ASIO（Audio stream input output），音频设备驱动进程的一种。

ASIO是由德国Steinberg公司所提出的音频流输入输出应用进程，为音频API标准之一。现今贩售的高级声卡多具备此一规格，亦有支持Windows和Mac OS的驱动，已成为业界大多采用的标准。与Mac OS X的Core Audio是同等级的技术。另外Linux方面，也具备低延迟内核。

Windows和Mac OS皆拥有支持ASIO的驱动程序。ASIO可实现低延迟、高同步、高吞吐率。其开发目的是为了改善过去OS所搭载的驱动无法进行多信道传输，而提出的改善方案。ASIO可依照机器所能处理的情况下进行多信道、采样率、比特数据处理。

Asio is a genus of typical owls, or true owls, in the family Strigidae. The genus Asio contains the eared owls, which are characterised by feather tufts on the head which give the appearance of "ears". This group has representatives over most of the planet, and the short-eared owl is one of the most widespread of all bird species, breeding in Europe, Asia, North and South America, the Caribbean, Hawaii and the Galápagos Islands. Its geographic range extends to all continents except Antarctica and Australia.