Linux-audio-user June 2010

linux-audio-user@lists.linuxaudio.org

143 participants
146 discussions

Re: [LAU] Can't get working Snd's LADSPA under Ubuntu

by Kjetil S. Matheussen

Mike Cookson: > > Hello all. I have compiled latest stable snd, version 11.6. I looked for > LADSPA support and found it at core, but ladspa-related scheme files > (extensions) are missing. I extracted them from Debian package since > could not find initial place, where they appeared. When I am loading > ladspa.scm throught listener, I have message: > ;use-modules: unbound variable, ladspa.scm[56] > > Approriate string is (use-modules (ice-9 threads)). > I wrote (load "full_path_to_ice-9/threads.scm") and then got other message: > ;define-module: unbound variable, /usr/share/guile/1.6/ice-9/threads.scm[64] > > LADSPA menu is not appeared neither at menu bar, nor plugins menu. > Lots of stuff was recently removed from snd, so the ladspa menu probably doesn't work anymore. However, snd-ls still supports ladspa and all the realtime stuff, and it is going to do so in the future too. However(2), you are using Guile 1.6, which is really really really old, so snd-ls probably won't work either unfortunately. :-(

13 years, 10 months

turning a consumer soundcard into "prosumer" w/ quasi-balanced outs

by Niels Mayer

even though I found a workaround and won't need this approach, I just wanted to share something I found out, for "hot rodding outputs" of consumer equipment, aka "doing it like M-audio's balanced outs." Executive summary: Use this configuration: http://www.dself.dsl.pipex.com/ampins/balanced/balfig4b.gif from http://www.dself.dsl.pipex.com/ampins/balanced/balanced.htm Details: see part about ''"hot-rod" the output stage'' from http://www.jensen-transformers.com/an/an003.pdf ......................... 2 - UNBALANCED to BALANCED INTERFACES The interfaces on the following page do NOT provide the 12 dB gain necessary to raise the nominal -10 dBV (316 mV RMS) "consumer" reference level to the nominal +4 dBu (1.23 V RMS) "pro" reference level. If the pro equipment doesn't have enough gain "reach", an active interface may be necessary. A step-up transformer, even an ideal lossless one, is not a viable source of gain in this application. Reflected impedances cause excess level losses and compromise both low frequency response and distortion. Adding a Balanced Output A simple modification to equipment with unbalanced outputs can convert it to have true balanced outputs. Get (or trace the circuit to make) a schematic of the equipment's output circuitry. Depending on available panel space, the new 3-conductor output connector can be added or used to replace the existing connector. This modification uses the existing unbalanced output as the + output and adds an impedance matched passive network to ground for the - output. In most cases, it is as simple as shown above. The output impedance of the existing output is defined by the network between the op-amp output (whose closed loop output impedance is negligible) and the output connector. An identical network to ground is then added as shown. This is also a good opportunity to "hot-rod" the output stage, by lowering and tightly matching its output impedances. Lowering RS to 100 S, ±1% and increasing CC to 220 μF, ±20%, works well with any popular op-amp known to the author, except for the TL06x, TL07x, or TL08x series (their high open loop output impedance makes them unstable with capacitive loads such as cables). For op- amps operating from symmetrical supplies up to ±18 volts, we recommend Panasonic 16 volt bi-polar electrolytics, part number ECE-A1CN221S, available from Digi-Key or other Panasonic distributors. These parts have the lowest distortion characteristic of any we've tested. The modified output will have balance as good or better than most current pro gear and, with the exception of the possible "gain reach" problem mentioned earlier, will produce excellent results in a professional environment. If the unbalanced output is retained, do not use (or connect cables to) both outputs at the same time. .............. http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&keywords=ECE-… [[ comment: not available any more as they contain Lead and not ROHS compliant, any suggested replacements?? How about those "10,000hr Japanese solid capacitor" types like they advertise for premium motherboards?? also is a 220 μF cap overdoing it, or is that what it takes do de-anemic-the-bass on a consumer card? ]] For reference: http://en.wikipedia.org/wiki/Balanced_audio#Differential_signalling .............. Signals are often transmitted over balanced connections using the differential mode, meaning the wires carry signals of opposite polarity to each other (for instance, in an XLR connector, pin 2 carries the signal with normal polarity, and pin 3 carries an inverted version of the same signal). Despite popular belief, this is not necessary for noise rejection. As long as the impedances are balanced, noise will couple equally into the two wires (and be rejected by a differential amplifier), regardless of the signal that is present on them.[1][2] A simple method of driving a balanced line is to inject the signal into the "hot" wire through a known source impedance, and connect the "cold" wire to ground through an identical impedance. Due to common misconceptions about differential signalling, this is often referred to as a quasi-balanced or impedance-balanced output, though it is, in fact, fully balanced and will reject common-mode interference. .............. Niels http://nielsmayer.com

