Thanks for the suggestions, i'll deffinately be looking into your suggestions (i'm not familiar with some of the terms ). For now i must deal with what i have at home, which is an acer netbook w/ windows Xp @ 1.6 GHz, 1GB RAM btw! No external soundcard as of yet. i should get (in theory) a similar result to Pierre's so i'll be trying that approach for now. i also have access to new macpros at my university and a motu 8 channel interface so i'm hoping for much better results there.
As far as upgrading goes, i'm considering building a pc dedicated to my audio needs, probably running a linux distro, any recommendations would be much appreciated. Perhaps i should include the dedicated DSP board that Derek mentioned. Can those be used to process pd patches? On Sun, Jan 31, 2010 at 9:20 AM, Pierre Massat <[email protected]> wrote: > Hi Jeffrey! I ve been trying to minimize latency in Pd for a year now, > experimenting with various OS and hardware. I m using Pd for the same > purpose, that is live processing of electric instruments (mainly a guitar). > I would recommend using a Linux distro, because they have "realtime" > kernels, and the JACK server, plus you can get the hid object in Pd (which > does not exist on windows). If you want to play live you want to go for > latencies below 7 or 6 ms. I get a 5 ms latency on an old Dell laptop (1 > Ghz) with the latest Fedora with the CCRMA realtime kernel. > I can also give you a couple of hints about the interface (I personnaly > have hacked a cheap gamepad and it works great). You can reasonably expect > to get a low-latency live set at a very low cost, provided that you have a > quite recent laptop to work with. > > Pierre > > 2010/1/31 Derek Holzer <[email protected]> > >> "Unnoticeable" latency usually refers to the musician not noticing the >> difference in time between when they press the key and when the sound comes >> out. Any time you add a delayed signal to the original signal, you will >> notice it. The "slap-back" happens at longer latencies, but at shorter >> latencies you will hear *very* noticeable comb-filtering. And since no >> computer-based solution is latency-free, I think you need to re-examine what >> you are expecting Pd to do. Either that, or go with a dedicated DSP board >> (and learn the accompanying programming!) which would give you a more >> guitar-pedal-like "zero-latency" system. >> >> Maybe Marco Donnarumma could give a few words here on processing >> instruments live. His set uses an electric bass through Pd. My guess is that >> even the un-processed signal goes through Pd to avoid echos or comb >> filtering due to latency. >> >> Best, >> Derek >> >> Jeffrey Concepcion wrote: >> >> * in terms of processor capacity, hardware, and sound card >>> >>> configuration, what would be the minimum requirements to achieve >>> unnoticeable latency (not hear the affected signal as a slap-back >>> type of effect)? i've read that 11ms can be achieved and is >>> unnoticeable. >>> >> >> -- >> ::: derek holzer ::: http://macumbista.net ::: >> ---Oblique Strategy # 18: >> "Balance the consistency principle with the inconsistency principle" >> >> >> _______________________________________________ >> [email protected] mailing list >> UNSUBSCRIBE and account-management -> >> http://lists.puredata.info/listinfo/pd-list >> > > -- www.avmachinists.org Puerto Rico based Art Collective/ Non-Profit Org
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