Linux-audio-dev

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7441 discussions

[linux-audio-dev] Re: linux-audio-dev] LADSPA processing: ams, om, ... Anything else?

by Kjetil S. Matheussen

Andrew Gaydenko: > Are there alternatives for 'ams' and 'om'? My problems are: > > - 'ams' has not text fields to type-in controls values with needed > precision, sliders are not sufficient, > - 'om' engine has too many crashes (I see, it is normal, as the app is > under development). > > Anything else? PD is probably what you are looking for, http://pure-data.sf.net You can also use SND, but signal routing is text-based, http://ccrma.stanford.edu/software/snd/ http://www.notam02.no/arkiv/doc/snd-rt/html/rt-Z-H-1.html#node_toc_node_sec… gAlan might also be an alternative, http://galan.sourceforge.net/ And probably a bounch of others. :-)

18 years, 6 months

[linux-audio-dev] Amplitude modulation with LADSPA

by Andrew Gaydenko

The aim is: - to generate high frequency sine (say, 1-10KHz - carrier), - to modulate it's amplitude with low frquency signal (say, in 1-10Hz range), - to pass this modulated signal through some device, - to demodulate it, and, as a result, - to get that 1-10Hz signal. Is there sutable LADSPA plugins to construct this chain? Thanks in advance! Andrew

18 years, 6 months

[linux-audio-dev] Fiasco microkernel

by Frank Barknecht

Hallo, I just stumbled across this (via heise.de): http://os.inf.tu-dresden.de/fiasco/overview.html What are Fiasco's distinctive features (i.e., buzzwords)? Fiasco is a preemptible real-time kernel supporting hard priorities. It uses non-blocking synchronization for its kernel objects. This guarantees priority inheritance and makes sure that runnable high-priority processes never block waiting for lower-priority processes. When using L4Linux on top of Fiasco, hard-real-time applications can share one machine with time-sharing (Linux) applications. Fiasco is a real, second-generation µ-kernel protecting applications in address spaces. Thanks to its efficient task and context switching mechanism and its performace-oriented design, the performance penalties induced by address-space security are neglible - much smaller than in older, first-generation µ-kernels like Mach. Sounds somehow interesting. Ciao -- Frank Barknecht _ ______footils.org_ __goto10.org__

18 years, 6 months

[linux-audio-dev] CLI wanted - Need PCM to generic SBout on Smoothwall-2 stock kernel

by muzak24h

3 reasons I am posting here: - There are millions of DIY Linux firewalls running on light-kernels (Smoothwall alone reports > million active installs) with no generic Sound blaster support. - Most users, even Linux CLI familiar like myself, will not trade security to swap a kernel on a firewall and break the update mechanism that keeps things secure. - These millions of firewalls have CPU cycles to spare and sit around waisting power and many users would like a way to do audio out. I have posted over a year ago on the SW - UK forum and many are interested and waiting. What is needed: - PIC timer-based code (8259 chip?) to ouput wav direct to SB-out with CLI parms to set generic SB volume, filename, and loop option. Perhaps I'm asking for too much? - Maybe, even pointers in the right direction would help. In fact, if this is easy... just post it in "homebrew mods" at smoothwall.org's community forum. - I will take positive responses here, and duely credit them - This is for everyone! -- View this message in context: http://www.nabble.com/CLI-wanted---Need-PCM-to-generic-SBout-on-Smoothwall-… Sent from the linux-audio-dev forum at Nabble.com.

18 years, 6 months

[linux-audio-dev] A proposal

by james＠dis-dot-dat.net

Hello all. I've been busy and off the lists for a while and will be for a while, but I just wanted to pass on something that could be very useful/important. Please don't stop reading when you read "Microsoft", "scheme" or "money". I'm not asking for bank details :) There is a scheme for lecturers/researchers working in computer science and its various flavours in developed countries in the EU and USA to travel to developing countries for research or teaching. Microsoft will put up the travel money if the hosting institution will cover living expenses. I think they will supply up to 1,300 pounds. It works a bit like on-line dating - people that want lecturers/researchers sign up, as do lecturers and researchers. Then you see if there's a match and take it from there. So, if you're a lecturer or researcher that feels like taking you skills into developing countries for a week or two, take a look. Also, if you're from an institution in a developing country and would like to have a visiting lecturer/researcher, sign up. You might think this is totally the wrong place (actually, I cross-posted so I should say "places"), but here are my reasons: 0. I know there are a few lecturers/researchers on the list. 1. Very few people have signed up due to poor advertising. This means the money could just not get spent when it could do some real good. It also means that any potential collaborations are very likely to get funded. 2. Microsoft is probably the least favoured company on these lists BUT think of this as a way to get some of their ill-gotten gains spent doing something good. 3. It really does look like a good deal. I can't see any reason to suspect Microsoft are doing anything evil on this one. I'm going to sign myself up - why not join me. Details: http://research.microsoft.com/ero/icd/inspire/ Feel free to ignore this mail, but I'd appreciate not getting flamed ;) James -- "I'd crawl over an acre of 'Visual This++' and 'Integrated Development That' to get to gcc, Emacs, and gdb. Thank you." (By Vance Petree, Virginia Power)