13 years, 10 months

Can't get working Snd's LADSPA under Ubuntu

by Mike Cookson

Hello all. I have compiled latest stable snd, version 11.6. I looked for LADSPA support and found it at core, but ladspa-related scheme files (extensions) are missing. I extracted them from Debian package since could not find initial place, where they appeared. When I am loading ladspa.scm throught listener, I have message: ;use-modules: unbound variable, ladspa.scm[56] Approriate string is (use-modules (ice-9 threads)). I wrote (load "full_path_to_ice-9/threads.scm") and then got other message: ;define-module: unbound variable, /usr/share/guile/1.6/ice-9/threads.scm[64] LADSPA menu is not appeared neither at menu bar, nor plugins menu.

13 years, 10 months

Hydrogen limitation?

by Arve Barsnes

I was working on some new material and I seemingly hit on a limitation in Hydrogen. Is it not possible to make songs of more than 400 bars length (yeah, it's getting long...)? Any insight here is most welcome! Regards, Arve Barsnes

13 years, 10 months

Sample Manager & Apps That Support Elastic Time?

by Leonard Ritter

Hi everyone, I'm looking for an app that assists in organizing and previewing samples/wave files. I vaguely remember that there exists at least one app for that, but Google fails me. Any idea? Also, are there sample editing apps on Linux which support "elastic time" editing, such as Pro Tools or Cubase do? I know Ardour has timestretching and chopping up regions, but I'm looking for something more comfortable... Thanks, Leonard

