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SRC4193: Reclocking before Sample rate converter

Part Number: SRC4193

Hello, 

we have xmos based usb audio interface board with flip flop recloking then we send i2s signal to sample rate converter for upscale sample rate.

So the recloking before SRC is useless or it has a positive effect to get more precise low jitter signal performance?  If it is totally useless we will redesign the board without reclocking.

Do you advice to reclock after SRC?

Thanks in advance...