Linux-audio-user December 2015

linux-audio-user@lists.linuxaudio.org

75 participants
78 discussions

which lau distro is more commandline friendly?

by Karen Lewellen

Hi all, At the same time I am posting here, I am posting on the talk list of a LUG here in the greater Toronto Area. Two situations that members have asked about, referenced are bringing up a couple of questions for me. of the popular Linux distributions specifically developed for the professional audio community, which is more likely to allow for command line access? I understand these tend to have programs that more general distributions do not include, but I already now I want access to some things shared here, like Peter's and Joel's programs. So can anyone speak to the choices? My second question is tied to latency. I believe this issue came up when I first asked about outfitting a computer for Linux audio work. One person here tells me that there here are low latency kernel tools that address the problem. the question is going to be if those tools work with older distributions, squeeze for example, because more up to date Kernels do not always support hardware synthesizers. I would not have made my audio desires dependent on adaptive technology, buts someone flat out posted a question regarding this for me on list, not privately....as if they are thinking all individuals with even slightly the same label are the same, must have inter changable needs, and asking one means such issues impact all. so, I have a choice. build Linux audio setup with zero chance to use the box directly, seems most likely right now, and does not bother me very much since the screen readers are rather dreadful, or build a setup with a slight door open on that use the machine directly front. I already know ssh telnet is going to be my only option right now for blending speech with using the Linux box in any reasonable to my standards way. I did want to leave a chance for non-software speech however. Thoughts on my first question? Kare

8 years, 3 months

Second solstice EP from metal band Seed of Heresy

by Bent Bisballe Nyeng

Hi list Again as last year we did a solstice EP release made almost entirely with linux. So without further ado I would like to share the latest EP from my band Seed of Heresy recorded and mixed using Ardour on linux with the exception of vocals and guitar tracking, which was done in another studio using proprietary non-linux tools. The EP is as last year released under Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC-BY-NC-SA) license and is available in several formats on the website: http://www.seedofheresy.com The release was done on December 22nd 05:49 CET, 2015, which is the exact time of winter solstice. Again the drums were performed by myself. Enjoy! Kind regards Bent Bisballe Nyeng

8 years, 3 months

Nice looking interface from Arturia.

by John Murphy

I like Arturia stuff, so I might have to get one of these later in the year: http://www.arturia.com/audiofuse/overview "AudioFuse connects with virtually everything: mics, instruments, turntables, studio equipment, Mac, PC, Linux, tablets, even iOS and Android phones. It all happens with a round-trip latency as low as 3 milliseconds so you'll feel right in the groove every time." I need in the groove feeling lol. http://www.soundonsound.com/news?NewsID=18093 -- Please accept without obligation, explicit or implicit, our best wishes for an environmentally conscious, socially responsible, politically correct, low stress, non-addictive, gender neutral, celebration of the winter solstice holiday, practiced within the most enjoyable traditions of the religious persuasion or secular practice of your choice, with respect for the religious/ secular persuasions and/or traditions of others, or their choice not to practice religious or secular traditions. Please also accept, under aforesaid waiver of obligation on your part, our best wishes for a financially successful, personally fulfilling and medically uncomplicated recognition of the onset of this calendar year of the Common Era, but with due respect for the calendars of all cultures or sects, and for the race, creed, colour, age, physical ability, religious faith, choice of computer platform or dietary preference of the wishee. By accepting this greeting you acknowledge that: This greeting is subject to further clarification or withdrawal at the wishor's discretion. This greeting is freely transferable provided that no alteration shall be made to the original greeting and that the proprietary rights of the wishor are acknowledged. This greeting implies no warranty on the part of the wishors to fulfill these wishes, nor any ability of the wishors to do so, merely a beneficent hope on the part of the wishors that they in fact occur. This greeting may not be enforceable in certain jurisdictions and/or the restrictions herein may not be binding upon certain wishees in certain jurisdictions and is revocable at the sole discretion of the wishors. This greeting is warranted to perform as reasonably may be expected within the usual application of good tidings, for a period of one year or until the issuance of a subsequent holiday greeting, whichever comes first. The wishor warrants this greeting only for the limited replacement of this wish or issuance of a new wish at the sole discretion of the wishor. Any references in this greeting to "the Lord", "Father Christmas", "Our Saviour", or any other festive figures, whether actual or fictitious, dead or alive, shall not imply any endorsement by or from them in respect of this greeting, and all proprietary rights in any referenced third party names and images are hereby acknowledged.

