A data processing system including an input data port for receiving input data samples asynchronous to a native clock signal and having an input sample rate, a first sample rate converter for converting the data samples from the input sample rate to a sample rate synchronous with a rate of the native clock signal, and a data converter for converting data samples output from the first sample rate converter to another format. An analog to digital converter converts an analog signal into output data samples with a sample rate synchronous with the rate of the native clock signal, and a second sample rate converter converts the sample rate of the output data samples from the sample rate synchronous with the rate of the native clock signal to an output sample rate such that output data samples are asynchronous to the native clock signal.