13 years, 10 months

Jack shots down or creates xruns

by Thomas Hedegaard

Hi there I have a problem with jack. I have a Edirol fa-101 firewire soundcard on amd processer (2500+) with 512Mb RAM. If i have low frames/period setting ( 128) jack shots down after short time (2 - 20 sec or almost instantly if I run a program; ardour or openoffice) or if I have a high frames/period setting (1024) I get xruns. I have tried almost every setting possible and tried changing nice values on the firewire card and a lot of other stuff. Can anyone help? Kind Regards Thomas Here is a uname -a Linux thomas-laptop 2.6.31-10-rt #153-Ubuntu SMP PREEMPT RT Tue Jan 12 10:42:21 UTC 2010 i686 GNU/Linux thomas@thomas-laptop:~$ cat .jackdrc /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3 First jack messages when framesperiod is 128: 13:32:19.478 Patchbay deactivated. 13:32:19.503 Statistics reset. 13:32:19.713 ALSA connection graph change. 13:32:20.223 ALSA connection change. 13:33:28.994 Startup script... 13:33:28.996 artsshell -q terminate sh: artsshell: not found 13:33:29.400 Startup script terminated with exit status=32512. 13:33:29.401 JACK is starting... 13:33:29.402 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p128 -n3 jackd 0.118.0 Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details Memory locking is unlimited - this is dangerous. You should probably alter the line: @audio - memlock unlimited in your /etc/limits.conf to read: @audio - memlock 427074 13:33:29.436 JACK was started with PID=5101. no message buffer overruns JACK compiled with System V SHM support. loading driver .. libffado 2.0.0 built Mar 31 2010 14:47:42 13:33:31.527 Server configuration saved to "/home/thomas/.jackdrc". 13:33:31.531 Statistics reset. 13:33:31.534 Client activated. 13:33:31.537 JACK connection change. 13:33:31.552 JACK connection graph change. firewire ERR: wait status < 0! (= -1) DRIVER NT: could not run driver cycle 13:33:45.166 JACK connection graph change. 13:33:45.251 JACK connection change. jack main caught signal 12 no message buffer overruns zombified - calling shutdown handler 13:33:45.334 Shutdown notification. 13:33:45.337 JACK is stopping... 13:33:45.338 JACK is being forced... 13:33:45.539 JACK was stopped successfully. 13:33:45.540 Post-shutdown script... 13:33:45.541 killall jackd jackd: no process found 13:33:45.958 Post-shutdown script terminated with exit status=256. Second when framesperiod is 1024: 13:35:54.240 Patchbay deactivated. 13:35:54.259 Statistics reset. 13:35:54.375 ALSA connection graph change. 13:35:54.762 ALSA connection change. 13:37:02.730 Startup script... 13:37:02.731 artsshell -q terminate sh: artsshell: not found 13:37:03.137 Startup script terminated with exit status=32512. 13:37:03.138 JACK is starting... 13:37:03.139 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3 jackd 0.118.0 Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details Memory locking is unlimited - this is dangerous. You should probably alter the line: @audio - memlock unlimited in your /etc/limits.conf to read: @audio - memlock 427074 13:37:03.176 JACK was started with PID=5140. no message buffer overruns JACK compiled with System V SHM support. loading driver .. libffado 2.0.0 built Mar 31 2010 14:47:42 13:37:05.304 Server configuration saved to "/home/thomas/.jackdrc". 13:37:05.319 Statistics reset. 13:37:05.346 Client activated. 13:37:05.373 JACK connection graph change. 13:37:06.047 JACK connection graph change. 13:37:06.240 JACK connection change. 13:37:09.708 XRUN callback (1). 13:37:15.710 XRUN callback (2). 13:37:45.718 XRUN callback (3). 13:38:09.713 XRUN callback (4). 13:38:15.718 XRUN callback (5). 13:38:39.713 XRUN callback (6). 13:38:45.716 XRUN callback (7). 13:39:09.711 XRUN callback (8). 