On Wed, Jul 29, 2009 at 9:24 AM, Lennart Poettering <mzerqung@xxxxxxxxxxx> wrote:
On Wed, 29.07.09 06:48, Jeff Garzik (jgarzik@xxxxxxxxx) wrote:Maybe since the times you worked on audio drivers the design of the
>
> Karel Zak wrote:
>> On Tue, Jul 28, 2009 at 10:07:32PM +0200, Lennart Poettering wrote:
>>> On Tue, 28.07.09 15:48, Bill Nottingham (notting@xxxxxxxxxx) wrote:
>>> Yes. You cannot select them as record source, you cannot mute or
>>> unmute them, you cannot change their volume. "CD", "PC Speaker",
>>> "MIDI" and so on are just obsolete.
>>
>> This reminds me your note:
>>
>> https://tango.0pointer.de/pipermail/pulseaudio-discuss/2009-July/004519.html
>>
>> PA does not make use of hardware mixing. And I don't plan to change
>> that. It's obsolete technology. CPUs these days come with extensions
>> such as MMX or SSE precisely for speeding up DSP tasks such as PCM
>> mixing. This is way more flexible that hw mixing, and definitely the
>> way to the future, both on the desktop and on embedded envs as well.
>>
>>
>> The "obsolete technology" -- who made this decision? Is it your private
>> opinion or any suggestion from sound card manufacturers?
>>
>> It seems that HW companies still produce the "obsolete technology".
>
> Quite agreed [says a former kernel audio driver maintainer], and I will
> go even farther:
sound cards changed a little and stuff like SSE became largely available?
Hear hear, Mr. Garzik is the the old experienced wise man of audio,
> It is completely stupid to waste host CPU on a task that can be
> offloaded in parallel to dedicated audio hardware.
>
> If the user intentionally purchased expensive audio hardware with nice
> hardware mixing, do not subvert the user's intentions by ignoring such
> nice hardware.
>
> Any developer who claims "always use software mixing" or "always use
> hardware mixing" is a young, inexperienced fool. There are valid
> situations for both choices.
who knows so much more about audio than any of the audio guys at
Microsoft or Apple.
Happy to take patches.
Lennart
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