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PCM4204EVM: System clock input regarding interfacing with Raspberry Pi

Part Number: PCM4204EVM
Other Parts Discussed in Thread: PCM4204

Dear team,

I'm working on a prototype design based on the PCM4204,

Now I want the PCM4204 works in slave mode, thus, it requires a system clock input (24.576Mhz).

But RaspPi doesn't provide this frequency clock signal.

Refering to this thread, the phase between MCK/BCK/LRCK doesn't matter, 

https://e2e.ti.com/support/audio-group/audio/f/audio-forum/504731/pcm1781-or-any-i2s-dac-clock-sources

I'm wondering if I can use another external clock works as the MCK.