Linux-audio-user February 2014

linux-audio-user@lists.linuxaudio.org

108 participants
83 discussions

[LAU] simple command line player for JACK

by Gianfranco Ceccolini

Hi everybody I’ve just stumbled on a very simple issue that I can’t solve. Is there a simple command line player for JACK that plays .ogg files? My first option would be the mplayer but it has got loads of dependencies and , as I’m working on a embedded device, I’d like to keep things as lean as possible. Any help or suggestion is appreciated Kind regards Gianfranco The MOD Team

12 years

Re: [LAU] raspi as midi synth

by Milan Lazecky

actually, you are right Ben. I intended to prepare RPi to use some external battery to play "on street", or somewhere more mobile, instead of taking my precious VL70m synthesizer all the time. Thank you for reminder. You say "rapid stuff gets laggy", I will try it anyway, using minimalistic raspbian and some performance tuning, but thank you for your "kind warning", will keep it in mind. Will try to use some more simple soundfonts (but probably not any "cheap" 8-bit like synthesizers..) Regards Milan 2014-02-24 20:44 GMT+01:00 Ben Bell <bjb-linux-audio-user(a)deus.net>: > On Sun, Feb 23, 2014 at 07:09:06PM +0100, Milan Lazecky wrote: > > i have a yamaha wx5 (midi saxophone). i was thinking to use my midi2usb > > cable to plug into raspberry pi which would use some fluidsynth > soundfonts > > to synthesize music realtime. > > There are some examples of people trying to do this and I think the general > impression is that the latency is touch and go depending on what you're > playing. I have one here running fluidsynth, alsa midi using an Evolution > USB keyboard, and a set of mellotron soundfonts. It's OK for chords and > single note runs, but if I try anything rapid, it feels laggy. Of course, > compared with a real mellotron that's not so bad, but playing a WX5 may be > sore. > > As others have pointed out the audio out isn't audiophile quality, but I'd > have thought if you were in a studio you'd use proper hardware and this > would be for live use? In which case, factory in an amp, an audience > talking > and so on, and I don't think it's as big an issue as people make out. > >

12 years

Re: [LAU] sound sample resources

by Fero Kiraly

really great sources. thank you. -- Fero Kiraly www.ferokiraly.com

12 years

[LAU] lm3jo en deb version 1.1.1-4

by temps

announcement I posted this weekend, lm3jo.deb . For download here: http://www.letime.net/vocale/paquet_deb/lm3jo.deb reminder lm3jo : Project synthesizer sounds lm3jo -- View this message in context: http://linux-audio.4202.n7.nabble.com/lm3jo-en-deb-version-1-1-1-4-tp89556.… Sent from the linux-audio-user mailing list archive at Nabble.com.

12 years

[LAU] sound sample resources

by LM

I posted some links related to sound samples to the FreePats mailing list and Carlos suggested I share them here as well. Was recently researching a multimedia topic and happened to run across some sound sample related web sites. Thought I'd share what I found in case others might be interested. I found a cross-platform soundfont editor for the sf2 format. Looks like it's built using Qt. http://sourceforge.net/projects/polyphone/ Thousands of free sound samples specially recorded by Philharmonia Orchestra players licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License: http://www.philharmonia.co.uk/explore/make_music/ The LinuxSampler project was founded in 2002 with the goal of producing a free, streaming capable open source pure software audio sampler with high stability: http://www.linuxsampler.org/about.html This project aims to create a full orchestral sample library in the .gig format for use with the linuxsampler: http://sourceforge.net/projects/openorchestra/ List of sample libraries: http://bb.linuxsampler.org/viewtopic.php?f=8&t=11 musescore soundfonts http://musescore.org/en/handbook/soundfont http://www.linuxmusicians.com/ linuxmusician samples: http://www.linuxmusicians.com/viewforum.php?f=50&sid=bd65ce094deb26d5c09255… Recommended Sound Libraries and Where to Get Them... http://www.remastersys.com/forums/index.php?topic=1740.0 http://www.bandshed.net/sounds/sfz/ Web site to share Free music: http://freemusicpush.blogspot.com/ Best wishes. Laura http://www.distasis.com/recipes/music.htm

12 years

[LAU] Common Music - Importing audio files, and pointers to learning material?

