sluggo wrote:The laptop's output is biased off of (at least) a 3.3V supply, so a clipped line level output is not possible. Besides, the laptop's volume controls are attenuators, so they can't produce a clipped output.
Well it seems most laptop's volume control (including mine) is actually Windows master volume control, so it seems what applies to laptop volume control also applies to Windows master volume control. So of Windows volume control are attenuators, do they yield unity gain (0db) at 100% volume? And if it's not the case, what at volume percentage does it yield unity gain?
It seems it also depends on the sound card/codec being used. How about Realtek? More specifically, Realtek ALC892 used in Gigabyte H77N-WIFI mobo? Where could I find such information?
After Googling a little, I found the manual for Realtek ACL658 instead of ACL892. The Analog Performance Characteristics table says the Master Volume (FRONT/SURR/CENT/LFE) attenuation range has the minimum value of 0dB and the maximum value of -94.5dB. Huh? Isn't that supposed to be the other way around? But fine, let's assume the minimum and maximum value in the manual actually goes the other way around, which means the maximum attenuation range is 0dB. It means 100% volume control is safe, doesn't it? (ie no clipping) So it means the master volume control outputs unity gain (0dB at 100%), am I correct?
But then again, is the maximum gain value the same (0dB) for all Realtek version?