Linux-audio-user January 2009

linux-audio-user@lists.linuxaudio.org

165 participants
173 discussions

Re: [LAU] Decent but not necessarily pro quality USB audio for laptop?

by david

Ken Restivo wrote: > On Tue, Jan 06, 2009 at 12:17:08AM -1000, david wrote: >> Ken Restivo wrote: >> >>>>>> Any opinions on the following devices? >>>>> Sorry, I do not have any input on any of the particular devices you >>>>> list. >>>> No problem, there are way too many audio devices around to keep track of! >>>> >>> I've been happy with my M-Audio FastTrack Pro USB for almost 18 months now. >>> >>> -ken >> Thanks for the testimony, Ken, but that's way beyond my needs! > > Really? It was $60 used on Craigslist. Sorry, didn't mean to confuse. While the $60 would have barely fit the budget, the features of the FastTrack Pro USB are more than I need. I have a small hardware mixer with jacks for microphones and such. > I mean, as for a cheap audio interface, I've used a no-brand Taiwanese $6 USB audio card for years too. I looked at some of those. Like the Cyba one at newegg.com. I could never tell if they were supported by Linux. FWIW, I almost dropped the idea of a new sound device for the laptop in favor of ordering a 1010LT for the server ... -- David gnome(a)hawaii.rr.com authenticity, honesty, community

16 years, 11 months

LADSPA SDK: plugin access with analyseplugin

by Joel Roth

Hi LADSPA experts and tinkerers, Julien Claassen observed that the LADSPA SDK program 'analyseplugin' doesn't seem to return output for some plugins. For example, Fons Adriaensen's plugin G2reverb. $ analyseplugin G2reverb Failed to load plugin "G2reverb": G2reverb: cannot open shared object file: No such file or directory In my Debian system, the plugin is named g2reverb.so. I discovered that if I rename it to be G2reverb.so and try again: $ analyseplugin G2reverb Plugin Name: "Stereo reverb" Plugin Label: "G2reverb" Plugin Unique ID: 1950 Maker: "Fons Adriaensen <fons.adriaensen(a)alcatel.be>" .... So it looks like analyseplugin needs to lowercase the plugin label before searching for it. I tried recompiling the LADSPA-SDK and see the same behavior. Couldn't that be fixed with just a bit-shift somewhere? I wonder if someone could provide a patch. It matters to me, because my project, Nama, uses analyseplugin to get information about available plugins. Processing text from a pipe is much easier for Perl and myself than some clever C-XS-fu to get the same information. Even renaming all the files in /usr/lib/ladspa would be easier. Regards, Joel -- Joel Roth

16 years, 11 months

[ann] MotionTrackOSC

by nescivi

Hiho, I made another little app in the vein of WiiOSC. This time for Motion Tracking using video, or rather computer vision. The program uses the OpenCV libraries, and of course the liblo libraries. And it is distributed with a SuperCollider class and help file, so you can start and use the program from and with that program right away. For more info, download and a short demo video see my website at: http://www.nescivi.nl/?p=92 Happy new year! sincerely, Marije

16 years, 11 months

Decent but not necessarily pro quality USB audio for laptop?

by Susanne Schneider

despite having just extended my set by a firewire device I still can strongly recommend the Lexicon Omega Studio USB, up to 4 Inputs for recording, thereof 2 with really good mic preamps, instrument in, Midi of course, digital in and out, really fine hardwaremixer... it's just to buy for around 160 Euro... works fine at my Laptop with 128fr/2p and kernel 2.6.26.6-rt11 best Susanne

16 years, 11 months

what's happened to rezound?

by andy baxter

Does anyone know what happened to rezound? I use it as a handy wave editor - I prefer it to audacity for simple single track editing. But it seems to be getting harder to get a running version without compiling your own (the ubuntu version hasn't worked for ages), and the last (beta) release was in Jan 2007. It's a really nice editor (IMHO), so it's sad to think it might have been abandoned. http://rezound.sourceforge.net/ andy

16 years, 11 months

jack crash at rosegarden start up with NI Audio Kontrol 1 (snd_usb_caiaq bug?)

