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Audio data RF synchronization

Associate II


I am sampling audio data with sampling rate 16 kHz and then send it using RF to the other MCU which is sending to DAC samples with the same 16 kHz sampling rate, Im using DMA for sending data through I2S to external DAC. The problem is that the packet of samples is send 4 times to the DAC before the next packet of samples comes in. If I wait for the every packet I am not able to sample the DAC with 16 kHz. It does not depend on the sampling rate. The RF speed is about 2Mbps. I do not know the exact time of sending data between RFs. I do not know how to synchronize data, any ideas? Thanks for help in advance.