Linux-audio-user

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20662 discussions

by Francesco Ceruti

Linux Show Player 0.3 is (finally) released! Linux Show Player (or LiSP of short) is a cue-player mainly designed for stage productions. The release see a lot of changes in code and in some GUI component, but doesn't add a lot of new functionality. Here the link for the release: https://github.com/FrancescoCeruti/linux-show-player/releases/tag/v0.3 The code is now hosted on GitHub, at https://github.com/FrancescoCeruti/linux-show-player, for any bug/issue use the github section. You can find a new site (not yet 100% completed) at http://linux-show-player.sourceforge.net For any suggestion/request write in the user group at https://groups.google.com/forum/#!forum/linux-show-player---users

10 years, 8 months

rtirq

by Len Ovens

There was a comment a while ago about not listing rtc in rtirq a while ago, that there are other better timers to use on modern systems anyway. Does audio SW generally use these other timers by default then? Is it worth while removing rtc from my rtirq config? The default rtirq list is: rtc snd usb i8042 I have found that in the case of two sound cards it is best to be more specific: rtc snd_ice1712 snd i8042 (I have removed usb because I don't use it for anything) The other question is why is i8042 included? Is it used for more than kb/mouse? It seems odd that the kb/mouse has higher priority than disk writes for example. For use of things like netjack (or other AoIP sw), should eth0 (or whatever eth is used for audio) be added to this list? (if one eth is used for audio and the other for Inet, then separating them into hi and lo priority makes sense) Asking questions because I don't know, maybe disk writes are buffered well enough it doesn't matter. I have not had problems with xruns with the setup I have, but would like to know anyway. -- Len Ovens www.ovenwerks.net

10 years, 8 months

LV2 plugin to control alsa?

by Len Ovens

This would not be portable across os... and require a config file. I am wondering if it is possible. I am thinking it would be nice to have an lv2 alsa trimpot. The idea is that it would not affect the audio passing through, but provide a control that varies the level of an alsa control. This is so a mixer strip that was composed of plugins would be able to also control the alsa preamp level if it was available. I realize figuring out which channel goes to which strip at any one time (the same input channel might be routed to a number of channels at the same time) would be _difficult_. Knowing which control changes the level one wants might be hard to automate too. The user interface would require the ability for the user to set it (them). If there was more than one for the same control they would have to track as well (alsa mixers seem to do this already though). The easy way to do this would be to throw away incoming audio and select our own. Some sort of middleware that gave a common interface for all AIs would make this much easier too. Mudita24 has MIDI control for this... but alas the midi control does not extend to the pre levels (ADC levels) where it would be most useful (or at least moving these controls outputs no midi the way the multimix controls do). So far as I know, nobody does this, even in OSX/windows land though of course it is common on both analog and digital mixboards even when the pre is at the other end of a snake or on a foreign interface. -- Len Ovens www.ovenwerks.net

10 years, 8 months

Ardour export question...

by alexus / dotcommon

(Please excuse if this is a stupid question...) I am learning Ardour doing some practice on my system (Debian stable, RT kernel, RT tuning, MAudio Audiophile 2496 PCI, 3GHz 4core CPU, 8GB RAM, JACK buffer 512). Working with a 3min stereo audio (24bit, 88.1kHz) I have noticed DSP goes to 100% when exporting (WAV)... Is it normal (simply Ardour is using all the available resources during the export) or something is going wrong (and I will have glithces/pops in the output file)? Thanks -- al3xu5 / dotcommon Support free software! Join FSF: http://www.fsf.org/jf?referrer=7535

10 years, 8 months

OT but the ultimate tribute!

by Will Godfrey

... for all paid-up geeks :) http://www.theregister.co.uk/2015/03/18/sir_terry_pratchett_http_header/ -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

10 years, 8 months

Rolling ur own software

by Russell Hanaghan

Are there any real benefits to building software on your local machine vs installing binaries, in this case all largely Ubuntu based? I've finally got this old mackbook 1,1 (Nov 2006 white 13") running linux audio with comparable results to its native OSx 10.6. Whatevah Snow LeopRd was. Set up dual boot. Basically installed "Linux-lite", pulled in kxstudio goodies and kernel. 3.13 seems to work best on T2500 dual core @ 2ghz. I can run 12 live tracks recording at 44.1/24 with 128/2 & almost zero xruns. Lots of neat hardware in the Mac for a 'puter of this vintage ... Only 32 bit. Processor is 64bit but some EFI issue I believe, kills ability to boot 64bit systems. I've removed lots of software I won't use on it like cups, samba, misc daemons nibbling away at memory n cycles. Xfce desktop. Can I gain any performance from building certain software on the machine? Mostly, I guess low or more efficient resource usage. Kernel included. Right now running SMP lowtatency kernel. I'm still if the belief that a RT kernel would be better but obviously in the deb world, not so many available. Thanks for any input. ~ Russell

