actually I wrote that before I thought the whole thing out :)
No, if you "tick" a pdlib instance you tick all the patches in it - so teh way to get different patches in different orders is to call up a separate Pd instance for each of them, and use "adc~" and "dac~" objects to get audio in and out - that incurs zero latency (once you've buffered 64 samples in the first place).
OR, within one pd instance, in libpd or in Pd, you can use switch~ objects, switched off, to control each sub-patch. Send the switch~ objects bangs in whatever orders you wish. In this scenario, tabsend~ and tabreceive~ would be the simplemt way to pass signals between them. In libpd you can do this zero-latency (just stuff your inpuits into arrays before sending all the tick messages and copy the results out afterward).
Within the Pd app, you can do teh same thing but you incur one tick extra latency, because copying the autio into the tables has to happen on the previous tick form the one on which you get the outputs back.
If you like danger, you can write an external tilde object that, for its "dsp" action, sends a message to teh patch that can "tick" the switch~ objects right in the middle of Pd/s DSP tick. This is not part of Pd because it could cause major confusion if general-purpose Pd messages got sent around in mid-tick.
cheers Miller
On Tue, Aug 20, 2019 at 11:55:58PM +0200, Roman Haefeli wrote:
On Tue, 2019-08-20 at 12:09 -0700, Miller Puckette wrote:
I think the way to do this in libpd is to open them all as separate patches within one instance of Pd (so that symbols are shared) and use "tabsend" and "tabreceive" to route signals to/from them, using shared names like "channel1" as both inputs and outputs so you can rearrange them in any order.
(Beware of allowing patches to _write_ andy of their output channels before reading all the input channels, if you're re-using the same channels as inputs and outputs :)
Do I understand right: When loading them as separate patches, you can dynamically re-order the signal flow by using [tabsend~]/[tabreceive~] (which you could with abstractions, too) _without_ adding latency?
And: When changing the symbol of [tabsend~] or [tabreceive~], is the DSP graph re-calculated?
Roman
Pd-dev mailing list Pd-dev@lists.iem.at https://lists.puredata.info/listinfo/pd-dev