Mar 24 2020, Mitsch has written:
Hi! I tried to configure an Ardour session to make a simple ambisonics environment with just 4 speakers - FL, FR, RL, RR.
A constellation of four speakers, like yours, is called quadrophonic. Yes, first oder ambisonics also has four channels, known as W, X, Y and Z. But these don't mark speakers, they mark pressure (overall loudness) and three directions. And so what ambdec does is decode one of the ambisonic formats into a particular speaker setup.
Following instructions from https://community.ardour.org/ambisonics, I added one mono track, bypassed the builtin panners and took (I think it was) "AMB 1.1 mono panner" (couldn't find "1h1v"), added 2 additional channels in "Master" to get 4 of them and let my mono channel take the "Master" as an output.
Again for clarity: there is a LADSPA plugin - also by Fons - called "AMB order 1,1 mono panner", which will do and is probably what you have used? This should be part of your distributions amb-plugins package. It will produce the proper W, X, Y and Z from a mono source.
Then I started ambdec and tried to make some sane connections, but the inputs are not called "w", "x" and "y", but only "0", "1", "2", and so on?
As far as I can see, that's OK. Connect your four outputs to the first four inputs of ambdec. I have tried it with a few presets and as far as I can tell, it always shows all 16 inputs, which should be needed for full 3rd order ambisonics. ... I hope this helps. Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * SoundCloud: https://soundcloud.com/jeanette_c * Twitter: https://twitter.com/jeanette_c_s * Audiobombs: https://www.audiobombs.com/users/jeanette_c * GitHub: https://github.com/jeanette-c But tell me what happens when it stops? <3 (Britney Spears) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx https://lists.linuxaudio.org/listinfo/linux-audio-user
