![]() However in my case, I use DVDD instead since it seems to work just fine. In systems where XSMT is not required, it can be directly connected to AVDD. For some reason the XSMT pins wasn't getting correct value, hence the muted sound. Quick check by connecting XSMT and DVDD pins with jumper wire causing the sound to come out. Low input value means soft mute, high input value mean soft un-mute. As described on the datasheet, this chip has XSMT pin for soft mute control. Two chips are required because there are four different channels to handle. This unit uses Texas Instruments PCM5121 audio DACs as seen on the following photo. I personally have three of this speaker, two of them exhibiting this same problem.
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