[Alsa-user] snd_pcm_prepare() after snd_pcm_drain()?

[Greg L. <gr...@li...>]

I changed computers and Alsa started working a little differently,
which is puzzling, because I pulled the disk drives and soundcard
and just moved them over to the new system.  The exact same
software, same soundcard.

Here is what's different.  On my old computer, when I wanted my
program to play a new song, I called
	snd_pcm_drain()
	snd_pcm_prepare()
	snd_pcm_reset()
But now, calling snd_pcm_prepare() gives a "device busy" error.
Simply omitting the call to snd_pcm_prepare() seems to work fine,
so I'm back in business.

But which is right?  Or if different systems really do work
differently, how can I program a version that will work for
everyone?

Thanks for any suggestions,
Greg