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. <br>
<br>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?<br>
<br><div class="gmail_quote">On Sun, Jan 31, 2010 at 9:20 AM, Pierre Massat <span dir="ltr"><<a href="mailto:pimassat@gmail.com">pimassat@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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). <br>
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. <br>
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.<br>
<br>Pierre<br><br><div class="gmail_quote">2010/1/31 Derek Holzer <span dir="ltr"><<a href="mailto:derek@umatic.nl" target="_blank">derek@umatic.nl</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div><div></div><div class="h5">
"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.<br>
<br>
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.<br>
<br>
Best,<br>
Derek<br>
<br>
Jeffrey Concepcion wrote:<br>
<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
* in terms of processor capacity, hardware, and sound card<div><br>
configuration, what would be the minimum requirements to achieve<br>
unnoticeable latency (not hear the affected signal as a slap-back<br>
type of effect)? i've read that 11ms can be achieved and is<br>
unnoticeable.<br>
</div></blockquote><font color="#888888">
<br>
-- <br>
::: derek holzer ::: <a href="http://macumbista.net" target="_blank">http://macumbista.net</a> :::<br>
---Oblique Strategy # 18:<br>
"Balance the consistency principle with the inconsistency principle"</font></div></div><div><div></div><div><br>
<br>
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