Linux-audio-user September 2008

linux-audio-user@lists.linuxaudio.org

124 participants
125 discussions

by simone-www.io-lab.org

hi anybody knows if Texas Instrument OHCI-Lynx is beter or not of Texas Instruments TI XIO2200 for a PCMCIA firewire card? thanks Simone -- .wmv , .wma , .pps along with all proprietary Windows formats won t be accepted and/or viewed....

16 years, 12 months

[fwd] Re: ALSA ate my MIDI! (Or Something) - RESOLVED

by maex＠firstfloor.org

> > Also, some USB hubs may not provide the full spec of power to every port > on the hub if you happen to be using all of them. I'm using 5 of the 6 > available ports on my little powered Zonet USB2 hub (with transfer rate > to prove it!) but if I add my 2.5" external notebook hard drive to the > last available port, the drive doesn't get enough juice to power up and > make a connection. Directly connected to the computer, it works fine. > > If it's really a USB1 hub, it may not be providing enough power for > everything connected to the hub when you plugged your keyboard into? hello i had quite similar experiences with usb hubs and usb soundcards and also midi interfaces the usb sounddevice for instance, wanst working over a unpowered usb hub, and of course doing his job when connected directly. and some interfaces may not work correctly like described above. for instance the usb midisport 2x2. i coulnd get it working to provide midi signal out into old analog syntesizers ( i guess they are more sensitive or have more powerconsumption, i dont know, on the midi site ). i had to route it through powered midi i/o ports to get it working. so i gave that interface away. i dont know if this has anything todo with alsa, i dont think so. best m > > -- > David > gnome(a)hawaii.rr.com > authenticity, honesty, community > _______________________________________________ > Linux-audio-user mailing list > Linux-audio-user(a)lists.linuxaudio.org > http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user > ----- End forwarded message -----

16 years, 12 months

ALSA ate my MIDI! (Or Something)

by Matthew Smith

Hi Folks Just when I thought that everything was going well, I have hit a problem. I have disabled the hd-intel sound card on my laptop to get rid of Jack xruns - which it did. Since doing that, I have had some issues with the Alsa configuration; although I thought everything was supposed to hotplug, it appeared that Alsa was still looking for the hd-intel card. This may just be a Gentoo quirk. Alsaconf doesn't work with USB devices, which makes it pretty useless, so I had to wade through some configuration files and change lines so that that the modprobe aliases for card0 went to snd-usb-audio. With a bit more fiddling and a couple of reboots, I got audio working again with my external Behringer sound card. So far, so good. Now, for some strange reason, MIDI seems to be broken. When I plug in my Roland PC-300 MIDI controller and hook it up with Jack to a softsynth or to Rosegarden, nothing happens. I flipped the switch on the back that sets the output to go to the 'real' MIDI port rather than through the USB system, hooked it into a 'real' synth module and it worked fine. This is what my ALSA setup looks like: Advanced Linux Sound Architecture Driver Version 1.0.15 (Tue Nov 20 19:16:42 2007 UTC). /proc/asound/devices: 0: [ 0] : control 1: : sequencer 16: [ 0- 0]: digital audio playback 24: [ 0- 0]: digital audio capture 32: [ 1] : control 33: : timer 40: [ 1- 0]: raw midi /proc/asound/cards: 0 [default ]: USB-Audio - USB Audio CODEC Burr-Brown from TI USB Audio CODEC at usb-0000:00:1d.0-2, full s 1 [PC300 ]: USB-Audio - PC-300 Roland PC-300 at usb-0000:00:1d.7-3.4, full speed I dont' think that the PC-300 is broken because a) it is recognised and b) works OK when directed to its MIDI port. Although all the Jack connections LOOK correct, no MIDI data gets from the keyboard to wherever I'm sending it. (That includes doing a loopback through Jack so that the PC-300 inbound is connected to its hardware MIDI out.) My suspicion is that ALSA is to blame but how and why, I have no idea. I notice another ALSA quirk - if I fire up alsamixer, it only shows the playback channel of my USB sound device, not the capture channel. Running this with the hd-intel card, I see all channels. Ideas, anyone? Cheers M -- Matthew Smith Smiffytech - Technology Consulting & Web Application Development Business: http://www.smiffytech.com/ Personal: http://www.smiffysplace.com/ LinkedIn: http://www.linkedin.com/in/smiffy

16 years, 12 months

Freebob high CPU usage

by Hector Centeno

Hello, I have two computers (desktop and laptop) with Ubuntu Hardy (using kernel RT on both) and a Edirol FA-101 firewire interface. I was comparing Jack's CPU usage (no other audio app running) using the Edirol against a USB M-Audio Transit. I noticed on both computer the CPU usage to be much higher with the firewire interface than with the USB. On my laptop goes up to 15% or more and 8% on my desktop (Centrino Duo @ 1.7GHz and Core 2 Duo @ 2.1 GHz respectively) while using the USB interface the usage remains below 1%. Is this a normal behaviour of firewire interfaces? Is this a Jack related issue? Is there a recent and more efficient version of Freebob (ffado maybe?) than the one from the Ubuntu repos? Cheers, Hector