18 years, 6 months

[linux-audio-dev] OSS, Line in directly to Line out?

by Tobias Scharnberg

Hello List, this might really be a dumb question, but anyway: When I have an Audio-Source on Line-In or MIC, what do I have to do to directly output it to LineOut? Is it possible to directly put it through by using /dev/mixer ? Or do I have to record the Line-In audiostream in a buffer and then read from the buffer for output? At least duplex capability is given in my device! And: I really can't use ALSA for that device, which is a shame. Any hints or suggestions are highly welcome. Tobias

18 years, 6 months

[linux-audio-dev] OSS, Sound playback too fast

by Tobias Scharnberg

Hello list, before someone tells me to use ALSA - the AC97 codec on my Arm-Board does not work wit ALSA according to the distributor... so it seems I have to stick with OSS. I opened a 16 bit 44100 wav-file with libsndfile and wrote the PCM to a buffer. Then I configure the card with 16 bit NE, 44100 and with 5 fragments of the size of 2048 bytes. According to the readback values, all data was set by OSS. In my main loop I use SNDCTL_DSP_GETOSPACE to poll the buffer. Whenever it shows free fragments, I write more data to the card. What I experience is that playback is too fast. I can make it slower by reducing the buffer-size or by setting a very high usleep value so that all fragments practically stay free. There is a precompiled madplayer on the device and it plays perfectly... can someone give me a hint what went wrong? Thanks! Tobias

18 years, 6 months

[linux-audio-dev] Call for help for LinuxTag2006

by Arnold Krille

Hi all, as every year the famous german LinuxTag is taking place. This year in Wiesbaden from 3. to 6. May. Yes, this is just one week after LAC2006, which has several advantages and disadvantages: + It is a good chance to come to Germany for LAC, have one or two days of holiday and then join the LA-Group at LinuxTag! + Maybe even repeat your LAC-Talk at LinuxTag? (see www.linuxtag.org for details on the Call-for-Papers but be aware that it ends January 15...) + Wiesbaden is more in the center of germany so perhaps some LA-folks from the north of germany can join us? - The new place for LinuxTag together with LAC being a week before enforce two of the main-booth-members of the last years (Christoph Eckert and Frank Neumann) to be only a visitor at LinuxTag or even less... That leaves a hole in the organisational part. :-( So here is my call: I am willing to do some work organizing a booth and a group of staff but I need YOUR help! If you are a german LA[DU]-member and have some spare time, join in! A booth at LinuxTag is a good opportunity to present Linux Audio to the people, not only to developers but more to users. The crowd is mostly industry (producers, technicians, musicians) at the weekdays and home-recording-users at the weekend. Don't be afraid, there won't be much questions about setting up drivers for consumer-cards (and If there are, we usually send them to their distributions booth :-) ). But there will be a lot people thinking about using your app in studio! So you definitly don't want to miss this chance! If I get positive answers from at least two other people by weekend, I will apply for a booth and things start rolling, so don't hesitate, check your calendar, plan for another week of holiday and join me (us?). So long and thanks for all the fish, Arnold -- visit http://dillenburg.dyndns.org/~arnold/ --- Wenn man mit Raubkopien Bands wie Brosis oder Britney Spears wirklich verhindern könnte, würde ich mir noch heute einen Stapel Brenner und einen Sack Rohlinge kaufen.

18 years, 6 months

[linux-audio-dev] [ANN] netjack-0.8

by torbenh＠gmx.de

netjack-0.8 is released. netjack links jackds together via a network. build your linux-audio cluster. work on a remote ardour, or even 2 ardours at once. netjack is also great for jamming with a friend. - one period roundtrip latency. - transport sync supporting slow-sync clients. see: http://netjack.sourceforge.net -- torben Hohn http://galan.sourceforge.net -- The graphical Audio language

18 years, 6 months

[linux-audio-dev] flashing a rom

by Patrick Shirkey

Hi, I'm not sure about the title of this post but maybe someone here can point me in the right direction. First a little background: A friend and I are investing some time and money into a new project over the next few months. The aim is to custom build a hardware device for DJ's using linux software. The device will be similar to a hercules PC DJ or a pioneer mixing desk except it will have onboard usb slots for flash cards. It will be an all in one DJing console which we hope will make life easier for the increasing number of DJ''s who use mp3 or digital files directly from their computers. At the moment we have an old controller which we want to run some tests with. We also would like to modify it to have usb support. However it has a proprietry OS. My question is does anyone here have experience with flashing a rom and advice that might otherwise take me a few bad experiences to learn? Thanks in advance. -- Patrick Shirkey - Boost Hardware Ltd. Http://www.boosthardware.com Http://www.djcj.org/LAU/guide/ - The Linux Audio Users guide ======================================== Apparently upon the beginning of the barrage, the donkey broke discipline and panicked, toppling the cart. At that point, the rockets disconnected from the timer, leaving them strewn around the street. Tethered to the now toppled cart, the donkey was unable to escape before the arrival of U.S. troops. United Press International Rockets on donkeys hit major Baghdad sites By P. MITCHELL PROTHERO Published 11/21/2003 11:13 AM

18 years, 6 months

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Linux-audio-dev