Linux-audio-user January 2015

linux-audio-user@lists.linuxaudio.org

68 participants
69 discussions

[LAU] Merging Midi with "VAST Programmer" and controller keyboard

by Iain Mott

Hi list, I'm playing around with a no-longer-developed java-based editor for Kurzweil syths called "VAST Programmer" (VP) and I have a question about MIDI on my Ubuntu Studio 14.04 in order to use a MIDI keyboard together with the editing software. My MIDI hardware includes: A Behringer UMX490 USB controller keyboard Kurzweil K2000R Synth Hammerfall DSP Multiface I. Editing with the VP, which works by sending and receiving system exclusive messages, requires that the K2000R's MIDI in and out are connected to the out and in of the Multiface. The UMX490 therefore needs to be connected to the computer via USB. Both the UMX490 and the Hammerfall DSP multiface show up in Qjackctl under the ALSA tab as both readable and writable clients. When VP starts for the first time it asks the user to select from a list of available MIDI in and outs. I selected the HDSP which is displayed as "DSP [hw:0,0,0]". VP then opens and allows me to edit the K2000. VP does not show up in qjackctl however and once connected to the HDSP I can no longer make a connection between the UMX490 (readable client) and the Hammerfall DSO (writable client) in order to play the synth. The HDSP seems to be fully occupied. It seems that I need a type of "MIDI merge" function to have the editor and keyboard functioning at once. I remember back in the 80s(!) little hardware boxes existed for this, but there must be a way of doing this software. Can someone please send suggestions? **** If anyone googles this and wishes to run VP on Linux, note that it was necessary to create the directory "/etc/.java/.systemPrefs/com" and make it user-writable with "sudo chmod 777 /etc/.java/.systemPrefs/com" in order to get it to run. VP can be downloaded from here: http://www.tangentcats.com/Downloads.htm To run, expand the zip file, enter into the main directory of the resource and enter: java -Xms256m -Xmx256m -jar "vastp.jar" You'll also need a "VAST" type Kurzweil syth connected via MIDI for it to run. There's a MIDI "Midi Compatibility issue" patch on the download page that didn't work for me - the GUI was sized strangely and unusable.

11 years, 1 month

[LAU] How to combine separate video and audio tracks together?

by david

I've done nothing with video except play them from YouTube. I've noticed that YouTube separates HD1080 video from the audio tracks, meaning I can't just download the HD1080 vid and watch it comfortably using my USB sound card. But I can download the HD1080 vid and the audio track separately. Ideas? Thanks. -- David W. Jones gnome(a)hawaii.rr.com authenticity, honesty, community http://dancingtreefrog.com

11 years, 1 month

Re: [LAU] Audio over WIFI

by Leonardo Gabrielli

> On Wed, 21 Jan 2015, Leonardo Gabrielli wrote: > > > In reality of the 16ms latency I mentioned, 5.3ms are the A/D and 5.3ms > are the > > D/A (48khz, 2 periods of 128 samples in JACK at both sides). The > remainder > > That does not need to be. My 10 year old P4 was running an ice1712 at > 48k/16/2 (.66ms) with no xruns. The machine I'm referring to is a Cortex A8 using its own audio codec, and I think the drivers are not exceptional. Lowering the period size was not possible. I was using Debian Stable. (going off-topic): what sound card did you use to get the 0.66ms latency and what distro? Other comments: network audio requires to serve not only audio card interrupts but also NIC interrupts in case of ethernet, or USB/SPI in case of wifi chips. The drivers must written very carefully. I've often seen the NIC interrupt routine preempt jack audio clients. Furthermore, network drivers are written for throughput, not latency. These two issues make me wonder whether a general purpose OS could serve the purpose well. Or maybe it's just I tend to prefer the low-level solutions... One thing yet to check: the original 802.11 specifications allowed for a contention-free period, still have to check whether current 802.11n and 802.1ac AP still allow for it. Best, Leonardo

11 years, 1 month

[LAU] [ANN] Vee One Suite 0.6.0 - A third official beta release!