16 years, 12 months

2.6.24 or 2.6.26

by Cassiel

Hi you all, I am currently having trouble with 2.6.26 release and RT patch, the kernel compiles and the machine boots but ardour crashes randomly (2.4.1 release) and system perfomances they doesn't seem as they should (to me at least). I am currently on AMD64 dual core with ATA hd, running debian lenny with 3GB ram and I would expect no xruns with: - 16 tracks mix, - /usr/bin/jackd -R -P70 -dalsa -r48000 -p256 -n2 -D -Chw:0 -Phw:0 -Xraw - 10.7ms latency Using playback mode I can achieve 5.3ms So I would like to read some feedback from LAU about the best (generally speaking) kernel release to use for RT tasks. regards raffaele Apologize if this point has been addressed in previous thread(s) but didn't find any archive search engine.

16 years, 12 months

Re: [LAU] Finally build 2.6.26 that works

by Norval Watson

"Nvidia .... always a problem, it seems. Neither nvidia's nor debian's legacy driver (for mx400 cards) will compile. Debian's (where I had the sources and could play a bit) complains about an implicit definition of __SEMAPHORE_INITIALIZER. This is inside a #define that stuffs a mutex structure. I tried breaking this into a function and a #define but the constant is the problem, not how it was being used. Any ideas?" Fortunately, it's not too difficult to work around. Code: apt-get update;apt-get install nvidia-kernel-source sed -i '/__SEMAPHORE_INITIALIZER/ s/__SEMAPHORE_INITIALIZER/__COMPAT_SEMAPHORE_INITIALIZER/' /usr/src/modules/nvidia-kernel/nv-linux.h sed -i '/struct semaphore/ s/struct semaphore/struct compat_semaphore/' /usr/src/modules/nvidia-kernel/nv-linux.h See this page, down the bottom.. http://forums.debian.net/viewtopic.php?t=17035&postdays=0&postorder=asc&sta… Hope this helps Norv Make the switch to the world's best email. Get Yahoo!7 Mail! http://au.yahoo.com/y7mail

16 years, 12 months

E-Mu ESI4000 SMDI

by Dan Richert

I posted about this a couple years ago on LAD or LAU, but I thought a fresh thread might attract some new insight. I'd like to get SMDI transfers to/from an E-Mu ESI4000 working under Linux. I've tried SMDITools ( http://nolv.free.fr/SMDITools/ ), but that doesn't seem to work quite right with the ESI4000. It's been a little while since my most recent go at it so I don't remember the exact problems I was running into. Has anyone had any luck getting SMDI transfers to work with the ESI4000 under Linux?

16 years, 12 months

Linux audio course Rotterdam

by katelyn

LINUX AUDIO COURSE ROTTERDAM (THE NETHERLANDS) Working with Linux? With the most important OpenSource audio projects for midi sequencers, softsynths, effect plugins and samplers? WORM offers a Linux audio course, developed by Lieven Moors, to pass on necessary and sufficient knowledge for working with Linux audio software to fellow musicians. Goal of the course We will start with an introduction into Linux; installing and starting programs and daemons, giving commands and editing configuration files. A same introduction goes for Alsa (Advanced Linux Sound Architecture) and Jack (Jack Audio Connection Kit). After this audio software like Ardour, Audacity and Sox will get a close hands-on introduction. After that the course will continue with Linux plugins (a.o. LADSPA, DSSI, VST) and midi/sequencers (a.o. Rosegarden, Seq24, Muse, Hydrogen). Besides that there will be a full overview of the most important softsynths and samplers for the Linux operating system (a.o. ZynAddSubFX, Fluidsynth, Linuxsampler). Other programs like Freqtweak (digital signal processor), Festival (speech synthesis), Jamin (mastering), LASH (audio session handler) and Freecycle (looping software) will also pass review. An expanded overview of the most important audio software for Linux will be given to the course members as well as an introduction of to how to use these programs. Lieven Moors Lieven Moors lives in Brussels and used to be the guitarist and composer in Belgium outfit Das Pop. Nowadays he performs as a solo musician and traded his guitar for a computer running the GNU/ Linux operating system and numerous audio and midi programs. He personally mastered a lot of difficulties that he ran into using Linux audio software and wants to share and pass on his adapted skills, knowledge and experience over the last years. Start: October 7, 2008 (with enough reservations – submit your application before september 29) Duur: 12 lessons of 3 hours Wanneer: tuesday from 19.30 till 22.30 Waar: Worm in Rotterdam (www.wormweb.nl) Prijs: 350 euros (including study material) To apply or for more info: Katelyn(a)wormweb.nl or for more info: lievenmoors(a)gmail.com The course will be given in English

