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您好、Collin、
请找到我们为录制和回放而额外设置的 alsamixer 设置:
1) PCM (LDAC_VOL、RDAC_VOL)增益为最大值(0dB)
2) 2) HP DAC (DACL1_2_HPLOT_VOL、DACR1_2_HPROUT_VOL)增益最大(0dB)
3) 3) LINE1R_2_RADC_CTRL 和 LINE1L_2_RADC_CTRL 差分模式。
请找到我们为录制而执行的步骤:
i2cset -f -y 2 0x18 0x1a 0x80
i2cset -f -y 2 0x18 0x1d 0x80
i2cset -f -y 2 0x18 0x0c 0xa0
i2cset -f -y 2 0x18 0x6b 0xc0
i2cset -f -y 2 0x18 0x19 0x40
arecord -c 2 -d 10 -D HW:0、0 -r 8000 -f S16_LE test.wav