by Marco Santamaria

Hi, it's about one year that I'm using my Native Instruments Audio Kontrol 1 (USB2 audio/MIDI interface) only with audio applications and it has been working well so far. Now I'm trying to use it with Rosegarden (MIDI) and, as soon as I start Rosegarden, JACK crashes, the process jackd becomes "uninterruptible" and with the command dmesg I find the following new lines [ 1935.173876] BUG: unable to handle kernel NULL pointer dereference at virtual address 00000044 [ 1935.173885] printing eip: f8a5f6fd *pde = 00000000 [ 1935.173891] Oops: 0000 [#1] PREEMPT SMP [ 1935.173896] Modules linked in: isofs udf ipv6 af_packet i915 drm rfcomm l2cap bluetooth ppdev acpi_cpufreq cpufreq_ondemand cpufreq_conservative cpufreq_stats freq_table cpufreq_userspace cpufreq_powersave dock container sbs sbshc iptable_filter ip_tables x_tables sbp2 parport_pc lp parport snd_hda_intel snd_usb_caiaq snd_hwdep snd_pcm_oss snd_mixer_oss arc4 snd_seq_oss snd_pcm ecb blkcipher snd_seq_midi snd_page_alloc joydev snd_rawmidi snd_seq_midi_event snd_seq iwl3945 sdhci serio_raw mmc_core iwlwifi_mac80211 video output cfg80211 battery led_class ac snd_timer snd_seq_device wmi_acer button snd evdev dcdbas iTCO_wdt iTCO_vendor_support intel_agp shpchp pci_hotplug pcspkr soundcore agpgart psmouse ext3 jbd mbcache sg sr_mod cdrom sd_mod b44 ata_generic ssb mii ohci1394 ieee1394 ata_piix pata_acpi libata scsi_mod ehci_hcd uhci_hcd usbcore thermal processor fan fuse [ 1935.173964] [ 1935.173967] Pid: 1421, comm: IRQ-18 Not tainted (2.6.24-19-rt #1) [ 1935.173970] EIP: 0060:[<f8a5f6fd>] EFLAGS: 00010292 CPU: 1 [ 1935.173979] EIP is at snd_rawmidi_transmit_peek+0x1d/0x100 [snd_rawmidi] [ 1935.173982] EAX: 00000000 EBX: f7106264 ECX: 0000003d EDX: f7106407 [ 1935.173985] ESI: ffffffea EDI: 00000000 EBP: f7106407 ESP: df85be38 [ 1935.173988] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 preempt:00000001 [ 1935.173991] Process IRQ-18 (pid: 1421, ti=df85a000 task=f7d45320 task.ti=df85a000) [ 1935.173993] Stack: 0000003d 00000000 f7106264 00000000 00000000 df83fc00 f8b8cc09 00000000 [ 1935.174000] f7106264 f710630c 00000000 df83fc00 df83fc00 f710630c f888c888 00000008 [ 1935.174007] df83fd08 00000000 f710630c f8870770 f728a0c0 f728a0c0 ffffff8d f721e180 [ 1935.174014] Call Trace: [ 1935.174021] [<f8b8cc09>] snd_usb_caiaq_midi_send+0x29/0x80 [snd_usb_caiaq] [ 1935.174034] [<f888c888>] usb_hcd_giveback_urb+0x48/0xc0 [usbcore] [ 1935.174064] [<f8870770>] ehci_urb_done+0x70/0xb0 [ehci_hcd] [ 1935.174075] [<f887153f>] qh_completions+0x24f/0x430 [ehci_hcd] [ 1935.174087] [<f8870770>] ehci_urb_done+0x70/0xb0 [ehci_hcd] [ 1935.174096] [<f887293e>] ehci_work+0x51e/0x810 [ehci_hcd] [ 1935.174103] [<c010b1e3>] sched_clock+0x13/0x40 [ 1935.174116] [<c0129199>] dequeue_task_rt+0xb9/0x1c0 [ 1935.174129] [<f8875498>] ehci_irq+0x158/0x1c0 [ehci_hcd] [ 1935.174142] [<f888cb7b>] usb_hcd_irq+0x2b/0x60 [usbcore] [ 