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

[Raymond Yau]

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



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

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