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Adjust 'locked' volume levels when using optical audo
Authored by: tooki on Jan 15, '09 02:35:38AM

Adjusting volume at the digital signal stage requires re-computing the sample values, and results in loss of resolution and/or clipping of the waveform.

Your receiver is adjusting volume by controlling the gain of the amplifier stage -- the signal isn't adjusted digitally.



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Adjust 'locked' volume levels when using optical audo
Authored by: frgough on Jan 15, '09 07:58:06AM

That doesn't make any sense. Digital is digital. You don't need to resample the bits, you just need to apply a modifier to the waveform equation multiplying sinx by 2 doesn't distort the sin wave. Time to do some research, I guess.



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Adjust 'locked' volume levels when using optical audo
Authored by: frgough on Jan 15, '09 08:04:44AM

I found the answer from a link another commenter sent me. The signal is not distorted as long as your gain is done in steps that don't result in rounding errors. So it is possible to adjust volume on a digital signal without creating distortion, just not trivial.



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