1935.174166] [<c016a9cc>] handle_IRQ_event+0x5c/0x100 [ 1935.174178] [<c016b00a>] thread_simple_irq+0x4a/0x90 [ 1935.174185] [<c016b959>] do_irqd+0x229/0x290 [ 1935.174194] [<c016b730>] do_irqd+0x0/0x290 [ 1935.174199] [<c0141fc2>] kthread+0x42/0x70 [ 1935.174203] [<c0141f80>] kthread+0x0/0x70 [ 1935.174209] [<c0105857>] kernel_thread_helper+0x7/0x10 [ 1935.174217] ======================= [ 1935.174219] Code: 24 10 83 c4 14 c3 bf ea ff ff ff eb e3 90 83 ec 18 89 74 24 0c be ea ff ff ff 89 6c 24 14 89 d5 89 5c 24 08 89 7c 24 10 89 0c 24 <8b> 58 44 8b 7b 04 85 ff 0f 84 8e 00 00 00 8d 43 20 31 f6 89 44 [ 1935.174256] EIP: [<f8a5f6fd>] snd_rawmidi_transmit_peek+0x1d/0x100 [snd_rawmidi] SS:ESP 0068:df85be38 [ 1935.174265] ---[ end trace 9090d02b798b5496 ]--- I already asked to the Rosegarden and JACK people, but they couldn't help me: it seems to be a driver related problem, as I can happily use Rosegarden if I run JACK with the internal Intel sound card. The program versions I'm using are: jackd 0.116.1, rosegarden 1.7.2. Here's some other outputs: $ uname -a Linux din6400 2.6.24-19-rt #1 SMP PREEMPT RT Thu Aug 21 02:08:03 UTC 2008 i686 GNU/Linux $ cat /proc/asound/version Advanced Linux Sound Architecture Driver Version 1.0.17. Compiled on Jan 3 2009 for kernel 2.6.24-19-rt (SMP). $ grep VERSION_STR /usr/include/alsa/version.h #define SND_LIB_VERSION_STR "1.0.17a" $ aplay -l **** Lista di PLAYBACK dispositivi hardware **** scheda 0: Intel [HDA Intel], dispositivo 0: STAC92xx Analog [STAC92xx Analog] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 0: Intel [HDA Intel], dispositivo 1: STAC92xx Digital [STAC92xx Digital] Sottoperiferiche: 1/1 Sottoperiferica #0: subdevice #0 scheda 1: A1 [Audio Kontrol 1], dispositivo 0: Audio Kontrol 1 [Audio Kontrol 1] Sottoperiferiche: 1/2 Sottoperiferica #0: subdevice #0 Sottoperiferica #1: subdevice #1 $ cat /proc/interrupts CPU0 CPU1 0: 5438968 0 IO-APIC-edge timer 1: 5123 0 IO-APIC-edge i8042 8: 7 0 IO-APIC-edge rtc 9: 2 0 IO-APIC-fasteoi acpi 12: 570309 0 IO-APIC-edge i8042 14: 16584 0 IO-APIC-edge libata 15: 7712 0 IO-APIC-edge libata 16: 312032 0 IO-APIC-fasteoi i915@pci:0000:00:02.0 17: 2 0 IO-APIC-fasteoi ohci1394 18: 269358 0 IO-APIC-fasteoi uhci_hcd:usb1, ehci_hcd:usb5 19: 3999 0 IO-APIC-fasteoi uhci_hcd:usb2, HDA Intel 20: 0 0 IO-APIC-fasteoi uhci_hcd:usb3 21: 0 0 IO-APIC-fasteoi uhci_hcd:usb4 22: 7638 0 IO-APIC-fasteoi eth0 23: 0 0 IO-APIC-fasteoi sdhci:slot0 221: 31667 0 PCI-MSI-edge iwl3945 NMI: 0 0 Non-maskable interrupts LOC: 266694 2894868 Local timer interrupts RES: 1091345 1871342 Rescheduling interrupts CAL: 12287 11042 function call interrupts TLB: 1395 1581 TLB shootdowns TRM: 0 0 Thermal event interrupts SPU: 0 0 Spurious interrupts ERR: 0 MIS: 0 I do not include the jackd and rosegarden outputs becouse they are quite long, but, if you think they are useful to understand what is going on, I can send them too. Any ideas? Thank you Marco

