[PD] Jack, netsend, realtime-mode and all the rest

[Roman Haefeli]

hi frank

"Frank Barknecht" <fbar at footils.org> wrote:

> however I may add, that "normal" Pd patches that
> don't use the network-connection are running very stable and without
> xruns.

i often noticed myself, that - when using audio and network stuff - the 
network stuff is the bottleneck, especially when sending a huge amount of 
data. i use more often [netclient]/[netreceive], which have a buffer of 4kB 
iirc, than [netsend]/[netreceive], but maybe it is the same issue with 
[netsend]. as far as i can tell, audio stucks as soon as the buffer is full. 
i assume the following is happening then: when the buffer of [netsend] is 
full and another object tries to send it a message, [netsend] won't accept 
the message, the object cannot execute its task and dsp-processing stops 
until the buffer of [netsend] gets free space.
i didn't do any testing, but you could try to [drip] the datastream, so that 
you get a stream with a more constant bandwidth. i don't have an idea, how 
difficult this could be, but maybe compiling pd with a bigger buffer in 
[netsend] helps a bit also.
all the above are only assumptions, but i would be very interested, if my 
suggestions will help, since i didn't do any serious testing myself.

good luck


roman