<div class="gmail_quote">On Fri, Jun 18, 2010 at 1:41 PM, <span dir="ltr"><<a href="mailto:fons@kokkinizita.net">fons@kokkinizita.net</a>></span> wrote:<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
If that soundcard really has the dynamic range that the<br>
sales blurb claims it has, then its output level will be<br>
a lot higher than what is expected by the average non-pro<br>
amplifier, including 'audiophile' ones.<br></blockquote><div><br></div><div>Shouldn't the output level be the same, and only the resolution improved -- whatever is the standard peak-to-peak voltage</div><div>
for consumer audio (~ 2vpp?). Otherwise, we'll risk electrocution when they invent 64 bit DACs :-)</div><div><br></div><div>What a strange soundcard: i'd rather buy something with only digital outs and connect an external DAC.</div>
<div>W/r/t the "AV100" chip, I wonder if there's bugs lurking given the fact that it's a relatively new and probably not widely used card:/chip.</div><div><a href="http://alsa-project.org/main/index.php/Matrix:Module-virtuoso">http://alsa-project.org/main/index.php/Matrix:Module-virtuoso</a> </div>
<div><a href="http://alsa-project.org/main/index.php/User:ClemensLadisch#CMI8788_driver_status">http://alsa-project.org/main/index.php/User:ClemensLadisch#CMI8788_driver_status</a></div>Xonar Essence ST AV100 Details[PCI] [ANALOGio] [RCAo] [TOSo] [24bit] [192kHz]<br>
front panel mic input does not work ALSA 1.0.22 or kernel 2.6.33<br><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"> Check the digital level with e.g.<br>
jkmeter, For classic use the K20 mode and ensure you<br>
have a level around 0 dB. For pop use the K14 mode<br>
and again ensure you have around 0 dB.<br></blockquote><div><br></div><div>Many thanks for pointing out jkmeter ( jkmeter-0.4.0-1.fc12.ccrma.x86_64 ). I had to read</div><div>/usr/share/doc/jkmeter-0.4.0/README to get an idea of what you meant by K14 and K20:</div>
<div>..........</div><div><div>Instead of providing extra gain for the RMS level,</div><div>the K-meter displays it on the same scale as the</div><div>digital peak level, but puts the '0dB' mark and the</div><div>
color change well below the OdB full scale level.</div><div>For the K-20 meter it is 20dB down, for the K-14</div><div>this is (surprise !) 14 dB. </div></div><div>.........</div><div><br></div><div>jkmeter feature request -- MIDI AGC: A MIDI output (!) which in it's most simple form, sends a note-on/note-off on the midi channel where clipping has occurred (then you can use something like Dominic Sacré's <a href="http://das.nasophon.de/mididings/">http://das.nasophon.de/mididings/</a> to route to a mixer such as envy24control).</div>
<div>In a more useful form, each clip would reduce the value of a MIDI controller (one per midi channel) by a configurable amount. </div><div>A midi input (!) would read output slider values from a mixer like "envy24control -m -M":</div>
<div><div><span class="Apple-tab-span" style="white-space:pre"> </span>-m, --midichannel<span class="Apple-tab-span" style="white-space:pre"> </span>midi channel number for controller control</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>-M, --midienhanced<span class="Apple-tab-span" style="white-space:pre"> </span>Use an enhanced mapping from midi controller to db slider</div>
</div><div>The midi output of jkmeter++ would then decrement the given controller in envy24control by a configurable amount each time clipping occurred.</div><div><br></div><div>.......</div><div><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; ">
<br class="Apple-interchange-newline">The correct alignment procedure would be:<br><br>1. Play a piece of music representative of what you<br>normally listen to.</blockquote><div><br></div><div>I usually prefer testing fine soundsytems with Muppet heavy metal (</div>
<div> <a href="http://www.youtube.com/watch?v=HKGiOY72ru4&feature=related">http://www.youtube.com/watch?v=HKGiOY72ru4&feature=related</a> )</div><div>or black death metal ( <a href="http://www.youtube.com/watch?v=Qvsq6_8Hzo8&feature=related">http://www.youtube.com/watch?v=Qvsq6_8Hzo8&feature=related</a> ). (PS: j/k :-) )</div>
<div><br></div><div>-- Niels</div><div><a href="http://nielsmayer.com">http://nielsmayer.com</a></div></div></div>