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Jean-Baptiste Kempf wrote:<br>
<blockquote cite="mid:20110513203748.GA12410@videolan.org" type="cite">
<blockquote type="cite">
<pre wrap="">I played a little bit with the "headphone virtual spatialization"
option in the VLC player. It seems to mix somehow the audio channels
</pre>
</blockquote>
<pre wrap="">Arf. :D
</pre>
<blockquote type="cite">
<pre wrap="">down to the headphone channels, however, I could not find any
description about the algorithm. I also could not find any
options/settings for that. Can you help with some of description?
</pre>
</blockquote>
<pre wrap="">
<a class="moz-txt-link-freetext" href="http://git.videolan.org/?p=vlc.git;a=blob;f=modules/audio_filter/channel_mixer/headphone.c;hb=HEAD">http://git.videolan.org/?p=vlc.git;a=blob;f=modules/audio_filter/channel_mixer/headphone.c;hb=HEAD</a>
</pre>
</blockquote>
<br>
Thanks for the pointer. It seems like there is just a delay-and-gain
implemented. I think that this a good point to start.<br>
<br>
<blockquote cite="mid:20110513203748.GA12410@videolan.org" type="cite">
<pre wrap="">
seem to show 3 options, one integer (dim) and 2 booleans (one of which
I think is useless
</pre>
</blockquote>
<br>
How do I use/set these options? Are these command line parameters?<br>
<br>
<blockquote cite="mid:20110513203748.GA12410@videolan.org" type="cite">
<pre wrap="">
Audio filters would be welcome, and not only HRTF, but upmixing or
SRS-WoW-like filters
See
<a class="moz-txt-link-freetext" href="http://wiki.videolan.org/Documentation:Hacker%27s_Guide/Audio_Filters">http://wiki.videolan.org/Documentation:Hacker%27s_Guide/Audio_Filters</a>
and
<a class="moz-txt-link-freetext" href="http://wiki.videolan.org/Documentation:Hacker%27s_Guide">http://wiki.videolan.org/Documentation:Hacker%27s_Guide</a>
</pre>
</blockquote>
<br>
Thanks for the guides. I'd like to focus on HRTF implementation first.
Maybe we'll look later how SRS-WoW actually works. <br>
<br>
Another general question: I'd like to adapt the filtering to the actual
head position/orientation in real time. I thought about capturing the
head information with web-cam using openCV or similar - is time-variant
filtering possible within the current audio-filter framework? As for
the human resources, a student could work on that in his master thesis,
so spending let's say 4 to 6 months. Do you think is this practicable?<br>
<br>
Regards,<br>
Piotr<br>
<br>
<br>
<br>
<div class="moz-signature">-- <br>
Piotr Majdak<br>
Psychoakustik und Experimentelle Audiologie<br>
<a href="http://www.kfs.oeaw.ac.at">Institut für Schallforschung</a><br>
<a href="http://www.oeaw.ac.at/">Österreichische Akademie der
Wissenschaften</a><br>
Wohllebengasse 12-14, 1040 Wien<br>
Tel.: +43 1 51581-2511<br>
Fax: +43 1 51581-2530</div>
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