ASIO

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(Audio Stream    Input/Output)

1. An audio interface driver protocol created by Steinberg.
2. Allows audio interfaces to connect to and be controlled by a computer.

ASIO is a PC audio driver technology developed by Steinberg Media Technologies GmbH (and since adopted across the pro-audio industry) that allows audio software to communicate directly with connected audio hardware with extremely low latency, high channel count, and bit-transparent transfer of data.