تيار ALSA- ألسا هو تدفق البيانات التي تتمثل في الصوت ، و شكل التيار الأكثر شيوعا هو PCM فيجب أن يتم إعداده بهذه الطريقة ليتناسب مع الخصائص أو مواصفات الأجهزة :*sampling rate: 44.1 kHz on home stereos, and 48 kHz on home theaters*sample width: measured in some number of bits per sample (such as 8, 16, 24, or 32 bits/sample)*sample encoding: such as endianness*number of channels: 1 for mono, 2 for stereo, or 6 for AC-3/IEC958إطار ألسا يوفر طبقة في (ASOC) بهدف دعم أفضل للإطار على الأنظمة المدمجة التي تستخدم تصاميم منظومة على رقاقة (SoC).
An ALSA "stream" is a data flow representing sound; the most common stream format is PCM that must be produced in such a way as to match the characteristics or parameters of the hardware, including:* "sampling rate": 44.1 kHz on home stereos, and 48 kHz on home theaters* "sample width": measured in some number of bits per sample (such as 8, 16, 24, or 32 bits/sample)* "sample encoding": such as endianness* "number of channels": 1 for mono, 2 for stereo, or 6 for AC-3/IEC958==Implementations==The ALSA System on Chip (ASoC) layer aims to provide better support for ALSA on embedded systems which use a system-on-chip (SoC) design.