8 years, 3 months

mcpdisp 0.0.6 released

by Len Ovens

Another new release of mcpdisp, a Mackie Control display emulator. This is meanto to sit on the screen below a DAW or other program that has a hardware Surface to control it such as the BCF2000 which has no scribble strips, meters or timecode display to add that functionality. 0.0.6 brings: - Added -x and -y command line arguments for window placement. - Added a Thru port so only one input needs to connected to daw. This helps on DAWs that use a dropdown that only allows connecting to one MIDI port. - Changed port names to match client name for applications that only show the port name to save space. - Accept sysex version of time as well (not tested). I don't have a DAW that sends the time as a sysex string, but it is in the standard. - Fixed a bug where some midi events may be skipped or mutilated. I didn't actually see this happen, but it could in theory. The home page is: http://www.ovenwerks.net/software/mcpdisp.html Download on there is just a link to: https://github.com/ovenwerks/mcpdisp Comments and bugs welcome. Enjoy. -- Len Ovens www.ovenwerks.net

8 years, 3 months

pianos with built in recorders?

by Karen Lewellen

sorry goofed this the first time. Hi folks, > there is a Yamaha model of which I am thinking, but know it is not the only > one. > Thoughts about the efficiency of using such in Linux? > since many connect via USB for example, does it make transfer of files > easier? > Any disadvantages? > thanks, > Karen > > >

8 years, 3 months

CPUs for low latency

by Len Ovens

Just looking through some of the results on: https://www.osadl.org/Hardware-overview.qa-farm-hardware.0.html Some of the higher speed many core CPUs have the worst latency: https://www.osadl.org/Latency-plot-of-system-in-rack-1-slot.qa-latencyplot-… https://www.osadl.org/Latency-plot-of-system-in-rack-0-slot.qa-latencyplot-… (These will cause xruns at 16/2 at 48000 sample/sec) Some slow cpus do much better: https://www.osadl.org/Latency-plot-of-system-in-rack-3-slot.qa-latencyplot-… https://www.osadl.org/Latency-plot-of-system-in-rack-1-slot.qa-latencyplot-… Two very similar CPUs can vary: https://www.osadl.org/Latency-plot-of-system-in-rack-c-slot.qa-latencyplot-… https://www.osadl.org/Latency-plot-of-system-in-rack-0-slot.qa-latencyplot-… (the second is a faster but older one) Hyperthreading does not effect latency?: https://www.osadl.org/Latency-plot-of-system-in-rack-0-slot.qa-latencyplot-… (at least this plot seems to say that) The state of HT and what effects how much it hits latency has changed. In order for HT to be worth while, any one thread needs to keep the core for a certain number of instructions. As the CPU speed goes up the same number of instructions gets done faster. I also think that the overhead for context switching has gone down. With my old P4 (single core) HT restricted my AI to 64/2 with the ocasional xrun, HT off would allow solid 16/2 performance. My new i5 does not have HT, so I am not able to compare. AMD seems to have something similar enough to hyperthreading to be wary of. A number of the AMD CPUs shows twice as many threads as cores. I know that they do double caching, I don't know if this is what the Linux kernel is seeing as shadow cpus or not. Looking through some of the AMD documentation (which is very sparse BTW) It appears to say that some of the boost and processor speed changes are not controllable by bios. On any of the Intel CPUs, both boost and HT can be turned off by any reasonable bios. With AMD I am sure that the kernel at least can be told to ignore shadow CPUs. I would like to know more about speed scaling and how much influence the the OS has on it. Another thing with CPUs that seems to becoming common is powering off parts of the CPU that are idle. The poweron time is very short, but context change time would still be there. There have been some experiments that show just keeping the cpu busy with a do-nothing-script can give lower latency times. Anyway, the latest, greatest MB and CPU is not the best bet for low latency audio. Advertised "performance" is based on throughput. Any of the benchmarks I have seen on the manufacture's sites are about throughput. Latency is not mentioned or measured. The few times it has been mentioned has been in regard to video where it is called "low latency" which probably in the audio world is noticable delay. (in most computer engineer's minds low latency is 30ms) The idea of what latency is good enough for audio work has changed with the change from mostly PCI cards to USB. Where 64/2 was the normal maximum, 128/2 or even 256/2 have become common... and seem to be accepted as "OK". (there are also USB cards that will run at 32/2 or better) Maybe there are other reasons for the change in thought on this too. Note: this was a very lite look, not in depth at all. The profiles do not match the tests always. I see that in the profiles the governor is set to OnDemand, but the test plots all say "lowest P state: performance". -- Len Ovens www.ovenwerks.net

