Linux-audio-dev July 2013

linux-audio-dev@lists.linuxaudio.org

14 participants
19 discussions

by Frank Kober

Hi, QMidiArp 0.5.2 has just seen the light of the day. It brings mainly two improvements. One is a comeback, that of tempo changes on the fly, and that now includes also tempo changes of a potential Jack Transport master. Also the Jack Transport starting position is finally taken into account, so that QMidiArp should be in sync also when starting the transport master not at zero. The second one is Non Session Manager support, mainly thanks to the work done by Roy Vegard Ovesen! Note that for compiling in NSM support you will now need liblo as dependency. Enjoy, and enjoy LAC in Graz this year Frank ________________________________ QMidiArp is an advanced MIDI arpeggiator, programmable step sequencer and LFO. Everything is on http://qmidiarp.sourceforge.net qmidiarp-0.5.2 (2013-05-09) New Features o Tempo changes are again possible while running, both manually or by a Jack Transport Master o Jack Transport position is now taken into account when starting, QMidiArp used to start always at zero o Muting and sequencer parameter changes can be deferred to pattern end using a new toolbutton o Modules in the Global Storage window have mute/defer buttons o Global Storage location switches can be set to affect only the pattern o Non Session Manager support with "switch" capability (thanks to Roy Vegard Ovesen) General Changes o NSM support requires liblo development headers (liblo-dev package)

10 years, 10 months

OpenAV Productions : Sorcer

by Harry van Haaren

Hey Everybody, I'm happy to announce OpenAV productions: http://openavproductions.com OpenAV productions is a label under which I intend to release my linux-audio software projects. The focus of the software is on the workflow of creating live-electronic music and video. The release system for OpenAV productions is one based on donations and time, details are available on http://openavproductions.com/support Sorcer is a wavetable synth, and is ready for release. Check out the interface and demo reel on http://openavproductions.com/sorcer Greetings from the LAC, -Harry

11 years, 2 months

itop

by elboulangero

Hello everyone, lately I had to fight big XRUN troubles, and thanks to this forum I finally solved that. This excellent thread saved me: http://linuxaudio.org/mailarchive/lau/2012/9/5/192706 On my long quest, I tried to see a little bit more what happened with the IRQs on my system. I searched for a kind of 'top' utility to monitor the interrupts, but the only apps I found were either deprecated, or missed some cool features. So, I ended up writing my own tool to monitor the file /proc/interrupts. It's available a this address: https://gitorious.org/elboulangero/itop As its name indicates, it behaves pretty much like top, but for interrupts. It's quite a simple thing, that I tried to enhance a bit with some cool features: + refresh period can be specified. + two display modes: display interrupts for every CPU, or only a sum of all CPU. + display every interrupt (sorted like /proc/interrupts), or only active interrupts (sorted by activity). + in case the number of interrupts changes during the execution of itop (due to a rmmod/modprobe), it's handled without any fuss. + command-line options are also available as hotkeys for convenience. + at last, the program display a summary on exit. The idea is that this summary could be copied/pasted in emails to help debugging. If anyone is interested, feel free to try and comment ! Cheers

11 years, 3 months

Support for Steinberg UR22 (Yamaha USB chipset 0499:1509)?

