Linux-audio-dev July 2008

linux-audio-dev@lists.linuxaudio.org

61 participants
31 discussions

by Julien Claassen

Sorry folks! But I'mtoo stupid. I have a struct, which contains a pointer to itself as an element. How to write this. I once knew, but now I fail. It's a shame! :-( Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

16 years, 10 months

RME madiface

by D. Sen

Hello, I have been trying to use the hdspm driver with a recently purchased RME Madiface device. The functionality that I require is to play various files through various channels under program (script) control. I am happy to report that it *almost* works - in that I can use my simple userspace programs to play files. However, there are subtle problems - in that the external MADI A-to-D (an Euphonix 703) does not seem to lock into the sampling rate (something that works under windows). Its very close to achieving full functionality (for my needs) - but just that tiny bit away from being fully useable. Any ideas? Havent had much luck contacting RME and Winfried Ritsch (who wrote/maintains the code). Information on the the hardware and/or windows code would help to figure out how to modify the driver (which was originally written for the rme 9652/aes32 devices). Regards, D. Sen

16 years, 10 months

[ANN] Vamp plugin SDK v1.3 now available

by Chris Cannam

Version 1.3 of the Vamp plugin SDK is now available. http://www.vamp-plugins.org/ Vamp is a plugin API for audio analysis and feature extraction plugins written in C or C++. Its SDK features an easy-to-use set of C++ classes for plugin and host developers, a reference host implementation, example plugins, and documentation. It is supported across Linux, OS/X and Windows. Version 1.3 is a maintenance release, with several bugfixes (almost all of which only affect hosts, not plugins) and no new features. Changes since 1.2: * PluginBufferingAdapter has several important fixes to bugs that could cause incorrect timings or output descriptors to be returned * Conversion between real-time and frames has been improved to avoid rounding error in round-trip calculations * Plugin lookup no longer relies on non-portable DT_REG * The SDK now compiles with gcc 4.3 (knowing my luck it probably won't, but it's supposed to) Plugins and hosts remain binary compatible with those built using the 1.0 version of the SDK. Chris

16 years, 10 months

Rubber Band v1.2 available

by Chris Cannam

Rubber Band is an audio time-stretching and pitch-shifting library and utility designed for musical applications. http://www.breakfastquay.com/rubberband/ It includes a library that supports a sample-accurate multithreaded offline mode and a real-time lock-free streaming mode; a command-line utility program; and a LADSPA pitch-shifter plugin. Version 1.2 is faster in most situations, better sounding in many, and less potentially subject to patent claims than version 1.0.1 was. Rubber Band is Free Software under the GNU GPL. Chris

16 years, 11 months

Re: [LAD] Regarding the linux-audio lists announcing policy

by Kjetil S. Matheussen

MarcOChapeau: > > In the pd-world, we had a similar discussion to get rid of double- and > > triple-announcements some time ago, and solved it so that mails to the > > announce list get forwarded to the main list automatically. So people > > who want to announce something, only send mails to pd-announce. If you > > subscribe pd-list, you automatically also receive pd-announce, while > > if you subscribe pd-announce only, you only get pd-announce mails. > > Interesting suggestion. I guess this could work. This means that there > should be some web page somewhere stating the rules that I could use in a > template for denied emails. It would be great if you did that. > > Other ideas anyone ? How about automatically add follow-up to linux-audio-dev and/or linux-audio-user on mails posted to linux-audio-announce?

16 years, 11 months

Regarding the linux-audio lists announcing policy

by Kjetil S. Matheussen

I wonder if we could change the post-to-all-three-lists policy? I don't like to spam three mailing lists for everytime I announce a program, and it doesn't seem like everyone knows that we are supposed to post to all lists either.

16 years, 11 months

[ANN] jack_capture V0.9.19, Snd-ls V0.9.8.17 and Rollendurcmesserzeitsammler V0.0.4

