The ASRC algorithm runs a series of cascaded FIR filters to perform the rate conversion including a final adaptive filter to handle the varying rate change between the input and the output. The latency or group delay through the filter depends on the input rate and output rate and the input block size. Table 2 quantifies the amount of latency in milliseconds seen from the filtering. For input block sizes of greater than four please add 1000 * (INPUT_BLOCK_SIZE - 4) / INPUT_SAMPLE_RATE milliseconds to the numbers in the table.

ASRC total filter delay by sample rate in milliseconds for input block size of four

		Output rate
		44.1 kHz	48 kHz	88.2 kHz	96 kHz	176.4 kHz	192 kHz
Input rate	44.1 kHz	0.907	0.899	0.896	0.899	0.896	0.894
	48 kHz	0.910	0.833	0.830	0.823	0.825	0.823
	88.2 kHz	0.907	0.908	0.454	0.450	0.448	0.450
	96 kHz	0.931	0.833	0.455	0.417	0.415	0.411
	176.4 kHz	0.998	0.996	0.317	0.319	0.159	0.157
	192 kHz	0.998	0.917	0.295	0.292	0.148	0.146