by Angel de Vicente

Hi, I'm completely new to Common Music (http://sourceforge.net/projects/commonmusic/), so I'm hoping somebody can give me a hand here. Before I go to the effort of starting to learn it, I wanted to know if it is possible to somehow import audio files with it and treat them as objects (say for example that I have a number of noise sounds and that I want to generate some music by randomly playing them for a length of time)? A quick look at the Common Music webpage and some of the examples there didn't clear this up for me. At the same time, what would be the best way to start learning how to use it? From what I read, the book http://www.amazon.com/Notes-Metalevel-Introduction-Computer-Composition/dp/… is a very good starting point, but apparently all the examples, etc. are for an old version of Common Music (CM2), so I'm not sure if whatever one can learn from that book will be of much use with the current version of CM3. Any pointers welcome. Thanks a lot, -- Ángel de Vicente http://www.iac.es/galeria/angelv/ --------------------------------------------------------------------------------------------- ADVERTENCIA: Sobre la privacidad y cumplimiento de la Ley de Protecci�n de Datos, acceda a http://www.iac.es/disclaimer.php WARNING: For more information on privacy and fulfilment of the Law concerning the Protection of Data, consult http://www.iac.es/disclaimer.php?lang=en

12 years

[LAU] ps3 controller with bloetooth

by Atte

Hi I have "some success" with getting input from a ps3 controller over usb: This shows up in lsusb: atte@skagen:~$ lsusb | grep Sony Bus 003 Device 013: ID 054c:0268 Sony Corp. Batoh Device / PlayStation 3 Controller "cat /dev/input/js0" (as regular user) show the expected garbage when moving the controller around or touching buttons. I also get input in chuck opened with Hid.openJoystick(0), so I'm pretty sure the controller is recognized and sending stuff into the system. Now, how do I get it running over bluetooth (wireless). Google led me to lot's of outdated info, so I'm hoping someone here with hands-on experience on a recent system could provide a few starting points, hints, links or clues. Thanks in advance! -- Atte http://atte.dk http://modlys.dk

12 years

[LAU] [OT] Free Course online about the Higgs Boson

by Grekim Jennings

Hi dear all. Just wanted to let you know about this amazing course that the University of Edimburg has online during 7 weeks, and there's still days to sign in: https://www.futurelearn.com/courses/higgs As maybe you've notice, I'm quite eclectic and curious about anything, and Science (Physics in this case) is one of my favourite matters, so I'm in the course. It's now in the thick of the 2nd week and I tell you that it is amazing the quality and also the simplicity they've achieved given the complexity of the subjects, with a lot of instructional videos and some articles and texts, and even Mr. Higgs is there himself. Kindest Regards. -- Carlos sanchiavedraz * Musix GNU+Linux http://www.musix.es Thank you! This looks fascinating! Grekim

12 years

[LAU] Low latency audio interface for the Beagle Bone Black?

by Rafael Vega

Hi, has anyone tried a usb sound card with the BBB? I want to connect my guitar to it and run some PD patches so something with low latency would be niiice :) Also wondering how hard it would be to directly connect some ADCs and DACs. Has anyone tried? -- Rafael Vega email.rafa(a)gmail.com

12 years

Re: [LAU] [LAD] JACK latency API clarifications

by Lieven Moors

On Fri, Feb 21, 2014 at 08:34:16PM +0100, Jörn Nettingsmeier wrote: > On 02/21/2014 07:52 PM, Lieven Moors wrote: > >>it was part of the API very early on, then we decided we didn't want to > >>impose the possibility of change on clients. as time goes on, it becomes > >>clear (to me at least) that we should have implemented it. > > > >What would be use cases for changing the sample rate dynamically? > > > having wired up a complex signal graph, which for the most part depends on > the studio, not on the project at hand, and then having to deal with > different projects in different sample rates. > > say your studio involves three monitoring setups, one main stereo, one > nearfield, and one surround, you are using jack to do EQ on those things, in > my case there's an ambisonic decoder in the loop as well. that means the > jack graph is already quite elaborated. in that case, it would be nice to > leave it running while switching from, say, a cd project at 44k1 to a tv > thing at 48k. > > as it is now, i have decided to do _everything_ at 48k (i have no second > thoughts about a final resampling step), but if a client brings material at, > say, 96k, i have to downsample first. sometimes i wish for an easy way to > reclock a graph. obviously, nobody expects this to be gapless. fading > everthing down and then taking a few seconds to reclock everything would be > fine. > > but then, many pieces of software in my chain would need changes. for > instance, an important piece of dsp for me is jconvolver, as it sits in > front of all my speakers. > of course, the impulse responses i use for EQ and room correction only make > sense for a given sample rate - it would have to be changed to swap one set > of IRs for another during a reclocking call, and of course that needs to be > configured and the user actually needs to provide those different IRs. > Yes, I see... I got into the habbit of using the same sample rate for all my projects as well. And I can remember a few times I wished to change the sample rate on the fly. Now I wonder if this would be difficult to implement. Do many clients expect the sample rate to remain stable? Aren't most clients checking for the sample rate in the process callback anyway? Of course, clients depending on samples or IR's would have to play back at the wrong rate... lieven

12 years

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Linux-audio-user February 2014