by Rui Nuno Capela

Howdy, Once again, the 'Vee One Suite' of 'old-school' software instruments, featuring a 'gang of three' made of synthv1 [1] as a polyphonic synthesizer, samplv1 [2] a polyphonic sampler and drumkv1 [3] as a drum-kit sampler, are being released into the wild as in so called 'beta' phase. Changes for this one third beta release are as follows: - MIDI bank-select/program-changes is now supported, for patch, preset and/or instrument program control. - New Help/Configure dialog is introduced for editing the also new MIDI bank/programs interface and user preference options as well (new home of the old Help/Use native dialogs option). - Presets may now be specified by base name, as an alternative to the complete preset file-path on command line argument (re. stand-alone JACK client). - Fixed parameters A/B comparison swap. As usual, all made available in dual form: - a pure stand-alone JACK [4] client with JACK-session, NSM [5] (Non Session management) and both JACK MIDI and ALSA [6] MIDI input support; - a LV2 [7] instrument plug-in. The Vee One Suite are free and open-source Linux Audio software, distributed under the terms of the GNU General Public License (GPL) [8] version 2 or later. Details are dumped below, business as usual ;) * synthv1 - an old-school polyphonic synthesizer [1] * synthv1 0.6.0 (third official beta) has been released! synthv1 is an old-school all-digital 4-oscillator subtractive polyphonic synthesizer with stereo fx. LV2 URI: http://synthv1.sourceforge.net/lv2 website: http://synthv1.sourceforge.net downloads: http://sourceforge.net/projects/synthv1/files - source tarball: http://download.sourceforge.net/synthv1/synthv1-0.6.0.tar.gz - source package: http://download.sourceforge.net/synthv1/synthv1-0.6.0-19.rncbc.suse132.src.… - binary packages: http://download.sourceforge.net/synthv1/synthv1-0.6.0-19.rncbc.suse132.i586… http://download.sourceforge.net/synthv1/synthv1-0.6.0-19.rncbc.suse132.x86_… * samplv1 - an old-school polyphonic sampler [2] * samplv1 0.6.0 (third official beta) has been released! samplv1 is an old-school polyphonic sampler synthesizer with stereo fx. LV2 URI: http://samplv1.sourceforge.net/lv2 website: http://samplv1.sourceforge.net downloads: http://sourceforge.net/projects/samplv1/files - source tarball: http://download.sourceforge.net/samplv1/samplv1-0.6.0.tar.gz - source package: http://download.sourceforge.net/samplv1/samplv1-0.6.0-19.rncbc.suse132.src.… - binary packages: http://download.sourceforge.net/samplv1/samplv1-0.6.0-19.rncbc.suse132.i586… http://download.sourceforge.net/samplv1/samplv1-0.6.0-19.rncbc.suse132.x86_… * drumkv1 - an old-school drum-kit sampler [3] * drumkv1 0.6.0 (third official beta) has been released! drumkv1 is an old-school drum-kit sampler synthesizer with stereo fx. LV2 URI: http://drumkv1.sourceforge.net/lv2 website: http://drumkv1.sourceforge.net downloads: http://sourceforge.net/projects/drumkv1/files - source tarball: http://download.sourceforge.net/drumkv1/drumkv1-0.6.0.tar.gz - source package: http://download.sourceforge.net/drumkv1/drumkv1-0.6.0-15.rncbc.suse132.src.… - binary packages: http://download.sourceforge.net/drumkv1/drumkv1-0.6.0-15.rncbc.suse132.i586… http://download.sourceforge.net/drumkv1/drumkv1-0.6.0-15.rncbc.suse132.x86_… References: [1] synthv1 - an old-school polyphonic synthesizer http://synthv1.sourceforge.net/ [2] samplv1 - an old-school polyphonic sampler http://samplv1.sourceforge.net/ [3] drumkv1 - an old-school drum-kit sampler http://drumkv1.sourceforge.net/ [4] JACK Audio Connection Kit http://jackaudio.org/ [5] NSM, Non Session Management http://non.tuxfamily.org/nsm/ [6] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [7] LV2, Audio Plugin Standard, the extensible successor of LADSPA http://lv2plug.in/ [8] GNU General Public License http://www.gnu.org/copyleft/gpl.html See also: http://www.rncbc.org/drupal/node/857 Enjoy && have fun. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

11 years, 1 month

Re: [LAU] Which kernel do you use?

by Jeff Sandys

> From: Hermann Meyer <brummer-(a)web.de> > To: linux-audio-user <linux-audio-user(a)lists.linuxaudio.org> > Subject: [LAU] Which kernel do you use? > Message-ID: <54C22928.2000704(a)web.de> > Content-Type: text/plain; charset=utf-8; format=flowed > > I've get a new (used) mobo, and played with the kernel version to use. > So far I've tested all from 3.19.0-rc5 down to 3.4.104 > > Those, were rt-patches available I test as rt-kernel. > Best results, I only get with the 3.4 series, all later kernels > introduce Xruns here, sporadic, unrelated to the dsp load, even, when > just jack is running. > I build then all with the same configuration, play a bit with > configurations deselect hyper-threading on the latest kernels, use > threadedirqs, all to no avail. Only 3.4.xxx-rt kernel run absolute smooth. > So, which kernels with witch configuration do you all use? > <snip> > Graphics: Card: NVIDIA GT216 [GeForce GT 220] > bus-ID: 01:00.0 chip-ID: 10de:0a20 > Display Server: X.Org 1.16.1.901 drivers: nouveau (unloaded: > fbdev,vesa) > I see you are using the nouveau driver for NVIDIA. Other RT users with NVIDIA have commented on performance issues with nouveau and had better performance with the NVIDIA akmods. -- Jeff

