[mythtv] [mythtv-commits] Ticket #4775: Change defaut audio upmix setting; add help text

[Adam Egger]

On Mon, Feb 25, 2008 at 10:46 AM, MythTV <mythtv at cvs.mythtv.org> wrote:

>>   * Changes the default upmix setting to "Passive," which requires the
>>   least amount of CPU hoursepower and is thus the safest choice.
>>  * Adds to the help text for the setting to somewhat explain each
>>   setting's CPU needs.

> 19	+                "'Passive' is the least demanding on the CPU. "
> 20	+                "'Active Simple' is more demanding and 'Active Linear'
> 21	+                "is the most demanding (but highest quality)."));

Could you guys explain the difference between the different upmix
settings? This question comes up quite frequently on IRC and everyone
just wants to know how an upmixed 2ch sound can be lower or higher
quality?
Is it possible to approximately tell the CPU needed for each of the settings?

Thanks,
Adam