13:39:15.714 XRUN callback (9). 13:39:39.713 XRUN callback (10). 13:39:45.714 XRUN callback (11). 13:40:09.711 XRUN callback (12). 13:40:15.713 XRUN callback (13). 13:40:45.722 XRUN callback (14). 13:41:09.715 XRUN callback (15). 13:41:15.720 XRUN callback (16). 13:41:45.707 XRUN callback (17). thomas@thomas-laptop:~$ cat /proc/cpuinfo processor : 0 vendor_id : AuthenticAMD cpu family : 6 model : 10 model name : Mobile AMD Athlon(tm) XP 2500+ stepping : 0 cpu MHz : 1855.000 cache size : 512 KB fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 1 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 mtrr pge mca cmov pat pse36 mmx fxsr sse syscall mp mmxext 3dnowext 3dnow up bogomips : 3710.02 clflush size : 32 power management: ts fid vid Here is cat/proc interrupts CPU0 0: 7412489 XT-PIC-XT timer 1: 5159 XT-PIC-XT i8042 2: 0 XT-PIC-XT cascade 3: 1 XT-PIC-XT 4: 1 XT-PIC-XT 5: 1 XT-PIC-XT 6: 1 XT-PIC-XT 7: 1 XT-PIC-XT 8: 0 XT-PIC-XT rtc0 9: 1969 XT-PIC-XT acpi 10: 445734 XT-PIC-XT ohci1394, yenta, radeon@pci:0000:01:05.0 11: 32807 XT-PIC-XT ehci_hcd:usb1, ohci_hcd:usb2, ohci_hcd:usb3, eth0, ALI 5451 12: 292660 XT-PIC-XT i8042 14: 35966 XT-PIC-XT pata_ali 15: 111856 XT-PIC-XT pata_ali NMI: 0 Non-maskable interrupts LOC: 0 Local timer interrupts SPU: 0 Spurious interrupts CNT: 0 Performance counter interrupts PND: 0 Performance pending work RES: 0 Rescheduling interrupts CAL: 0 Function call interrupts TLB: 0 TLB shootdowns TRM: 0 Thermal event interrupts THR: 0 Threshold APIC interrupts MCE: 0 Machine check exceptions MCP: 25 Machine check polls ERR: 0 MIS: 0 * My Firewire card:* thomas@thomas-laptop:~$ lspci | grep Fire 00:0a.1 FireWire (IEEE 1394): Texas Instruments PCI4410 FireWire Controller (rev 02) *Htop:* RT -5 0 0 0 S 0.0 0.0 0:00.00 migration/0 13 root RT -5 0 0 0 S 0.0 0.0 0:00.00 posixcputmr/0 14 root RT -5 0 0 0 S 0.0 0.0 0:00.00 watchdog/0 4565 thomas -93 0 89936 8016 6000 S 0.0 1.4 0:00.00 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3 643 root -91 -5 0 0 0 S 0.0 0.0 0:00.00 irq/8-rtc0 4562 thomas -84 0 89936 8016 6000 S 7.0 1.4 0:04.03 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3 4566 thomas -83 0 89936 8016 6000 S 1.0 1.4 0:00.84 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3 4563 thomas -82 0 89936 8016 6000 S 6.0 1.4 0:03.65 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3 603 root -81 -5 0 0 0 S 0.0 0.0 0:00.00 irq/11-ehci_hcd 608 root -81 -5 0 0 0 S 0.0 0.0 0:00.00 irq/11-ohci_hcd 612 root -80 -5 0 0 0 S 0.0 0.0 0:00.00 irq/11-ohci_hcd 4570 thomas -78 0 68688 22936 17744 S 0.0 4.0 0:00.19 /usr/bin/qjackctl.bin 629 root -76 -5 0 0 0 S 0.0 0.0 0:00.03 irq/1-i8042 628 root -75 -5 0 0 0 S 0.0 0.0 0:01.00 irq/12-i8042 517 root -51 -5 0 0 0 S 0.0 0.0 0:00.04 irq/14-pata_ali 518 root -51 -5 0 0 0 S 0.0 0.0 0:00.09 irq/15-pata_ali 187 root -51 -5 0 0 0 S 0.0 0.0 0:00.00 irq/9-acpi 853 root -51 -5 0 0 0 S 0.0 0.0 0:00.42 irq/10-ohci1394 3571 root -51 -5 0 0 0 S 0.0 0.0 0:00.31 irq/10-yenta 3648 root -51 -5 0 0 0 S 0.0 0.0 0:00.00 irq/11-ALI 5451 3708 root -51 -5 0 0 0 S 0.0 0.0 0:00.00 irq/11-eth0 4091 root -51 -5 0 0 0 S 0.0 0.0 0:00.22 irq/10-radeon@p 5 root -50 -5 0 0 0 S 0.0 0.0 0:01.52 sirq-timer/0 8 root -50 -5 0 0 0 S 0.0 0.0 0:00.26 sirq-block/0 12 root -50 -5 0 0 0 S 0.0 0.0 0:00.22 sirq-rcu/0 4 root -50 -5 0 0 0 S 0.0 0.0 0:00.00 sirq-high/0 6 root -50 -5 0 0 0 S 0.0 0.0 0:00.00 sirq-net-tx/0 7 root -50 -5 0 0 0 S 0.0 0.0 0:00.00 sirq-net-rx/0 9 root -50 -5 0 0 0 S 3.0 0.0 0:01.81 sirq-tasklet/0 10 root -50 -5 0 0 0 S 0.0 0.0 0:00.00 sirq-sched/0 11 root -50 -5 0 0 0 S 0.0 0.0 0:00.00 sirq-hrtimer/0 17 root -2 -5 0 0 0 S 0.0 0.0 0:00.06 events/0 4561 thomas -2 0 89936 8016 6000 S 0.0 1.4 0:00.00 /usr/bin/jackd -P82 -t2000 -m -dfirewire -r44100 -p1024 -n3

