SRCSetRate
SRCSetRate(dev, SRC_DAC1_BASE, 48000);
SRCSetRate(dev, SRC_DAC2_BASE, 48000);
SRCSetRate(dev, SRC_ADC_BASE, 48000);
SRCSetRate(dev, SRC_DAC1_BASE, port->speed);
SRCSetRate(dev, SRC_DAC2_BASE, port->speed);
SRCSetRate(dev, SRC_ADC_BASE, port->speed);