11 years, 1 month

[LAU] need help uninstalling non installed from source

by Atte

Hi I wanna use non from kxstudio instead of my compiled version. How do I completely remove everything installed by hand? Here's what I did and the result: atte@skagen:~/software/shared/non$ sudo ./waf uninstall Waf: Entering directory `/mnt/data/atte/medium/software/non/build' - remove /usr/local/share/icons/hicolor/128x128/apps/non-mixer.png - remove /usr/local/share/pixmaps/non-mixer/icon-256x256.png - remove /usr/local/share/doc/non-mixer/MANUAL.html - remove /usr/local/share/pixmaps/non-mixer/panner-plane-502x502.png - remove /usr/local/share/icons/hicolor/16x16/apps/non-mixer.png - remove /usr/local/share/icons/hicolor/192x192/apps/non-mixer.png - remove /usr/local/share/icons/hicolor/256x256/apps/non-mixer.png - remove /usr/local/share/icons/hicolor/32x32/apps/non-mixer.png - remove /usr/local/share/icons/hicolor/36x36/apps/non-mixer.png - remove /usr/local/share/icons/hicolor/48x48/apps/non-mixer.png - remove /usr/local/share/icons/hicolor/512x512/apps/non-mixer.png - remove /usr/local/share/pixmaps/non-mixer/panner-plane-802x802.png - remove /usr/local/share/doc/non-mixer/controls.png - remove /usr/local/share/icons/hicolor/64x64/apps/non-mixer.png - remove /usr/local/share/doc/non-mixer/group-dropdown.png - remove /usr/local/share/pixmaps/non-mixer/panner-plane-92x92.png - remove /usr/local/share/icons/hicolor/72x72/apps/non-mixer.png - remove /usr/local/share/doc/non-mixer/icon.png - remove /usr/local/share/pixmaps/non-mixer/panner-sphere-502x502.png - remove /usr/local/share/icons/hicolor/96x96/apps/non-mixer.png - remove /usr/local/share/doc/non-mixer/mixer-strips.png - remove /usr/local/share/doc/non-mixer/modules.png - remove /usr/local/share/doc/non-mixer/new-project.png - remove /usr/local/share/doc/non-mixer/non-mixer-and-non-daw-in-patchage.png - remove /usr/local/share/pixmaps/non-mixer/panner-sphere-802x802.png - remove /usr/local/share/doc/non-mixer/non-mixer-complex.png - remove /usr/local/share/pixmaps/non-mixer/panner-sphere-92x92.png - remove /usr/local/share/doc/non-mixer/single-strip.png - remove /usr/local/share/doc/non-mixer/spatialization-console.png - remove /usr/local/share/doc/non-mixer/spatialization-in-mpe.png - remove /usr/local/share/doc/non-mixer/spatialization-on-strip.png - remove /usr/local/share/doc/non-mixer/spatializer-module.png Waf: Leaving directory `/mnt/data/atte/medium/software/non/build' Build failed Traceback (most recent call last): File "/mnt/data/atte/medium/software/non/.waf-1.8.0-f4f5e7c10cf1681215dc56fc3b992944/waflib/Task.py", line 103, in process ret=self.run() File "/mnt/data/atte/medium/software/non/.waf-1.8.0-f4f5e7c10cf1681215dc56fc3b992944/waflib/Build.py", line 456, in run return self.generator.exec_task() File "/mnt/data/atte/medium/software/non/.waf-1.8.0-f4f5e7c10cf1681215dc56fc3b992944/waflib/Build.py", line 481, in exec_symlink_as self.generator.bld.do_link(src,destfile,tsk=self) TypeError: do_link() got an unexpected keyword argument 'tsk' Any help appreciated! -- Atte http://atte.dk http://a773.dk

