RTL is the metric I tested for: What is the total amount of time an interface takes to send and receive audio given certain settings?Ī latency measurement is only meaningful if you know two other values: Sample Rate and Buffer Size. There is some amount of latency in both an interface's input and output audio path, and round-trip latency (RTL) is the combination of both of those times. This buffering introduces some amount of latency that is, the fact that the audio data is buffered means that there is a small amount of built-in delay between when the audio data is first transmitted by one device (an audio interface) and received by another (your computer). Audio interfaces are audio streaming devices, and on modern operating systems all streaming is "buffered" or "packeted." Rather than truly sending a constant binary stream of audio data, your computer bundles up tiny chunks of audio into separate data buffers that are reassembled at the destination end of the stream.
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