From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Clemens Ladisch" <cladisch@fastmail.net>
Subject: Re: Using speaker-test for sound cards which dont
 support mmap
Date: Thu, 12 Jul 2007 09:08:56 +0200
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To: "Pharaoh ." <pharaoh137@gmail.com>, alsa-devel@alsa-project.org
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Pharaoh . wrote:
> Is it possible to use speaker-test for sound cards which do not support
> mmap?

If a sound card does not support DMA, the driver has to copy the samples
from ALSA's buffer to the hardware with some other mechanism.  However,
there is always the ALSA buffer that can be mmap()ed to userspace.

>>From the point of view of userspace applications, all sound cards
support mmap.


Regards,
Clemens