by cullinan＠rocketmail.com

Hi, there! I just got a Steinberg UR22 USB<->Audio / MIDI interface for my semi-prof. DJ work. I am working on Linux (only), but wanted to give this new product a chance. Well, it's basically a nice device but with an Yamaha chipset in it which seem unfortunately not supported from the latest (3.7.9) linux kernel(s). My questions are: - How likely is it to get this device fully supported on linux? - What needs to be done to get this device fully supported? I am an electrical engineer and did some linux device driver development in the past on some DMA stuff, but I am quite new to linux audio. But I am willing to help somewhere... I could try to reverse-engineer the USB stuff on Windows with the usbmon/usbsnoop/libusb things... But if it's too much work, to get it working, I could also just decide to send it back to Steinberg and thank them for not supporting Linux with their products. The USB information I could get is: $ aplay -l doesn't list that device $ lsusb ... Bus 002 Device 016: ID 0499:1509 Yamaha Corp. ... (See the more comprehensive $ lsusb -v below...) Related USB devices are: 0499:1501 Yamaha 0499:1507 Yamaha THR10 0499:1509 Yamaha Steinberg UR22 (what I am talking about) 0499:150c Yamaha THR10C Related search resuls are: Getting a Steinberg CI1 USB audio interface to work http://ubuntuforums.org/showthread.php?t=1696336 Yamaha THR10 amp / USB2.0 audio interface http://linux-audio.4202.n7.nabble.com/Yamaha-THR10-amp-USB2-0-audio-interfa… Thank you, Clemens (different one as in last link) -----8<----- $ lsusb -v -d 0499:1509 Bus 002 Device 014: ID 0499:1509 Yamaha Corp. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 2.00 bDeviceClass 255 Vendor Specific Class bDeviceSubClass 0 bDeviceProtocol 255 bMaxPacketSize0 64 idVendor 0x0499 Yamaha Corp. idProduct 0x1509 bcdDevice 1.00 iManufacturer 1 Yamaha Corporation iProduct 2 Steinberg UR22 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 442 bNumInterfaces 5 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xc0 Self Powered MaxPower 500mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 1 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 0a 24 01 00 01 34 00 02 01 02 ** UNRECOGNIZED: 0c 24 02 01 01 01 00 02 03 00 00 00 ** UNRECOGNIZED: 09 24 03 02 01 03 00 01 00 ** UNRECOGNIZED: 0c 24 02 03 03 06 00 02 03 00 00 00 ** UNRECOGNIZED: 09 24 03 04 01 01 00 03 00 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 07 24 01 01 01 01 00 ** UNRECOGNIZED: 0e 24 02 01 02 03 18 02 44 ac 00 80 bb 00 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x07 EP 7 OUT bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x002a 1x 42 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 2 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 07 24 01 01 01 01 00 ** UNRECOGNIZED: 0e 24 02 01 02 03 18 02 88 58 01 00 77 01 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x07 EP 7 OUT bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x004e 1x 78 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 1 bAlternateSetting 3 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 07 24 01 01 01 01 00 ** UNRECOGNIZED: 0e 24 02 01 02 03 18 02 10 b1 02 00 ee 02 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x07 EP 7 OUT bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x0096 1x 150 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 0 bNumEndpoints 0 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 1 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 07 24 01 04 01 01 00 ** UNRECOGNIZED: 0e 24 02 01 02 03 18 02 44 ac 00 80 bb 00 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x86 EP 6 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x002a 1x 42 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 2 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 07 24 01 04 01 01 00 ** UNRECOGNIZED: 0e 24 02 01 02 03 18 02 88 58 01 00 77 01 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x86 EP 6 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x004e 1x 78 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 2 bAlternateSetting 3 bNumEndpoints 1 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 2 bInterfaceProtocol 0 iInterface 0 ** UNRECOGNIZED: 07 24 01 04 01 01 00 ** UNRECOGNIZED: 0e 24 02 01 02 03 18 02 10 b1 02 00 ee 02 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x86 EP 6 IN bmAttributes 5 Transfer Type Isochronous Synch Type Asynchronous Usage Type Data wMaxPacketSize 0x0096 1x 150 bytes bInterval 1 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 3 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 3 bInterfaceProtocol 255 iInterface 0 ** UNRECOGNIZED: 07 24 01 00 01 24 00 ** UNRECOGNIZED: 06 24 02 02 01 00 ** UNRECOGNIZED: 09 24 03 02 01 01 01 01 00 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x01 EP 1 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 4 bAlternateSetting 0 bNumEndpoints 2 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 255 Vendor Specific Subclass bInterfaceProtocol 255 Vendor Specific Protocol iInterface 0 ** UNRECOGNIZED: 07 24 01 00 01 24 00 ** UNRECOGNIZED: 06 24 02 02 01 00 ** UNRECOGNIZED: 09 24 03 02 01 01 01 01 00 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x03 EP 3 OUT bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x84 EP 4 IN bmAttributes 2 Transfer Type Bulk Synch Type None Usage Type Data wMaxPacketSize 0x0200 1x 512 bytes bInterval 0 Device Qualifier (for other device speed): bLength 10 bDescriptorType 6 bcdUSB 2.00 bDeviceClass 0 (Defined at Interface level) bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 bNumConfigurations 1 Device Status: 0x0000 (Bus Powered) -----8<-----

11 years, 3 months

[ANN] - MOD Pitch Shifter

by Gianfranco Ceccolini

Hi everybody We are very happy to announce the MOD Pitch Shifter https://github.com/portalmod/mod-pitchshifter.git After some unsuccessfull time looking for a nice pitch shifter to offer in the MOD Cloud we decided to make one ourselves. Kudos for Andre Coutinho who did most of the coding. We tried VocProc and Rubberband but none gave satisfactory results, the first being too complicated and the latter yelding too much latency. It is very simple to use - a simple semitones shift and a quality lever - and sounds pretty nice. The team is working on it to make it even nicer but this first version sounds pretty good already. It uses the fftw3 lib which is pretty common and can be installed via the main linux repositories (ubuntu, debian, arch, etc) Hope you all enjoy Kind Regards Gianfranco The MOD Team

