Linux-audio-dev July 2003

linux-audio-dev@lists.linuxaudio.org

84 participants
89 discussions

by nick

amSynth - Analogue Modelling SYNTHesizer **************************************** http://amsynthe.sourceforge.net/amSynth amSynth 1.0-rc4 is now available!! Get the source code at http://prdownloads.sourceforge.net/amsynthe/amSynth-1.0-rc4.tar.gz?download Changes in this release include: * fixed font configuration handling problem * improved, more robust startup procedure ("auto" audio target now tries JACK audio before anything else) Enjoy! (and any problems with it please get in touch so I can fix them, details on website) -Nick d-.-b -- nixx(a)nixx.org.uk | amSynth lead developer JabberID: nixx(a)jabber.org | http://amsynthe.sf.net

21 years, 8 months

[linux-audio-dev] linuxtag 2003 resume

by Joern Nettingsmeier

hi everyone ! i'm just sitting in train up the beautiful rhine valley on my trip back from this year's linuxtag, where we had a joint booth for the alsa project and the linux audio developers. it has been great fun, and i think we made some impact :) the linuxtag page at http://www.linuxdj.com/audio/lad/eventslt2003.php3 has some more information, and will be updated with more photos and recordings as i get them. if any of the booth participants has something to add, i'll be glad to include it. thanks to frank neumann who organized our booth for the third time, and kudos to the linuxtag organizers and especially martin "joey" schulze for creating a unique and very inspiring linux event. i'd also like to thank all the LAD folks who lurked on #lad ready to answer questions from booth visitors, but due to network failures and an extremely crowded booth, this did not happen as planned. we'll be back next year. regards, jörn -- All Members shall refrain in their international relations from the threat or use of force against the territorial integrity or political independence of any state, or in any other manner inconsistent with the Purposes of the United Nations. -- Charter of the United Nations, Article 2.4 Jörn Nettingsmeier Kurfürstenstr 49, 45138 Essen, Germany http://spunk.dnsalias.org (my server) http://www.linuxdj.com/audio/lad/ (Linux Audio Developers)

21 years, 8 months

Re: [linux-audio-dev] Re: Shared memory

by Juhana Sadeharju

>From: Alfons Adriaensen <fons.adriaensen(a)alcatel.be> > >I don't have your original message with the code at hand here, so >this may be a false alarm. Did you think of making all pointers >into shared memory volatile? IIRC you are testing on a counter >that is incremented by another process - such a small memory access >could easily be optimised away. And that was it!! What braindamaged compiler authors! In the code k = -1; for (;;) { if (k != nums[1]) { k = nums[1]; fprintf(stderr,"%i\n",k); } fprintf(stderr,"g"); } The whole if was apperently optimized away. The code printed only one number and a lot of "g"s. Of the two choises (1) nums[1] is updated elsewhere, (2) it is unnecessary code, coder just tries to be clever, the compiler authors selected the latter. Here is my suggestion to C standard: replace the "volatile" with "goaheadandoptimizetheseawayiwerejustwastingmytimeincodingthese theydonotmeananythingactually". Instead of forcing legitimate coders to write volatile everywhere, those fools who write unnecessary code should be forced to add the proposed qualifier. Juhana

21 years, 8 months

[linux-audio-dev] Re: Unix documentation

by Juhana Sadeharju

>From: Robert Jonsson <robert.jonsson(a)dataductus.se> > >Speaking of documentation, it is generally a good idea to visit all the big >unix vendors for unix-programming enlightment. Well written, fresh, and very >thorough. Not everything is 100% compatible, but close enough. Also Silicon Graphics (www.sgi.com) has many good PDF books. >http://research.microsoft.com/~daniel/unix-haters.html >...for another very nice book, "Unix Haters Handbook" :-)...for some reason >it's hosted by microsoft.... (-B. No, it is not hosted by Microsoft, but we know why they hired him. Juhana

21 years, 8 months

[linux-audio-dev] Re: [ardour-dev] xruns and recording

by Anthony

* Paul Davis <paul(a)linuxaudiosystems.com> [Jul 22 03 18:44]: > >I think there was some talk about xrun handling? What is the > >behaviour of beta2? I'm seeing occasional xruns and then > > > >** CRITICAL **: file gtk-canvas.c: line 1033 (gtk_canvas_item_hide): > > assertion `item != NULL' failed. > > > >while recording. It's not clear to me if the xrun is causing the > >recording to stop or if the xrun is a side effect of some bug. > > > >I've been trying to stress test things. 12 tracks simultaneous > >recording 44.1Khz, 512*2 jack buffer. I've had the above eventually > >happen everytime. CPU usage is < 15%, I wonder if its a disk > >issue. Switching desktops just completely killed ardour while > >recording, normally this is not a problem: > > > >** CRITICAL **: file gtk-canvas.c: line 585 > >(gtk_canvas_item_set_valist): assert > >ion `GTK_CANVAS_IS_CANVAS_ITEM (item)' failed. > > in gdb, do this: > > gdb> br main > gdb> run ... > .. stops at main ... > gdb> br g_logv > gdb> cont > > then backtrace from there. its impossible to track these assertions > otherwise, but very very easy to fix once you do. thanks. > > --p Of course I can't make them happen again. In that session I was doing a lot to try and muck things up - changing zoom, recording overlapping regions...that seems to be in line with canvas problems. I can still make the recording dropout rather easily and receive and xrun, but that seems to answer my question - its seems to be a performance issue trigering something as opposed to the xrun being a result of a bug. I'll try again later. --ant

