Hi team,
The customer uses TAS5558 case-1 (Figure 1) to input analog microphone signals through SDIN5. When the external sound card is changed to (24bit 48000, as shown in Figure 2 below) (the measured TAS5558 MCLK is 12.288MHZ and the sampling rate is 48Khz), the power amplifier output will have a relatively fixed frequency noise of 3-4khz.
The external sound card is changed to (24bit 44100, as shown in Figure 2 below) (the measured TAS5558 MCLK is 11.289MHZ, the sampling rate is 44.1KHz,) without noise.
Is this noise related to the register setting of TAS5558 ?
fig.1
Fig.2
Fig.3
0XC5 寄存器设置为: D31-D24 0x07
D23-D16 0x01
D15-D8 0x00
D7-D0 0X02
Best Regards,
Amy Luo