Pd-list October 2011

pd-list@lists.iem.at

120 participants
174 discussions

Realtime kernel
by Jonathan Wilkes 02 Oct '11

02 Oct '11

Hi, On the puredata.info FAQ at http://puredata.info/docs/faq/LowerLatency.faq there is this: Under Linux, with a recent version of the stable kernel (2.4.x), special low latency patches, some hard drive tuning, and ALSA drivers, average audio latencies is 1.5 ms. If you really load your system, a maximum audio latency of 3 ms can be reached. Pathological bad cases have been known to cause 8 ms latencies this seems like the upper bound. More information on low latency under Linux can be found at Benno's site on the subject. TODO (tell the people that Pd has 3 blocks buffer, which gives you 4.5ms at least on 44.1kHz) Questions: Can I get realtime priorities using the RT PREEMPT patch just using ALSA, and not JACK? If I use JACK, does it make any difference whether or not I start Pd with the -rt flag (as long as I enable realtime in JACK, of course)? What kind of hard drive tuning? I've never read about that anywhere else. What is the "pathological bad cases" refer to? Benno's site only goes up to the 2.4 kernel. Is there a more up-to-date source that we can link to from this FAQ? More on the TODO? If 4.5ms is the smallest latency at 44.1, what sample rate is being used to get the 1.5ms average referred to in the paragraph above? Any more info on the 3 block buffer? Thanks, Jonathan

1 0

Problems with Syncing PD to external MIDI sequencer
by Loz 02 Oct '11

02 Oct '11

Hi, I'm pretty new to PD, and kind of fumbling around for the most part. I've searched the archives for the solution for this, and been unable to find it, so apologies if this has been answered before. I'm trying to sync PD to an external sequencer (my Korg Electribe-SX), and although I can receive midi notes with no problems, I can't work out how to sync the midi clock at all. I've tried midirealtimein and midiclkin, but neither of them seem to bring in any information at all. Thanks for your help, Loz

3 2

[PD-announce] BERLIN - workshop Beginning iPhone development
by pd.berlin 01 Oct '11

01 Oct '11

N.K.: WORKSHOP | Every Tuesday in Oct (4, 11, 18, 25) 2011 Beginning iPhone development Since the introduction of the iPhone in 2007, Apple's iOS has come to have a dominating presence in the smartphone market. Between them, the iPhone and iPad look set to sell 120 million units this year, and half a million apps are already on the iPhone App Store. But impressive as these statistics might be, they don't provide a reason to engage with the platform. So why learn to develop for the iPhone? The iPhone and its related family of devices (iPad and iPod Touch) are packed with sensors - a touchscreen, 2 cameras, a microphone, an accelerometer… taken together, whether used for productivity or games, they provide an experience unthinkable a few years ago. Major advances in human - computer interaction are being made right now, and it's time to get involved. Apple's multimedia frameworks provide the low-level, responsive access to the hardware that is required to create compelling apps. Unfortunately, starting to program for the iPhone can be a daunting prospect. It involves learning the Objective-C language, the Cocoa frameworks and getting used to the XCode environment. There are plenty of step-by-step guides on the internet and in print, but they can leave you none the wiser. This course is aimed at those who already have a little experience of programming, perhaps with a scripting language or a creative-coding environment such as Processing. It will introduce Objective-C and the concept of object-oriented programming, along with using Cocoa. The workshop will be given by Chris Jeffs, author of 4 apps on the store that have been released this year. More info can be found at http://chrisjeffs.com . REQUIREMENTS - IMPORTANT! You MUST have a copy of XCode 4 running on your machine. This can be found on the Mac App Store, or is available for no extra charge to registered Apple developers. If you have any questions about the content or installing xcode, email 2649(a)chrisjeffs.com You don't actually need a device, as limited testing in the iPhone simulator provided in XCode is possible. However, if you do wish to install your apps onto real hardware (running iOS 4.3+), it is recommended to sign up as a developer. This also allows limited ad-hoc distribution. Information can be found athttp://developer.apple.com/programs/ios/ . Other solutions (jailbreaking and so on) may work, but will not be covered in this course. Dates: Every Tues in Oct (4, 11, 18, 25) Times: 18:00-22:00 Fee: 25 Euros/session or 80 Euros for all sessions if paid at the beginning of the course Location: NK Elsenstr. 52 2HH 2Etage 12059 Berlin Please register by sending an email to info(a)nkprojekt.de if you don't get a response to your mail within 3-5 days please call: +49(0)17620626386. The spam filter may have removed you. www.nkprojekt.de _______________________________________________ Pd-announce mailing list Pd-announce(a)iem.at http://lists.puredata.info/listinfo/pd-announce

1 0

pix_video not working on Mac OS 10.6 ?
by rene beekman 01 Oct '11

01 Oct '11

I'm having problems getting pix_video to work with the build-in iSight camera on my MacBook. There is no video in the gemwin, just a white rectangle. When I send it a message to open the control panel, GEM hangs (it seems only GEM hangs, I get the beach ball when I hover over the GemWin, but can still move and edit the Pd patch) I've got this on 2 different machines, one 2007 black MacBook and one white 2010 machine. Both run 10.6.8 with latest updates applied. Does anyone else have this problem? Found a solution or even just a work-around? This is coming at the worst of times when tomorrow I need to start teaching a motion capture course...

2 4

Jump to page:

2024

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

2001

2000

1999

1998

Pd-list October 2011