Re: [LAD] Ambisonic Effect processing

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To: Fons Adriaensen <fons@...>
Cc: Linux Audio Developers <linux-audio-dev@...>
Date: Wednesday, January 11, 2012 - 12:51 pm

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On Wed, Jan 11, 2012 at 3:59 AM, Fons Adriaensen wrote:

> But in most cases such effects would be performed on the mono channels

Thanks for that.

You need a reverb that produces B format, 100% wet. It is driven by

Yes, this is all easily possible, no problems.

> You can use zita-dpl1 for B-format peak limiting, and zita-rev1 for

While reading around I came across zita-rev1, but it seem has stereo
inputs, duplicate the mono signal to both inputs, or would you advise to
drive it with a stereo signal? I could pan the mono->stereo based on the
ambi panner control, and then send the stereo to zita-rev1, and mix in the
returned B-format?

Just loaded up zita-dpl1 -k 4, using it as an insert is no problem :)
Cheers, -Harry

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On Wed, Jan 11, 2012 at 3:59 AM, Fons Ad=
riaensen <fons@=
linuxaudio.org
> wrote:

But in most cases such effects would be performed on the mono channels
before they are mixed into B-format.Than=
ks for that.
You need a reverb t=
hat produces B format, 100% wet. It is driven by
post-fader auxiliary sends on the mono channels before they are panned
and mixed, and the output is added to the B-format master bus.
Ideally you also need to control the relative delay of the reverb send
and the input to the panner (direct sound) - it depends on distance.Yes, this is all easily possible, no problems.=A0<=
blockquote class=3D"gmail_quote" style=3D"margin:0pt 0pt 0pt 0.8ex;border-l=
eft:1px solid rgb(204,204,204);padding-left:1ex">

You can use zita-dpl1 for B-format peak limiting, and zita-rev1 for
reverb, or use one of the AMB reverbs available for jconvolver.
I've also an AMB capable compressor but this is not yet released.While reading around I came across zita-rev1, but it seem has stereo inpu=
ts, duplicate the mono signal to both inputs, or would you advise to drive =
it with a stereo signal? I could pan the mono->stereo based on the ambi =
panner control, and then send the stereo to zita-rev1, and mix in the retur=
ned B-format?
Just loaded up zita-dpl1 -k 4, using it as an insert is no problem :)Cheers, -Harry

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Messages in current thread:
[LAD] Ambisonic Effect processing, Harry van Haaren, (Wed Jan 11, 12:07 am)
Re: [LAD] Ambisonic Effect processing, Fons Adriaensen, (Wed Jan 11, 11:59 am)
Re: [LAD] Ambisonic Effect processing, Harry van Haaren, (Wed Jan 11, 12:51 pm)
Re: [LAD] Ambisonic Effect processing, Fons Adriaensen, (Wed Jan 11, 1:53 pm)
Re: [LAD] Ambisonic Effect processing, Harry van Haaren, (Wed Jan 11, 2:22 pm)
Re: [LAD] Ambisonic Effect processing, Fernando Lopez-Lezcano, (Wed Jan 11, 1:40 am)