<br><br><div class="gmail_quote">On Sat, Mar 21, 2009 at 12:30 PM, Fons Adriaensen <span dir="ltr"><<a href="mailto:fons@kokkinizita.net">fons@kokkinizita.net</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="im">On Sat, Mar 21, 2009 at 09:53:12AM +0300, alex stone wrote:<br>
<br>
> Ok, had the head in the amb manual and online reference material, when time<br>
> permitted, and have another question.<br>
><br>
> How do we handle early reflections when using an Ambisonic Jconv instance?<br>
><br>
> I'm experimenting with the yorkminster-amb.conf (wonderful clear sound), and<br>
> i don't yet understand how we create, or use, early reflections from the<br>
> same instance. (If indeed this is required.)<br>
<br>
</div>The York config includes the early reflections. Of course they<br>
are fixed for one source positions. Using the delay, offset and<br>
lenght paramters you could split it up so you have a separate<br>
input for the E.R. For example (only W channel shown, the<br>
rest are similar):<br>
<br>
<br>
# in out gain delay offset length chan file<br>
# ---------------------------------------------------------------------<br>
#<br>
/impulse/read 1 1 0.100 0 3480 4800 1 Minster1_000_WXYZ_48k.amb<br>
/impulse/read 2 1 0.100 4800 8280 0 1 Minster1_000_WXYZ_48k.amb<br>
<br>
The first line selects the first 100 ms (which will contain the E.R.),<br>
the second line is the reverb tail without the firtst 100 ms.<br>
If you send the same signal to inputs 1 and 2 the result will<br>
be the same as before, but now you can set each level separately.<br>
For a large space such as York Minster there would be discrete<br>
reflections even well after 100 ms, so you could increase the<br>
4800 and 8280 (= 3480 + 4800).<br>
<br>
Ciao,<br>
<br>
--<br>
FA<br>
<br>
Laboratorio di Acustica ed Elettroacustica<br>
Parma, Italia<br>
<br>
Io lo dico sempre: l'Italia è troppo stretta e lunga.<br>
<br>
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<a href="http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user" target="_blank">http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user</a></blockquote><div><br><br>Fons, thank you very much.<br><br>Great explanation, and i'll spend today experimenting not only with the York.conf, but others too.<br>
<br>One more question. Can this also be applied to standard stereo IR's, for example, those examples you've generously included with Jconv?<br><br>Alex. <br></div></div><br><br clear="all"><br>-- <br>Parchment Studios (It started as a joke...)<br>