Well now I am facing a problem, I guess I was too excited to really check whether this option worked properly or not! The problem is that I have a patch in Pd, where I am using adc~, writesf~ to write the streaming data into wave files. When I initialize Pd, it recognizes the aggregate device, I click on it and select the no. of channels to the total no. of inputs I have with the aggregate device, say 8. When I start the recording and finish it. Open the wav files in audacity, only two channels seems to be active the rest have nothing in them! Can someone, who has used this feature to do recording with Pd please let me know, what I am doing wrong!. thanks tania
On Dec 19, 2007 2:00 AM, simon wise simonxwise@hotmail.com wrote:
On 19 Dec 2007, at 9:51 AM, Roman Haefeli wrote:
hey, that is cool to know (as a non-osx user, i wouldn't have expected something like that to exist, but i think, i know quite some people who could benefit from that). just in case you know: do you have an idea how this system deals with the fact, that each of this cheapo soundcards have their own clock? does it use one as the master clock and does apply a samplingrate conversion to the other in order to sync it? i am asking, because i would like to know, if any decrease in sound quality is expected when you use aggregate.
I've used it a couple of times to get some extra outputs from a laptop, and it has worked fine but I haven't used it extensively. There are options to choose which clock source is used, and options (for each physical device) to re-sample the audio so it seems that it will re-sample if you choose, or not if it works ok without - I guess that would depend on things like the abilities of the cards and their drivers.
It has been around for a while - maybe introduced in OSX 10.3???
simon