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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Microsoft LifeChat LX-3000 USB Audio Headset DB issue with Volume Scale"
href="https://bugs.freedesktop.org/show_bug.cgi?id=46236#c19">Comment # 19</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Microsoft LifeChat LX-3000 USB Audio Headset DB issue with Volume Scale"
href="https://bugs.freedesktop.org/show_bug.cgi?id=46236">bug 46236</a>
from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
<pre><a href="http://en.wikipedia.org/wiki/Audio_bit_depth">http://en.wikipedia.org/wiki/Audio_bit_depth</a>
24-bit digital audio has a theoretical maximum SNR of 144 dB, compared to 96 dB
for 16-bit
Signal-to-noise ratio and resolution of bit depths# bits SNR Possible
integer values Base ten signed range
4 24.08 dB 16 −8 to +7
8 48.16 dB 256 −128 to +127
16 96.33 dB 65,536 −32,768 to +32,767
20 120.41 dB 1,048,576 −524,288 to +524,287
24 144.49 dB 16,777,216 −8,388,608 to +8,388,607
32 192.66 dB 4,294,967,296 −2,147,483,648 to +2,147,483,647
48 288.99 dB 281,474,976,710,656 −140,737,488,355,328 to
+140,737,488,355,327
64 385.32 dB 9,223,372,036,854,775,807 −4,611,686,018,427,387,903 to
+4,611,686,018,427,387,902
the volume control of livechat is about 4 bit while the volume control is just
16 bit plus -inf
are your livechat confine to USB audio 1.0 or 2.0 ?</pre>
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