Clip-level question
Clip-level question
- Subject: Clip-level question
- From: Glenn Zelniker <email@hidden>
- Date: Tue, 3 Jun 2008 18:41:15 -0400
Sorry if this has been asked before, but I can't seem to find a
satisfactory answer.
I am trying to determine the level at which a sine wave will produce
audible clipping. To wit, I am playing a sine wave (1 kHz @ -1 dBFS)
from disk using a small test program I wrote. I convert these samples
to floats and apply gain before sending the samples off to the
output. I've found that depending on the position of the system
volume-control, the amount of gain I can apply varies before clipping
occurs. This would seem to indicate that the system volume-control is
operating pre-DAC, no? But I've yet to find any kind of calibration
information that explains the peak level that a sine wave can achieve
without resulting in clipping, as a function of the position of the
system volume-control. With the system volume set to maximum, it
appears that I can send out values larger than 30 dB above what I
would have thought was full scale (relative to +/- 1.0 floats).
So, can anyone tell me what the peak sine clip level is as a function
of the system volume control?
Thanks,
Glenn Zelniker
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