On Sat, May 15, 2021 at 06:49:28AM -0600, Paul Davis wrote:
Also, at that time, ALSA didn't yet properly
support the mmap'ed mode ...
it was under development but not finished (as evidenced by the way it could
not handle non-interleaved devices like the RME digi series.
That's another thing that puzzles me...
At the time audio cards like the RMEs would be sitting on a PCI bus,
and the mmap area could/would be actual hardware buffers.
So then, mmapped mode would be the 'natural' way, with read()/write()
being implemented on top of it. But apparently it was the other way