Just a quick question,
I am going to be using spatialistaion. I know there is a module in max msp called spat where, on shifting a sound from one speaker to the next speaker, or on creating the typical circular movement around the concert hall at different speeds with the added comfort of creating accellerandi and ritardandi,

"spat", i'm told, must be given the following parameters:

1.channels involved, (the total number of channels (1-8),
2. order of loudspeaker change (ie 1-2-3-4-5-6-7-8-1-2... etc.)),
3. the speed of loudspeaker-to-loudspeaker transition (4 seconds as a target ramp time),
4. target change of speed (in this case going from 4 secs speaker transition to 2 secs speaker transition, ie accelerando to double speed)
5. over how much time (ie. 30 secs accellerando)

...i think that's all the parameters involved.

Is there a similar object, in Pd, or would I have to create a chain of abstractions involving specified no. of channels with ramp times?

cheers!
alistair

the closest thing to what yr talking about i can find is Vbap (http://www.acoustics.hut.fi/software/vbap/Pure_Data/)

However, I have not had much joy with this at all. By joy i mean the the exact opposit to my speakers being silent. However, you may be more adept at these things

I am currently making a surround sound mixer abstraction in pd for use in a live performance. Basicly it has a grid you can pan around and a series of preset movements, plus a way to record those movements. I can send it you when its finnished if its any help. It won't be containing any clever doppler or azimuth stuff im affraid, thats waaaaay over my head. (you see what i did there, a bad ambisonics pun.....god i need to get off this computer)

bd