Hello all,

I'm working on building a multichannel surround sound processor for a university project. This involves taking a description of each sound source in the scene (i.e. audio signal, position) and processing it for a large number of output channels.

From my current limited experience of pd and the literature I have read, it seems the way to do this would be to duplicate all the processes as many times as they are needed within the patch. This seems awfully inelegant though, and limits the flexibility of the patch.

I was wondering if there is an automatic way to carry out lots of parallel processes at once. For example I have an arbitrary process "process~" and I have 4 input signals "s#" and 4 input numbers "f#" and I want to receive 4 outputs "s#'".

[s1 s2 s3 s4] [f1 f2 f3 f4]
| |
| _________
process~
|
|
[s1' s2' s3' s4']

Which is equivalent to...

s1 f1
| |
| |
process~
|
|
s1'

s2 f2
| |
| |
process~
|
|
s2'

etc...

I hope I've made myself clear, please let me know if not.

Thanks in advance!

Ben

if you create your process~ function to process one item. treating the right inlet as cold and the left inlet as hot (i.e. when data is sent through the left inlet, perform action (based on the last received right inlet input))

then for every one you put in you get one out. if you have 4 audio signals then send them in one after the other.

Ok thanks, could you tell me how I send in 4 audio signals one after another and get 4 signals back out again?

You did not make yourself clear but I think what you should make clear is that loading instances of an abstraction is different to having duplicate code within an abstraction on how the code is handled and when things change. (Make a patch/abstraction - process~.pd - and call it as many times as you need it within your other patch/abstraction −4process~.pd - and then use 4process~ once in your final code/patch. If you use [s~] and [r~] in your process~ you should use $0 to avoid duplicate destinations.