13 years, 10 months

New music: And it's time for: Bach again! Bach again! :-)

by Julien Claassen

Hello everyone! So here's my first real Bach piece. The one I learnt back in 98, because we worked on it at school. I found it so lovely, that I wanted to learn it: The 2-part invention in D minor. http://juliencoder.de/nama/j_s_bach-d_minor_invention.ogg Or the dinosaur version :-) http://juliencoder.de/nama/j_s_bach-d_minor_invention.mp3 Or of course the website: http://juliencoder.de/nama/music.html I played it using the Tubed Keys Rhodes 73 gigasampler library from Sampletekk and the jreverb (standford reverb), from the CAPS LADSPA collection (unique ID: 1778). I hope you enjoy it. It's played a bit differently and I'm afraid a little sloppy. But that's art. :-) Feedback as always very welcome! 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

13 years, 10 months

RME HDSP Multiface and PulseAudio

by Steve Fosdick

I have, for the moment, my RME HDSP Multiface at home along with a nice pair of Sennheiser headphones. The headphones show up the shortcomings of the integrated audio I/F on the motherboard so I'd like to be able to route "normal" audio to the RME, e.g. use it for things like listening to music with rhtythmbox, which seems to mean persuading PulseAudio to output to it. So far the PulseAudio sound preferences does not see the HDSP even after restarting PulseAudio. The kernel module is loaded, the firmware loaded and the card works fine with jack and ardour. What do I have to do to persuade PulseAudio to see it? The distribution is Ubuntu 10.04. There is no /etc/asound.conf or .asoundrc file. I did try creating a .soundrc to enable ALSA applications to output to Jack in the hope this would cause PulseAudio to offer jack as an output option but this didn't seem to make any difference. Interestingly aplay -l shows the card and aplay -L does not: $ aplay -l **** List of PLAYBACK Hardware Devices **** card 0: DSP [Hammerfall DSP], device 0: RME Hammerfall DSP + Multiface [RME Hammerfall DSP + Multiface] Subdevices: 0/1 Subdevice #0: subdevice #0 card 1: NVidia [HDA NVidia], device 0: VT1708B Analog [VT1708B Analog] Subdevices: 1/2 Subdevice #0: subdevice #0 Subdevice #1: subdevice #1 card 1: NVidia [HDA NVidia], device 1: VT1708B Digital [VT1708B Digital] Subdevices: 1/1 Subdevice #0: subdevice #0 $ aplay -L pulse Playback/recording through the PulseAudio sound server front:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Analog Front speakers surround40:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Analog 4.0 Surround output to Front and Rear speakers surround41:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Analog 4.1 Surround output to Front, Rear and Subwoofer speakers surround50:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Analog 5.0 Surround output to Front, Center and Rear speakers surround51:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Analog 5.1 Surround output to Front, Center, Rear and Subwoofer speakers surround71:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Analog 7.1 Surround output to Front, Center, Side, Rear and Woofer speakers iec958:CARD=NVidia,DEV=0 HDA NVidia, VT1708B Digital IEC958 (S/PDIF) Digital Audio Output Any ideas, please?

13 years, 10 months

Re: [LAU] Software for recording digital audio?

by Kjetil S. Matheussen

Andrew C: > > Hey Kjetil, > > Just one thing, jack_capture_gui2 appears to overwrite the current > ja_ca_setrc when it's opened/closed, so that means if I set the option -jt > and set an alternative location for the files to be saved, they get > overwritten with whatever is in the GUI. > I think Hermann, who wrote jack_capture_gui2, needs to answer that question. > Also, would anyone know what I need to set in Rosegarden's Midi Sync > settings to get Rosegarden to send the proper messages to jack transport > (I'd have no problem with using CLI jack_capture if it weren't for this.)? > I don't understand the problem, why can't you use jack_capture instead of jack_capture_gui2?

13 years, 10 months

Re: [LAU] Deadline extended - Call for audio and audio-visual performers using FLOSS

by Jake Harries

Ooops...looks like my copy and pasting skills are bit clumsy today, so apologies if the end of that email is a little confusing. Please note we're also asking for proposals to perform for between 25 and 45 minutes <<<<<<<<<<<<<<<<<<<<<<<< http://loss.access-space.org/ <<<<<<<<<<<<<<<<<<<<<<<< -- Cheers, Jake <<<<<<<<<<<<<<<<<<<<<<<<

13 years, 10 months

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Linux-audio-user June 2010