21 years, 8 months

[linux-audio-dev] i awiat your response

by fredyengeni＠hknet.com

Goodday, My name is Fred Yengeni a south African citizen, I got your Contact through the south African chamber of commece and industry . I am the brother to mr Tony Yengeni . Mr Yengeni was the chairman of parliament's in south Africa and the former chief whip of the ruling political party ANC .My Brother (MR. T. YENGENI), has as a result of trust and Confidence he has mandated that I search for a Reliable and trustworthy foreign> partner, who Will help receive some funds, which we have in cash Totalling US$25.5m (Twenty Five Million five hindred thousand United States Dollars Only) into a personal, company or any Reliable foreign bank account for safe keeping for a Short period of time, since our family bank accounts Within and outside the country have all been Frozen by the authorities. However I have managed to push the money abroad and it is presently in the custody of a financial company in Europe I got your contact through the South African chamber of commerce and industry. I hope you are trustworthy and will not sit on the money when you receive it. The total sum will be shared as follows: 20% for you , 75% For my family ,andthen the remaining 5% will be used for the reimbursement of all the expenses we will incurre in the processof this transaction like your flight ticket to Europe where you will take delivery of the funds , Your hotel accommodation , etc.There is no risk involved what so ever on this transaction, these funds will be received in your favor upon proper application. If you are interested in this business, please urgently contact me on the following e-mail address. Please endeavor to keep this business confidential.I will be most grateful if you can come forward and help me. I would refer you to these few Websites for further information. reply through my alternative email account, yengeni(a)awis.zzn.com About my family) 1) http://news.bbc.co.uk/2/hi/business/2756861.stm 2) http://www.cnn.com/2001/WORLD/europe/10/03/safrica.arms/index.html 3) http://iafrica.com/news/sa/993487.htm 4) http://www.sabcnews.co.za/south_africa/crime1justice/0,1009,55366,00.html Thanks Best regards Mr.Fred Yengeni

21 years, 8 months

[linux-audio-dev] i await your response

by fredyengeni＠hknet.com

21 years, 8 months

[linux-audio-dev] i awiat your response

by fredyengeni＠mail.com

goodday, My name is Fred Yengeni a south African citizen, I got your Contact through the south African chamber of commece and industry . I am the brother to mr Tony Yengeni . Mr Yengeni was the chairman of parliament's in south Africa and the former chief whip of the ruling political party ANC .My Brother (MR. T. YENGENI), has as a result of trust and Confidence he has mandated that I search for a Reliable and trustworthy foreign> partner, who Will help receive some funds, which we have in cash Totalling US$25.5m (Twenty Five Million five hindred thousand United States Dollars Only) into a personal, company or any Reliable foreign bank account for safe keeping for a Short period of time, since our family bank accounts Within and outside the country have all been Frozen by the authorities. However I have managed to push the money abroad and it is presently in the custody of a financial company in Europe I got your contact through the South African chamber of commerce and industry. I hope you are trustworthy and will not sit on the money when you receive it. The total sum will be shared as follows: 20% for you , 75% For my family ,andthen the remaining 5% will be used for the reimbursement of all the expenses we will incurre in the processof this transaction like your flight ticket to Europe where you will take delivery of the funds , Your hotel accommodation , etc.There is no risk involved what so ever on this transaction, these funds will be received in your favor upon proper application. If you are interested in this business, please urgently contact me on the following e-mail address. Please endeavor to keep this business confidential.I will be most grateful if you can come forward and help me. I would refer you to these few Websites for further information. reply through my alternative email account, yengeni(a)awis.zzn.com About my family) 1) http://news.bbc.co.uk/2/hi/business/2756861.stm 2) http://www.cnn.com/2001/WORLD/europe/10/03/safrica.arms/index.html 3) http://iafrica.com/news/sa/993487.htm 4) http://www.sabcnews.co.za/south_africa/crime1justice/0,1009,55366,00.html You can also reach me on this email address fredyengeni(a)mail.com Thanks Best regards Mr.Fred Yengeni

21 years, 8 months

[linux-audio-dev] i awiat your response

by fredyengeni＠mail.com

21 years, 8 months

[linux-audio-dev] Measuring latency on my Apple G3

by Ismael Valladolid Torres

Hi, I am trying latencytest-0.42-png.tar.gz for measuring latency on my Apple G3 (Debian/Sid PowerPC). Of course I am enabling USE_GENERIC_TIMER and tuning my hard disk using hdparam before tests. But, results show a very poor performance. Indeed, any X11 stressing involves a raise of the latency and lots of dropouts. I can't blame hardware. Apple hardware is top-class, and this same machine features under 1,5 ms of latency using CoreAudio on Mac OS X. So, whether the PowerPC kernel or X11 are not fully optimized, or the latencytest application is not reliable on non-Intel platforms. Any ideas? Sorry for crossposting... ;) Regards, Ismael

21 years, 8 months

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Linux-audio-dev July 2003