i'm having trouble running PD under jack on OSX.
the patch i'm working with is very cpu intensive, but i optimized it as far as possible. when i run it with portaudio now, things are fine. i have to use high delay times of about 90ms to have things running smooth, but that's fine for me because it's more like soundscapeish stuff that don't need fast control response.
but when i use jack to route the outputs into ardour i get the typical audio cut-outs from too low latency (at 2048 buffersize maximum), and there seems to be no way to increase latency to the point where things work out under jack. at the same time though, cpu goes significantly down with jack, but still i get the clicks. very strange.
i've been told that the maximum latency is hardwired by the audio interface, but why can i increase the delay under portaudio to whatever amount i wish to have things working, but not under jack?
i hear that jack is supposed to be a "low latency audio driver" but for some reason it ruins the performance of my patch.
is there an alternative way to route 8 to 10 channels of audio into ardour?

thanks for any advice!

you can maybe try 'soundflower' from cycling74 (it's free)

http://cycling74.com/products/soundflower/

thanks, but i tried that already.
the problem is that jack only sees 2 input channels from soundflower, even in 16 channel mode. and the only way into ardour is jack.

i just noticed i can also go into jack when i'm in PDs portaudio mode, but it also won't allow me to use more than 2 channels. if i choose more than 2 in the options PD won't connect and eventually crashes.

this problem makes it impossible to send any kind of "heavier" patch into more than two channels for recording, even when it works fine in PD alone. real bummer, after so much work on the patch. i hope someone has any advice.