8 years, 3 months

now online: video recording of Louigi Verona at Open Source Audio Meeting Cologne in November 2015

by Louigi Verona

Hey everyone! Last week Nils posted to the list, but apparently it has been filtered out, although I do see it in list archives. We decided to re-post it to the mailing list for those of you (or perhaps even all of you) who missed it. Dear Linux Audio User list, here is a video recording, split in three parts, of Louigi Verona giving an invited talk at the Open Source Audio Meeting Cologne in November 2015 (which is organized by me, that's why I'm posting this). On Electronic Music (Part 1/3) https://www.youtube.com/watch?v=dKw6AupjUMM Unsorted Demonstrations (Part 2/3) https://www.youtube.com/watch?v=63EI-oxsSgQ On Hobbyist Software (Part 3/3) https://www.youtube.com/watch?v=JlaBuFfkQdM I hope you enjoy this and I would be happy to see some thumbs ups and nice comments here or in the youtube section. Best wishes, Nils

8 years, 3 months

now online: video recording of Louigi Verona @ Open Source Audio Meeting Cologne in November 2015

by Nils Gey

Dear Linux Audio User list, here is a video recording, split in three parts, of Louigi Verona giving an invited talk at the Open Source Audio Meeting Cologne in November 2015 (which is organized by me, that's why I'm posting this). On Electronic Music (Part 1/3) https://www.youtube.com/watch?v=dKw6AupjUMM Unsorted Demonstrations (Part 2/3) https://www.youtube.com/watch?v=63EI-oxsSgQ On Hobbyist Software (Part 3/3) https://www.youtube.com/watch?v=JlaBuFfkQdM I hope you enjoy this and I would be happy to see some thumbs ups and nice comments here or in the youtube section. Best wishes, Nils

8 years, 3 months

Re: [LAU] which lau distro is more commandline friendly?

by David Jones

I use Debian (stable and Sid) and Debian derivative (Ubuntu), even ran a Sid+Experimental setup for a while. It worked, but I embrace my weird. ;) David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.comOn Dec 22, 2015 16:11, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> wrote: > > On Wed, 23 Dec 2015 03:06:17 +0100, Ralf Mardorf wrote: > >I stay away from Debian and especially from Debian derivatives. > > Resp. the Debian derivative I use are Ubuntu flavours only and I don't > use Ubuntu derivatives > -- > http://www.grundgesetz-gratis.de/ > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user(a)lists.linuxaudio.org > http://lists.linuxaudio.org/listinfo/linux-audio-user

8 years, 3 months

Superbooth synthesizer fair Berlin

by Christopher Arndt

Just stumbled upon an articele on the German web magazine AMAZONA about a new synthesizer fair scheduled to take place in Berlin at the end of March next year: https://www.superbooth.com/en/landing.html Article (German): https://www.amazona.de/top-news-superbooth-16/ I'm not sure if there will be any room for Open Source audio projects or the DIY scene, but I thought I'd just pass this on, maybe it is of interest to to some linux-based audio companies and projects, e.g. the MOD etc. Chris

8 years, 3 months

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Linux-audio-user December 2015