sonci
500+ Head-Fier
- Joined
- Apr 3, 2008
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It seems obvious for PC audio that when using an external amplifier for speakers or headphones the master volume should be 100%, and you should control volume by the amplifier,
in theory this way should guarantee the best SQ possible,
Well this is true for a lot of cards where the max volume corresponds to the 0dB level, like a lot of professional cards, you set it and forget it,
but a lot of other cards don't show in software the 0 db level, and some of them apply o lot of gain at the max volume,
for example Auzentech Prelude configured at 100% volume often distorts and go in clipping, proof that the 0 dB level is way before the max volume,
For configuring the 0dB level in these cards I use a simple method though not sure if its correct,
I just download some pure tone test files in 1Khz or 500Hz,(http://www.ronelmm.com/tones/) play them through Foobar- Asio (Audio Creation Mode) with the volume at 50%(windows volume, foobar`s is always 100%), then measure the outputs of the cards with a RMS multimeter (AC with V scale) (+ and - of the RCA plug)
normally at 0dB level volume the card should output 1V rms, so I just raise the volume until I measure 1V with the multimeter, for the Prelude the 0dB level is around the 82% volume, so this should be the optimal level for bit perfect output,
What do you think? What are your volume settings for the other cards?
in theory this way should guarantee the best SQ possible,
Well this is true for a lot of cards where the max volume corresponds to the 0dB level, like a lot of professional cards, you set it and forget it,
but a lot of other cards don't show in software the 0 db level, and some of them apply o lot of gain at the max volume,
for example Auzentech Prelude configured at 100% volume often distorts and go in clipping, proof that the 0 dB level is way before the max volume,
For configuring the 0dB level in these cards I use a simple method though not sure if its correct,
I just download some pure tone test files in 1Khz or 500Hz,(http://www.ronelmm.com/tones/) play them through Foobar- Asio (Audio Creation Mode) with the volume at 50%(windows volume, foobar`s is always 100%), then measure the outputs of the cards with a RMS multimeter (AC with V scale) (+ and - of the RCA plug)
normally at 0dB level volume the card should output 1V rms, so I just raise the volume until I measure 1V with the multimeter, for the Prelude the 0dB level is around the 82% volume, so this should be the optimal level for bit perfect output,
What do you think? What are your volume settings for the other cards?