Jorn, Fons, my continued thanks for the help and shared knowledge.<br><br>Alex.<br><br><div class="gmail_quote">On Wed, Jan 21, 2009 at 2:16 AM, Jörn Nettingsmeier <span dir="ltr"><<a href="mailto:nettings@folkwang-hochschule.de">nettings@folkwang-hochschule.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"><div class="Ih2E3d">alex stone wrote:<br>
> A question here gentlemen.<br>
><br>
> With an WXYZ setup, what do those represent? Left/Right/Front/Rear?<br>
> So any signal in would be a composite of position based on the strength<br>
> of gain between 2 or more points?<br>
<br>
</div>are you familiar with M/S stereo miking? if not, get a figure of eight<br>
and play with it. it's great to control the stereo width of a recording<br>
during mixdown. once you've got a feel of the concept (matrixing a fig8<br>
and a mono signal), add two more fig8s for up/down and front/back, and<br>
there you go: first-order ambisonics.<br>
<br>
in practise, soundfield mikes work differently because you can't squeeze<br>
four capsules into the same point, but after some wizardry, the<br>
microphone's output (called a-format) is converted into WXYZ b-format,<br>
which is exactly m/s extended to 3d: a mono component W, a left/right<br>
difference signal X, and front/back and up/down difference signals Y and Z.<br>
<br>
<br>
best,<br>
<font color="#888888"><br>
jörn<br>
<br>
</font></blockquote></div><br>