16 years, 12 months

Yamaha Disklavier Pro grand piano (132MiB, new improved version)

by Roberto Gordo Saez

This is the new release of the Yamaha Disklavier Pro acoustic grand piano soundfont. It is much improved, including a total of 5 velocity layers. 132MiB (yes, it's getting big) 116 samples, 44100Hz, 16bit Creative Commons Attribution 3.0 license It has a new stereo panning effect. It's not real stereo, but it helps to make it more realistic when playing live, as somewhat imitates the pianist's perception of the piano. Loops are not required anymore. I've selected and included only full length samples (around 20 seconds of sound for each sample, for low notes). Listen to this example music rendered trough it, a piano arrangement of the famous Pachelbel's Canon in D: http://zenvoid.org/audio/pachelbel-canon_20080910.ogg I've added this time a very slight reverb to the demo, through jack-rack and ladspa plugins. A convolution reverb added with jconv was more realistic, but the license of the impulse responses was bugging me. Download the soundfont here: http://zenvoid.org/i/audio.html A note about the dynamics: I've placed the velocity layers at almost random points. They work OK with my MIDI keyboard, but please tell me how well does it perform in your MIDI keyboard (and what keyboard model you are using). You should be able to reach the last layer at forte (strong) levels, the first layer at piano or mezzo-piano (soft) levels, and around the layer 2 or 3 under normal pressure.

16 years, 12 months

Re: [LAU] Free samples

by Hartmut Noack

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Roberto Gordo Saez schrieb: > On Tue, Sep 16, 2008 at 01:28:49PM +0200, Hartmut Noack wrote: > > This is excellent! Guitars and percussion are among the most needed > samples right now (at least for me). For percussion, there is a good > set of samples and an Hydrogen sound bank made by Marcos Guglielmetti, > but it would be good to have more alternatives. http://gnupc.de/~zettberlin/law/samples/free/raw/ Many cymbals, 2 snares, 1 bassdrum etc. I hope, some of these will be helpfull. > For guitars there is > nothing under free licenses (at least that I know of). I would be very > happy to turn your samples into soundfonts :-) These I made some time ago from a Fender Telecaster: http://gnupc.de/~zettberlin/law/samples/free/telshow-tele/ the samples are 44.1/16 only and made up to fit my personal needs. That is: I use them in Specimen to build new virtual instruments, not to mimic a real guitar (I prefer to play those myself oldschool ;-) ). Right now I am about to record riffings and other sounds from the metal domain. Hope I can upload some of those next week. >> Repeat: I need feedback *includig* advice on what I should do better. > > What equipment and mics do you have? http://lapoc.de/lapoc-gear.php the page is in german only (sorry for that...) so here an excerpt: Mikrofones: * RFT DM 122 (dynamic spheroid, for acoustic guitars and drums) * AKG Perception 100 (condenser cardioid for voice, strings, piano, percussion etc) * Samson C02 (electret for cynbals and drums) I have a small collection of lesser mics also but use those quite seldom. I also use to borrow mikes from friends and colleagues as needed especially if I run sessions with drummers/complete bands. Preamps: * a phonic mixer MM1002 (better than its price suggests ;-) * a Presonus Firebox (very very OK I dare to say) Of course the Computers are all GNU/Linux and Ardour, the interfaces are the Firebox and a MAudio 1024 Audiophile. > Well... my suggestion and wishes are samples at the higher sample rate > and bit depth that your hardware allows, and very long in time (if > possible, the full note decay). It is always easier to downsample and > cut big samples than the opposite. The uploaded file is 96KHz/32float OK? To make a drummer play a cymbal and actually *wait* and be quiet till the decay ends is a different matter though ;-) But most of the samples should be separate. Some of them have strange resonances in it for we have recorded in a room with 10 treated pianos. And there may be a minimum of hiss for we needed to use a very long cable. Hope I can make some more next week without such (maybe) unwanted extras.At the other hand these extras add some tasty life to the samples... > Don't bother in cutting the samples, just record into a big wav file > with all the samples one after another, separated by one or two > seconds of silence. That helps a lot: if I only need to record one big file and only cut unneeded silence/noise when changing instruments/microphones/settings, the recordings will keep coming ;-) > To get an idea of the result, could you please create a few demo > samples of a clean electric guitar, for example? OK, I got these: http://gnupc.de/~zettberlin/law/samples/free/telshow-tele/ I will record some more in the next two weeks... best regs HZN -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFI04kw1Aecwva1SWMRAoGtAKCLv2uni9iCESpUwhJzoNtsX9Y3jwCeIWl2 /e/oqtVH3TTaD4yhGVU0Uuw= =6032 -----END PGP SIGNATURE-----

16 years, 12 months

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Linux-audio-user September 2008