وقد تم تصميم ألسا مع بعض الميزات التي لم تكن متاحة و مفهومة في وقت نظام الصوت المفتوح ( OSS) :*توليف MIDI الأجهزة .
==Features==ALSA was designed with some features which were not, at the time of its conception, supported by the Open Sound System (OSS):* Hardware-based MIDI synthesis.