by Kjetil S. Matheussen

Download from: http://old.notam02.no/arkiv/src/?M=D jack_capture ============ jack_capture is a program for recording soundfiles with jack. Its default operation is to capture whatever sound is going out to your speakers into a file. (But it can do a number of other operations as well...) Changes 0.9.17 -> 0.9.19: *Do not accept filename starting with "-" when filename is last argument. *Added the "--filename"/"-fn" option to set filename not as the last argument. Can also contain "-" as first character. *Fixed colors a bit and removed a superfluous linebreak. *Fixed segfault for missing values in commandline. *Manually clear allocated memory instead of using calloc. *Removed buffer-info line when recording to stdout. *Removed printing of "continue recording" when writing the last overruns. *Niceify the disk writing thread to -20 when more than half the buffer is used. *Continously show buffer usage, total number of overruns and whether the disk thread has high priority, in the console. Turn off by using the -hdu option. *Added option -dc to disable console update. (same as "-dm -hdu") *Fancier colors. *Removed "hepp". *Made dB meter the default and replaced the -dB option with the -lm option. *Made the console meter wider to fit the info line at the bottom. Snd-ls ====== Snd-ls is a distribution of Bill Schottstaedt's sound editor SND. (http://ccrma.stanford.edu/software/snd/) Its target is people that don't know scheme very well, and don't want to spend too much time configuring Snd. It can also serve as a quick introduction to Snd and how it can be set up. Snd-ls also serves as base code for the San-Dysth softsynth (http://www.notam02.no/~kjetism/sandysth/) and the Snd-rt music programming language (http://www.notam02.no/arkiv/doc/snd-rt) Changes 0.9.8.16 -> 0.9.8.17: *(read-enable 'positions) has been wrongfully turned off for some time. Bactrace should work again now. (This only affects people using snd-ls for programming.) Rollendurchmesserzeitsammler ============================ The Audio Rollendurchmesserzeitsammler is a conservative garbage collector providing general ways to efficiently allocate and use memory inside a realtime audio thread without having to manually free it later. Changes 0.0.1 -> 0.0.4 * Added support for iterior pointers. (Pointers which points inside middle of allocated memory). Turned out Stalin depended on this, plus that c compiler are free to store pointers in registers and stack however they want, so it's better to be safe. * Fixed header. * Made it packagable. Write make and make install to install library file and header files. * Added the function tar_get_dynamic_roots_for(char *pointer,char **start,char **end). This function requires the source for HBGC: http://www.hpl.hp.com/personal/Hans_Boehm/gc/ * Note that there are ways to increase the execution speed significantly, I just haven't had the time yet, so this update doesn't contain all the changes I wished for.

16 years, 11 months

LinuxSampler questions

by Julien Claassen

Hello! Please Christian or someone else, can you help me. I just reread the LinuxSampler features page and seems to be some way of marking points as implemented, not done or partly implemented. But I can really find those markings. Can someone give me a list of clearly marked features (clearly as in text not colours or other visually markings). In particular I'm interested in the following: 1. Does LS support gigaStudio3? 2. Articluations (.art-files) 3. Convolution reverbs And another not completely related question: Is there a telnet equivalnet that supports a bit more line-editing and probably globbing. If I say telnet I mean the program "telnet". It's just annoying when misstyping not being able to correct the typos and when entering long filenames not being able to complete them. Kindest regards Julien -------- Music was my first love and it will be my last (John Miles) ======== FIND MY WEB-PROJECT AT: ======== http://ltsb.sourceforge.net the Linux TextBased Studio guide ======= AND MY PERSONAL PAGES AT: ======= http://www.juliencoder.de

16 years, 11 months

LADSPA Vocoder plugin

by Gordon JC Pearce

For a while I've been using the sirlabs.de vocoder plugin: http://www.sirlab.de/linux/descr_vocoder.html But it has some problems, notably expecting two inputs but only offering one output. There was a patch on linuxrockstar which gave it two outputs, but something seemed a bit lacking, still. An evening of hacking and here we have it: http://www.gjcp.net/~gordonjcp/vocoder.tar.bz2 It's hard-set to eight bands, all with the same level. There's a bandspread control to alter the frequency spacing of the partials, and a width control to vary the stereo effect where odd bands go to the left output and even bands go to the right output. Give it a go and let me know how you get on. Gordon

16 years, 11 months

[ANN] jack_capture V0.9.17

by Kjetil S. Matheussen

jack_capture ============ jack_capture is a program for recording soundfiles with jack. It's default operation is to capture whatever sound is going out to your speakers into a file, but it can do a number of other operations as well. Normal URL: http://www.notam02.no/arkiv/src/?M=D Note that the above link doesn't seem to currently work because of something which seems to be www upgrade at Notam. But this link does seem to work for now: http://old.notam02.no/arkiv/src/?M=D 0.9.10 -> 0.9.17: ----------------- *Made sure the process thread won't continue sending data when jack_capture is told to quit. This led to a race conditions when recording too many channels at once (which was 256 channels on my machine). *Added the jack_capture_gui script, based on code by Svend-Erik Kjær Madsen's. *Replaced sh by bash to make it work in ubuntu. *Fixed exact port name match and gen_setformat. Thanks to Gabriel J.L. Beckers for reporting the bugs. *Increased the time the console meter is displayed in red from 50ms to 2000ms. (when the recorded jack value is equal to or higher than 1.0.) *Added the -dBr argument to specify reference level when using the console dB meter. *Added the -mr argument to specify reference level when using the meterbridge meter. *Added peak indicators to the console meter. Code to do so taken from meterbridge by Steve Harris. *Updated --help and README with the new options. *Added option "-mt" to change meterbridge type. Current valid options are vu (default), ppm, dpm, jf or sco. It's not necesarry to specify "-mb" if using "-mt". *Added option "-dB" to get a dB meter for the console meter. *Added examples how to record ogg and mp3 files using the -ws option. *Decreased default buffersize from 60 to 20 seconds. (I even had trouble provocing underruns using a minimal 0.05 seconds long buffer, so 60 seconds was obviously overkill) *Fixed message and error printing to stderr when vu meter is running.

16 years, 11 months

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Linux-audio-dev July 2008