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            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - Stereo Profile is missing FAST TRACK ULTRA USB Audio card"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=92754#c16">Comment # 16</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - Stereo Profile is missing FAST TRACK ULTRA USB Audio card"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=92754">bug 92754</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://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=48f1b308cc66152eb6db66742dd0d08d888cda8d;hp=5c4cd46810cef8850b037fca9e38ffd43b0bff22">http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=48f1b308cc66152eb6db66742dd0d08d888cda8d;hp=5c4cd46810cef8850b037fca9e38ffd43b0bff22</a>

2.1 is for those asus n series notebooks which use external sonic master
subwoofer,  there is no hardware low pass filter 


<a href="https://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=f3ebf6b667b155f5fe6526bd70881c79e07d7874">https://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=f3ebf6b667b155f5fe6526bd70881c79e07d7874</a>


There is high pass filter for the front channels

<a href="https://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=a9059be749b6043d6cbc5b79652e8a4adda8994e">https://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=a9059be749b6043d6cbc5b79652e8a4adda8994e</a></pre>
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