LogiCORE IP Asynchronous Sample Rate Converter v.2.0 Product Guide (PG039) - 2.0 English - The LogiCORE™ IP Asynchronous Sample Rate Converter (ASRC) core converts stereo audio from one sample frequency to another. The input and output sample frequencies can be an arbitrary fraction of one another or the same frequency, but based on different clocks. The output is a band-limited version of the input resampled to match the output sample timing.