Audio Render Chop limitations?

[bwheaton]

How many speakers can I handle in the audio render chop?
There’s no accounting for subs, it looks like?

Anyone done anything cool with it? I’m presuming that animating source and listener position is normal?

Bruce

[nettoyeur]

hey bruce,
Yes animating source and listener is the whole crux of this thing.
I don’t have something super cool, but see some explanation of the Audio Render CHOP and an example with 16 speakers I posted a a while back here:

CHOP Audio Renderer

hey @rearnra , welcome to the forum! in the Parameter Dialog of the Audio Render CHOP, top left, you’ll see a question mark. Click that and you get to it’s help page. There you’ll see the Audio render takes a mono sound audio source as input, and a 3d transform for both a single Listener (= the ‘person’ who is hearing the sound) and a single Source (the thing that is generating the sound). So to translate to real world terms, the Listener is you and the Source a ringing phone. You can run aro…

For checking the example on your headphones switch Audio Render CHOP to binaural and add a Audio Device Out CHOP.

[bwheaton]

So - tested and useful with 16 speakers at least? Thank you - good to know.

Anyone tried with more than 16 speakers?
Any idea how ‘heavy’ it is? If I have 16 different sounds to come from 16 different places, am I asking for trouble (16 instances of the audio render chop)?

[B_R_M]

Hi nettoyeur, I’m looking for a way to listen to an ambisonic recording in an openvr HMD. I’ve been trying to feed a 4 chanel ambisonic recording into audiorender then outputting an ambix signal for listening with an openvr HMD. The sound is coming out mono. From what you say here if audiorender takes a mono source I should maybe have a seperate audiorender chop for each of the 4 channels of the ambisonic recording with the 4 sound source objects placed at the position of the 4 mics used to make the recording. If this is correct there may be a phasing problem or perhaps not if the listener is at position 0,0,0 and the source objects were an identical distance from the listener. If so would there be a way to stop the phasing?

[B_R_M]

Hi I’ve solved the problem I wrote about yesterday, it dawned on me what you said about audiorender taking a single channel as it’s source. I had been using a 4 channel ambisonic recording as source and expecting the 16 ch ambix output to position itself around the geo sphere. So I put each of the 4 channels to a different audiorender with 4 geo’s as sound source then altered the positions of the geo’s around the sphere to reflect the positions of the ambisonic mics used to make the recording. It works well but It might be better if I could extrapolate to 16 ch 3rd order ambisonic. I’ll have a go but it might be too processor heavy.