10 years, 8 months

QJackCtl starts up with message window displaying this message

by david

Hi! When QJackCtl starts up now, it always displays the message window with this showing in it: 21:30:58.980 Patchbay deactivated. 21:30:58.999 Statistics reset. 21:30:59.007 Could not open ALSA sequencer as a client. ALSA MIDI patchbay will be not available. ALSA lib seq_hw.c:457:(snd_seq_hw_open) open /dev/snd/seq failed: No such file or directory Cannot connect to server socket err = No such file or directory Cannot connect to server request channel jack server is not running or cannot be started Happens whether I've got it set to use RAW or SEQ midi. I don't have QJackCtl set to start JACK on startup, I start it manually. When I start it manually, it starts up and everything audio works fine. But if I set it to use SEQ, there are no entries in MIDI or ALSA tab. If I set it to use RAW, it finds my E-MU XMidiX1 and adds 1 in and 1 out port. That puts only 1 midi_capture_1 port on the MIDI tab, though. It apparently no longer finds it as an outport (I can tell because the OUT port light on my interface doesn't come on. These are the snd kernel modules lsmod shows: snd_usb_audio 132946 2 snd_usbmidi_lib 19427 1 snd_usb_audio snd_rawmidi 18422 1 snd_usbmidi_lib snd_seq_device 5371 1 snd_rawmidi snd_hda_codec_via 19628 1 snd_hda_codec_hdmi 36654 1 snd_hda_codec_generic 51198 1 snd_hda_codec_via snd_hda_intel 21867 4 snd_hda_controller 17418 1 snd_hda_intel snd_hda_codec 89695 5 snd_hda_codec_hdmi,snd_hda_codec_via,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller snd_hwdep 6228 2 snd_usb_audio,snd_hda_codec snd_pcm 78539 5 snd_usb_audio,snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel,snd_hda_controller snd_timer 18102 1 snd_pcm snd 58113 24 snd_usb_audio,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_hda_codec_via,snd_pcm,snd_rawmidi,snd_hda_codec_generic,snd_usbmidi_lib,snd_hda_codec,snd_hda_intel,snd_seq_device soundcore 5359 2 snd,snd_hda_codec usbcore 165281 11 uas,btusb,snd_usb_audio,uvcvideo,usb_storage,snd_usbmidi_lib,ehci_hcd,ehci_pci,usbhid,xhci_hcd,xhci_pci When I start Rosegarden and go to Manage MIDI Devices, it reports no MIDI input or output port. Using QJackCtl 0.3.12 (QT 4.8.6) on 64-bit Aptosid (Debian Sid) kernel 3.19.0-1.slh.4-aptosid-amd64. And apparently the old ALSA package has been turned into a dummy and replaced with kmod? Any ideas? Thanks. See what happens when you upgrade things and *everything just seems to work* except for weird little things like this? Everything before upgrade was working with no problems. Stupid computers. ;) -- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

10 years, 8 months

jcm800 lv2 plug

by Hermann Meyer

I've just pushed a jcm800 simulation lv2 plugin to the guitarix git repository. This one is for those who are more behind the lead sounds. Guitarix users know it already as gx plugin, but for the lv2 format I've added tone, presence and master controls to the plug, so that the full jcm800 is simulated. Check it out and have fun. |git clone git://git.code.sf.net/p/guitarix/git guitarix-git|

10 years, 8 months

Re: [LAU] using home jack server (or pulse audio) as an audio sink for sound from android. possible?

by Yosef Werner

Hi Athanasios, > i wonder if I can redirect audio from my android mobile phone to a jack > server (preferably) or pulse audio server (not so preferably) through wifi, > in much the same way this can be done through bluetooth. Linux-Audio and pulse is not a good partnership and for using jack you have to build yourself the Android and for sure it has to be rooted. Not everyone can do this or wants to root his phone. An Android 4.4.2 device is needed. The code and instruction you can find on GitHub. https://github.com/KimJeongYeon/jack2_android The next problem will be wireless transfer for Jack. As far as I know netjack is not designed for wireless connections. So I'm still looking for a solution. Google has a long history in the Android latency bug, many developers left to IOs. Since Android 4.4 and the efforts by Google in 2013/14 audio programming starts to make sense in Android, but in C++ and not in Java less then Android5. Yosef

10 years, 8 months

DrumGizmo version 0.9.8.1-hotfix released!

by Bent Bisballe Nyeng

DrumGizmo version 0.9.8.1-hotfix released! After releasing 0.9.8 we discovered a rather serious bug in the resampling code that would cause sample skewing over the channels when resampling was enabled. This release fixes that. Download it from http://www.drumgizmo.org Visit us at the official irc channel at the Freenode network. Channel name #DrumGizmo. We would love to hear from you! // The DrumGizmo team

10 years, 8 months

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Linux-audio-user