Linux-audio-user May 2014

linux-audio-user@lists.linuxaudio.org

75 participants
58 discussions

by Harry van Haaren

Hey Everybody, I'm happy to announce OpenAV productions: http://openavproductions.com OpenAV productions is a label under which I intend to release my linux-audio software projects. The focus of the software is on the workflow of creating live-electronic music and video. The release system for OpenAV productions is one based on donations and time, details are available on http://openavproductions.com/support Sorcer is a wavetable synth, and is ready for release. Check out the interface and demo reel on http://openavproductions.com/sorcer Greetings from the LAC, -Harry

11 years, 2 months

First LAC 2014 tune

by Louigi Verona

Hey fellas! A quickie there for you, made with LMMS and completed at LAC 2014. www.louigiverona.ru/files/desert.ogg You can get the source file: www.louigiverona.ru/files/desert.mmpz Cheers! -- Louigi Verona http://www.louigiverona.ru/

11 years, 2 months

[ANN] OpenMusic 6.8.1 - fresh build from latest sources

by anders.vinjar＠bek.no

Hi all. I'll be running now to catch the flight to Frankfurt/Karlsruhe. Just uploaded a freshly built OM (still beta) based on recent changes in the sources. Look here: http://repmus.ircam.fr/openmusic/linux The build is available as .rpm and .tar.bz2. This one changes to portmidi for midi playback. All midi-handling (files, messages, events) is shared between all 3 supported platforms, presumably making code more general and sustainable. This also means you'll need a (32-bit) version of libportmidi.so installed (but no longer need libfluidsynth.so). Im looking very much forward to come to the LAC (1st time for me). Hoping to meet many of you there! Cheers, -anders

11 years, 2 months

[New music made with Linux]: Prophetic jazz

by F. Silvain

Hey hey, Prophetic jazz is a jazz impro played purely on a hardware hybrid analogue/digital syntheszier, later on only processed by an IR reverb. I leave it to you to guess the synth. :) http://freeshell.de/~silvain/audio/prophetic_jazz.ogg or check it on the MicroLabel interface: http://www.freeshell.de/~silvain/microlabel The soundbank for the synthesizer is also available for download as a SysEx dump: http://www.freeshell.de/~silvain/p12_fs_bank.zip Ta-ta ---- Ffanci * Internet: http://freeshell.de/~silvain

11 years, 2 months

Using recording equipment in Karlsruhe

by Egor Sanin

Hi folks! For everyone here in Karlsruhe at LAC2014, good to see you all! I was wondering if someone would be kind enough to allow me to use some medium-awesome to full-awesome recording equipment for a short recording session during the next few days. I didn't bring my gear over and have a short fit of inspiration that I would like to capture. All I need is a decent audio interface and a stereo pair of mics (I would settle for a single mic, too). Please respond off-list if you can help me out. Thanks!

11 years, 2 months

Linux Audio Conference on Twitter

by Nils

I try to make some photos and twitter here and there about the linux audio conference 2014. Hashtag is #lac2014 Follow me or write your own! https://twitter.com/NilsGey Have Fun live or with the stream! Nils

11 years, 2 months

HW upgrade - new computer

by Len Ovens

I have finally upgraded my music computer. I started with an older P4 with 2.5G memory. It was working well and able to get good latency (sub ms by qjackctl at 48000) but didn't have the guts to do much with it :) it had a single core. New MB: asus z87-k CPU: intel i5 at 3.2G I could have gotten an i7, but same speed/cores plus hyperthreading. Hyperthreading is anti low latency. so the i5 gives the same performance with less power use. Memory: 8G, all one stick, which is slower than two 4G sticks... maybe not the best choice, but seems ok. Video: on board, dual monitors - VGA plus DVI both 1600x900 Disk: 2TB sata about 5 years old (as I recall) Audio interface: Delta 66 Midi interface: ensoniq pci audio card. I chose this MB because it had three pci slots as well as 4 pcie slots which allowed me to keep using my old audio interfaces while giving me possibilities for upgrades. ASUS was nice enough to list the irq layout of the pci(e) slots in the user guide. All three PCI slots are shared with something else :P However, one is shared with a single channel PCIe slot - good! That PCIe slot will not be used. That is where the delta 66 went. One is shared with three PCIe slots and "IGD" (graphics?)... skip that one. The last is shared with the SATA controller and that is where the ensoniq went. The internal audio has its own irq (of course) but that is turned off in bios (as useless). The USB setup uses 3 irqs (two for USB2 and one for USB3) and so may do well with USB audio... if I had anything other than a USB1.1 audio device to try ;) I also turned the speed "Boost" off in bios as it can not be controlled by the OS. So far things look very good. With almost no changes at all and 3.13.0-24-lowlatency #46-Ubuntu for kernel (fresh ubuntustudio 64bit 14.04 install. I can run the D66 at 16 frames with very few xruns and all are spurious. Just to be sure the ensoniq was not interfering I modified the rtirq order to: "rtc snd_ice1712 snd usb i8042" This did make some small difference. Next, I turned cpufreq from ondemand to userspace so I could play with different speeds. I set cpu0 to max (3.2G) and assumed the others would follow all being on the same chip. I was wrong and the other cores were actually at 800 Mhz (were ondemand had left them). All of my xruns vanished. Ondemand sucks. I obviously wasn't pushing this too hard (it would have been too hard on the old P4). I was running jack at 16 frames (2 periods) with the pulse to jack bridge running at the same time playing a video full screen too. Qjackctl said the DSP load was less than 10% so I will have to find some way of loading it up some more. Things to try (to load the system): - mostly MIDI stuff. - keyboard in - some HW synths I have around here - soft synths... lots of them at once. - IDJC with: - live mic - skype through pulse to idjc - some mp3 or ogg files playing (at least two at once) - maybe mumble at the same time too or more than one skype. I will monitor the cpu temperature with different user set CPU speeds. So far I am very happy with what I have seen. PCI is certainly not dead, though it is getting harder to find. I could not find any Xeon boards with PCI slots for example... even if I had wanted to pay the extra. qjackctl gets loaded at session start and is setup to start jack and a2jmidid when it runs. Pulse starts then too. Pulse is set up to have all audio interfaces turned off so that jacksink/source is always default. For all the bad things I have heard about pulseaudio... it just works. -- Len Ovens www.ovenwerks.net

11 years, 2 months

LAC'14 - Re: Information about streaming

by Robin Gareus

On 04/30/2014 08:52 PM, jpff(a)cs.bath.ac.uk wrote: > So far I have not seen anything about LAC being live-streamed as in > previous years. Will this be available before the start tomorrow? > > ==John ffitch (on holiday in southern France) > Hi John, I'm CC'ing the LAU list since this might be of general interest. Too bad you could not attend in person this year, enjoy the Provence[?]. The actual URLs are known since today and linked from http://lac.linuxaudio.org/2014/program Europe: http://lacstreamer.stackingdwarves.net/lac2014.ogg US relay: http://radio.linuxaudio.org/lac2014.ogg The A/V streams are offline for tonight but will start tomorrow 10am with Joern's Keynote. enjoy, robin

11 years, 2 months

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Linux-audio-user May 2014