Mac Pro and Audio

[Chad Leigh]

On Nov 19, 2006, at 1:47 PM, Finlay Dobbie wrote:

> On 19/11/06, LuKreme <kremels at kreme.com> wrote:
>> When i press the volume buttons on my keyboard I get a quartz affect
>> showing the volume at full level and a "do not" symbol underneath.
>>
>> The audio out is set to "Line Out" and I have speakers connected to
>> the machine, but I can't change volume levels.
>
> That's because line out is at, uh, line level. You need an amplifier.

That is irrelevant.   You should need an amplifier to make use of the  
sound, perhaps, as line level is not that "hot" but there is nothing  
about line level that says that it is a constant level and cannot  
vary.  Volume adjustments can be made to line level outputs (in  
general -- I do not know what the issue is here).

Chad