Clouds - second crystal for WM8731 necessary

I have a question

on older versions of clouds there is only one crystal for the MCU and the WM8731 is clocked from the MCU. The new versions have an extra crystal for the WM8731.

what is the reason the second crystal was implemented? higher samplingrates, problems with the clock out from MCU?

thanks in advance

I found out that the noise is lower when the master clock is generated by the codec and the MCU is slaved to the codec.

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thanks for the quick answer!

i think i just gonna ad the extra track to the MCU in case i am satisfied with the performance. if not im gonna mount the second crystal.

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