Waveshare Music Shield User Manual page 6

Music Shield User Manual
10 SM_SDISHARE
11 SM_SDINEW
12 SM_ADPCM
13 -
14 SM_LINE1
15 SM_CLK
These bits are the primary focus of the present register:
2nd bit: SM_RESET Soft reset,
12th bit: SM_ADPCM ADPCM recording active,
14th bit: SM_LINE1 MIC / LINE1 selector.
SCI_BASS Register: it is used to control the sound effect of VS1053b.
Name
ST_AMPLITUDE
ST_FREQLIMIT
SB_AMPLITUDE
SB_FREQLIMIT
The sound effect can be set by modifying the bit of the register.
SCI_CLOCKF Register: it is used to set the frequency, multiplier, etc, of the clock.
SCI_VOL Register: it is a volume control for the player hardware. The most significant byte of the
volume register controls the left channel volume, the low part controls the right channel volume. The
channel volume sets the attenuation from the maximum volume level in 0.5 dB steps. Thus, maximum
volume is 0x0000 and total silence is 0xFEFE.
Revision 1.1. Date: December 7, 2015. Author: W. L. Yan. Editor: Felix.
Share SPI chip select
VS1002 native SPI modes
ADPCM recording active
-
MIC / LINE1 selector
Input clock range
Bits Descriptions
15:12 Treble Control in 1.5 dB steps (-8..7, 0 = off)
11:8 Lower limit frequency in 1000 Hz steps (1..15)
7:4 Bass Enhancement in 1 dB steps (0..15, 0 = off)
3:0 Lower limit frequency in 10 Hz steps (2..15)
SCI_CLOCKF bits
Name Bits Description
SC_MULT 15:13 Clock multiplier
SC_ADD 12:11 Allowed multiplier addition
SC_FREQ 10:0 Clock frequency
share awesome hardware
0 no
1 yes
0 no
1 yes
0 no
1 yes
0 right
1 wrong
0 MICP
1 LINE1
0 12..13 MHz
1 24..26 MHz
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