4-16 Mixer Chip Programming
Registers 0x38/0x39 (Line volume .L/.R)
Register
Register 0x3B (PC Speaker volume)
Register 0x3C (Output mixer switches)
Register 0x3D (Input Mixer.L switches)
Register 0x3E (Input Mixer.R switches)
0x3A (Mic volume)
5 bits per channel, giving 32 levels.
0 to 31 – 62 dB to 0 dB, in 2 dB steps.
Default is 0 – 62 dB.
2 bits, giving 4 levels.
0 to 3 – 18 dB to 0 dB, in 6 dB steps.
Default is 0 – 18 dB.
Set the appropriate bit to 1 to close the switch, 0 to open.
The default is
Line.L Line.R
1 1
Set the appropriate bit to 1 to close the switch, 0 to open.
The default is
MIDI.L MIDI.R
0 0
Set the appropriate bit to 1 to close the switch, 0 to open.
The default is
MIDI.L MIDI.R
0 0
When recording in mono, note that samples will only be taken from
So, if a mono recording of a stereo source is desired, the switches
controlled by registers 0x3D and 0x3E must be manipulated to
enable both channels of a stereo source to be mixed together first
into the left input mixer before being sampled.
CD.L CD.R Mic
1 1
Line.L Line.R CD.L
1 0 1
Line.L Line.R CD.L
0 1 0
the left input mixer.
1
CD.R Mic
0 1
CD.R Mic
1 1