11 years, 1 month

Re: [LAU] Audio over WIFI

by Leonardo Gabrielli

Thanks Len for the useful feedback. > In such a case, it would not be possible to add a WIFI that went to AP > then snake then FOH mix then monitor as there would be close to 30ms. The > WIFI would have to be a dirrect input to the FOH mix. > > In reality of the 16ms latency I mentioned, 5.3ms are the A/D and 5.3ms are the D/A (48khz, 2 periods of 128 samples in JACK at both sides). The remainder approx. 5.3ms is buffering large enough to compensate for the jittery behavior of network delay. In other words a packet needs reasonably less than <5.3ms to fly from one end to the other. With an AP things are a bit more delicate for the only reason that the packet must fly twice, i.e. the transmitter must get access to the medium ASAP, and then the AP must get access to the medium ASAP to relay the packet to the recipient. And they must meet the deadline imposed by the receiver JACK cycle. Medium access with 802.11 is the biggest issue in my experience. However, with an AP it won't be 30ms, it will be much lower. Obviously a TDMA mechanism would be much more useful for the transmission rather than the 802.11 MAC, but improvements can be done. There is one AES paper from a guy in Finland who managed to send 8channel audio at 192khz in packets of about 50samples each, see http://www.aes.org/e-lib/browse.cfm?elib=16138 I will take a look again at the AES67 minimum requirements, I guess to reach them a lot to development must be done. Basically the A/D and D/A must be done with 2 ping-pong buffers of 32 samples at 48khz, and hope that the network access and transport can be carried on reliably in 1.8ms. Nothing you could do with a general purpose platform or OS at the moment, but a good challenge for the future years. Cheers, Leonardo

11 years, 1 month

Re: [LAU] Audio over WIFI

by Leonardo Gabrielli

Thanks Len for the useful feedback. > I was going to say 10ms is about where I start to feel disconnected from > what I am playing, but I realize I am thinking one way and round trip > would be about 20ms. So 16ms might be well workable. > > Psychoacoustic tests (many of them from the CCRMA SoundWire team and others) shows that 21-25ms is acceptable to keep a steady tempo. Larger values make the performers slow down, very low values make them accelerate! AFAIK in musical instrument design the 10ms figure is taken as a threshold for your instrument response (e.g. keypress --> sound), but in performance the values can be higher as said. Your inputs are interesting, and yes, I think AES67 could be the first step towards integration. More soon... Leonardo

11 years, 1 month

[LAU] K2000 / Zip drives / Linux

by Iain Mott

Hi list, I have a Kurzweil K2000R synth and a scsi zip 100 drive. I'd like to be able to download files from the web and transfer to the synth. I found a USB Zip 100 drive available which I'd like to connect to my Linux PC so that I can transfer the disks across to the scsi drive on the K2000. The USB drive is here: http://produto.mercadolivre.com.br/MLB-621544980-zip-drive-iomega-zerado-co… Does anyone know if this will work? Will I have any trouble with this drive on Linux working with K2000 formatted disks? Thanks,

11 years, 1 month

Re: [LAU] Audio over WIFI

by Leonardo Gabrielli

Just to bring the discussion back to its original topic, I see and know already that audio over 802.11 is always thought of as a geek thing when not an insanity, but at my institution we felt this as good challenge for engineering research and I've been working on that as part of my PhD studies in the last two years. Updates and material about the project are reported at our research group webpage http://a3lab.dii.univpm.it/research/wemust The project, called WeMUST, i.e. wireless music studio, was started to test current network technologies in a *studio*, but later we also addressed live stage usage and a concert was performed last summer on the sea. In that case we acquired signal with Debian-based ARM platforms (beagleboard xm) and sent it to special devices from Mikrotik through Ethernet. The Mikrotik devices have directional antennas and created 802.11a bridges from sea to land. The networking topology allowed for monitoring and the round-trip latency allowed by the system was 16ms at lowest (but could be reduced with a different HW choice). The musicians could synchronize well and all had the same latency, imposed by JACK, running on both the ARM and the PC mixing the signal on the land. To recap, my opinion is that 802.11 can be as good as any other wireless technology in providing music and compared to legacy analog techniques the quality is not compromised (unless the link is so bad that connection breaks/packets get lost). Of course the 802.11 family of protocols is mainly targeted at throughput and best effort delivery, this is why the audio community must demand for amendments that allow a robust audio link, instead of neglecting the opportunity and relegating wireless connectivity to a marketing feature (as it is up to know, just a gimmick for product brochures to boost sales, showing ultra-cool ipad apps for remote control and nothing more). With this I don't mean saying that we should replace affordable and reliable audio cables with ultra-expensive wireless stuff. My goal, as a researcher is to thrive into the technical and usability challenges of a technology so widespread nowadays, show what can be done and check from the industry or the potential users if there are new applications that are opened by wireless and most importantly networking. Networking is a key aspect, indeed, because a point-to-point link is not novel, but if wireless connectivity can provide integration of functionalities and devices at low extra cost, it is worth investigating, IMO, at least at the academic level. Cheers, Leonardo

11 years, 1 month

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Linux-audio-user January 2015