16 years, 11 months

Take one audio/midi-track to edit another (Record a professionel singer and use it to shape a amateur-recording)

by Nils Gey

Hi people, a few years ago I saw a TV-magazin where they showed how "music is produced". It was all about pop and "Schlager" music. They produced a playback and recorded the solo-voice track with a profesionnel, hired singer, which left afterwards. Then they took a nice looking womand from the street because they said "Good look is more important than good voice" and showed her the playback track including the already recorded voice. All the "rising star" had to do was to sing most exactly like the professional. They recorded it, used some autotuner and then came the interesting part. They took the dynamic curve from the pro and told the programm to use that dynamic information to compress/shape/whateverMagic the amateurs recording. So it sounded like the amateurs voice but with a controlled and great dynamic expression. Any idea how to do that with the avaible linux apps? Nils -- Nils Gey <list(a)nilsgey.de>

16 years, 11 months

Re: [LAU] more Ingen questions

by Tim Jones

Josh, My DSSI plugins don't show up in Ingen either. In fact, there was no trace of any DSSI components in my build process. I found this though: http://dev.drobilla.net/changeset/838 It seems DSSI hasn't been in Ingen for over a year now. :( Not sure about your LADSPA issue. If I understand your MIDI problem correctly, you'll want to right click on the canvas, then select Input -> Event. For me, this creates a red box labelled "event_input_1" and I now also see in my qjackctl connections a MIDI input for Ingen called "event_input_1". So you can now wire your red box to other red inlets on the canvas, and do the proper hookups in jack as well for your MIDI keyboard. Ingen is still in early stages of development, still in svn and without a stable release posted, so there will not be any documentation for it really. I've only been messing with it for a couple of weeks now, but it definitely seems easier to figure out than Pd. I don't think you can expect to do anything really productive in Pd straight away, but there is a lot more documentation (and a visibly bigger community) out there for Pd than for Ingen. I think I found this little guide fairly useful: http://en.flossmanuals.net/PureData/ I'm making slow progress in Pd myself. I frequently quit this stuff for a while, then come back. Good luck!

16 years, 11 months

tool for slowing down recordings for practice and transcription

by Joseph Sheedy

Hello LAU, I'm looking for a tool with which to slow down recordings so I can more easily transcribe melodies. Up to now I've been importing the audio into Ardour and using the time stretch tool to create a slower copy of the tracks. It's not easy to try different speeds like this though. Sometimes I set the playback speed wheel to 50% to hear it at half speed down an octave, but that's not great either. I know there are some shareware tools out there designed for this, such as http://www.practice-perfect.com/transcribe.html. What do you like to use? Thanks! --Joseph Sheedy

16 years, 11 months

[PATCH] [RT] tasklets: fix typo in tasklet_hi_action

by Adam Sampson

[l-a-u CCed because we've been talking about this problem there recently, and that's what prodded me to do the bisection to track it down... fortunately the -rt8 to -rt9 interdiff was pretty small!] Subject: [PATCH] [RT] tasklets: fix typo in tasklet_hi_action Fix a typo in tasklet_hi_action -- using the wrong tasklet list when removing actions. This appears to be what was causing the ALSA sequencer device not to work in 2.6.26 with the RT patch: the sequencer was flaky in -rt1 to -rt8, and just hung in -rt9 and later, after tasklets-fix-tasklet_hi_schedule.patch which fixed the same typo when adding to the list. I guess that's because before -rt9 the actions were going onto the wrong list, whereas after -rt9 they were being lost entirely once the first one had been performed. It seems happy now, anyway. Signed-off-by: Adam Sampson <ats(a)offog.org> --- linux-2.6.26/kernel/softirq.c_orig 2009-01-04 14:41:06.000000000 +0000 +++ linux-2.6.26/kernel/softirq.c 2009-01-04 14:41:49.000000000 +0000 @@ -657,7 +657,7 @@ local_irq_disable(); list = __get_cpu_var(tasklet_hi_vec).head; __get_cpu_var(tasklet_hi_vec).head = NULL; - __get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_vec).head; + __get_cpu_var(tasklet_hi_vec).tail = &__get_cpu_var(tasklet_hi_vec).head; local_irq_enable(); __tasklet_action(a, list); -- Adam Sampson <ats(a)offog.org> <http://offog.org/>

16 years, 11 months

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Linux-audio-user January 2009