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[Bug 462007] Volume scale not linear for Intel Corporation 82801I ( ICH9 Family) HD Audio Controller (rev 03)
  • From: bugzilla_noreply@xxxxxxxxxx
  • Date: Fri, 9 Jan 2009 09:10:25 -0700 (MST)
  • Message-id: <20090109161025.64CCACC7D4@xxxxxxxxxxxxxxxxxxxxxx>

User tiwai@xxxxxxxxxx added comment

Takashi Iwai <tiwai@xxxxxxxxxx> changed:

What |Removed |Added
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--- Comment #8 from Takashi Iwai <tiwai@xxxxxxxxxx> 2009-01-09 09:10:24 MST ---
Check not about the volume percent but the dB value shown in alsamixer. Count
both Front and Master (just sum for dB). This is the total attenuation scale,
as 0dB means the maximal output level. At which level is it audible on your

The line-in problem is a different issue. Please open another bug report as
this is irrelevant from this.

The hardware provides a bigger volume resolution than others. However, since
the volume is represented in logarithmic (dB) manner, the scale doesn't match
with your intuition under a certain level. Normally, until a certain level, dB
level matches better than a linear scale. But, under the audible level, it's
fairly useless, because you can't hear much difference, e.g. between -32dB and
-96dB, both are almost silent.

So, fixing this issue means to restrict the hardware feature in the end. But,
maybe it's the only solution to satisfy normal users...

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