[alsa-devel] Questions about virtual ALSA driver (dummy), PortAudio and full-duplex drops (playback)

Raymond Yau superquad.vortex2 at gmail.com
Thu Aug 15 06:17:22 CEST 2013

> While I have learned that modern cards do not have on-board buffers,

Take a look at Intel® High Definition Audio Specification Document Change
4.6 Energy Efficient HD Audio (EEAudio) Mechanism

There is controller (HW) buffer <local fifo> in the Figure 14 HD Audio DMA
and buffering

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