12 years

vu-meter DSP

by Robin Gareus

Hi Fons, Would you mind explaining how the vumeterdsp.cc from jmeters works? In particular how you arrive at the filter-constant: _w = 11.1f / fsamp; With the DSP using a 2nd order low-pass filter, and since VU should have an integration-time of 300ms, I'd have though it should rather be: _w = (1.0 - exp(-2.0 * M_PI / 0.3 / fsamp)) / 2.0; for large values this can be approximated by _w = 10.468 / fsamp; What am I missing? -=-=-=- I suppose the gain is arbitrary, seeing as it is mapped to a GUI element without any numeric display, anyway. But is there something special about: _g = 1.5f * 1.571f; 1.5 * M_PI/2 ?? ie 90 degree deflection? But why the 1.5? -=-=-=- The context of all this is re-using your code to implement a VU meter in Ardour3. For reference, the source-code is at https://github.com/Ardour/ardour/blob/master/libs/ardour/vumeterdsp.cc Some experienced beta-testers contested the ballistics of the meter and I'm trying to get to the bottom of it... Since this might be of general interest, I'm CCing LAD. thanks in advance, robin

12 years

OpenAV Fabla

by Harry van Haaren

Hi, Its my pleasure to announce the release of Fabla! After 8 days we have reached the target donation amount, many thanks to all those who contributed! Available here: http://openavproductions.com/fabla Cheers! -Harry

12 years

Guitarix 0.28.0 released

by Andreas Degert

The Guitarix developers proudly present Guitarix release 0.28.0 "magic chainsaw trick" *) Yes, we took a chainsaw, cut through the chest of Guitarix, and... it's still alive. But now it's also 2 pieces. You can start it (headless) on an embedded ARM system. You can start it on your laptop and connect the user interface the the headless instance. You can even tap on your smartphone and control Guitarix with the web browser (or just use the tuner). For the uninitiated, Guitarix is a tube amplifier simulation for jack, with effect modules and an additional stereo effect chain. Please refer to our project page for more information: http://guitarix.sourceforge.net/ Download Site: http://sourceforge.net/projects/guitarix/ Forum: http://guitarix.sourceforge.net/forum/ Embedded Guitarix Prototype: http://sourceforge.net/apps/mediawiki/guitarix/index.php?title=Guitarix_Emb… Please consider visiting our forum or leaving a message on guitarix-developer(a)lists.sourceforge.net if you plan to work with embedded Guitarix. List of changes: * new french translation contributed by Bajo * new MultiBandCompressor contributed by kokoko3k * new include BestPlugins IR-Packs I-III by David Fau Casquel * new DigitalDelay Effect module * the Guitarix LV2 plugins are now in the default build (but you can configure the build with --no-lv2) * Optimizations for embedded systems / ARM processors with NEON * --faust-vectorize-float, --convolver-ffmpeg * Guitarix headless mode for embedded systems (no X11 / user Interface) * network socket based service for controlling / connecting a user interface * service announcement via Avahi, if available * command line options --rpchost, --rpcport, --nogui * the service can be started in addition to the "local" user interface * Guitarix can now be used as a user interface connecting to a remote instance * no configuration needed if Avahi is available * command line options --onlygui, --rpchost, --rpcport * multiple user interface clients can be started (the displays keep synchronized) * Browser-based user interface (javascript code) * cross platform * usable on small devices like smartphones, and in conjunction with an embedded device * some features still missing (no MIDI controller connections, no presets for single effect units, no polished appearance) * small additional server needed (included), to translate between the socket based interface and WebSockets, which is what (modern) browsers understand * only recent browsers supported, testers needed * released in a separate tarfile *) http://www.youtube.com/watch?v=GPTHdwqG9rw

12 years

[ANN] Qtractor 0.5.10 - The Kilo Papa is out

by Rui Nuno Capela

Nothing much to say... but anything goes, as long it goes before the proverbial midsummer meltdown... whatever:) Qtractor 0.5.10 (kilo papa) is out! Release highlights: * Edit/Insert, Remove range options (NEW) * LV2 Dyn-manifest support (NEW) * Time, frames, BBT display option in-place menu (NEW) * Audio export track automation (FIX) * Clip/event selection clear/reset (FIX) Website: http://qtractor.sourceforge.net Project page: http://sourceforge.net/projects/qtractor Downloads: http://sourceforge.net/projects/qtractor/files - source tarball: http://downloads.sourceforge.net/qtractor/qtractor-0.5.10.tar.gz - source package (openSUSE 12.3): http://downloads.sourceforge.net/qtractor/qtractor-0.5.10-7.rncbc.suse123.s… - binary packages (openSUSE 12.3): http://downloads.sourceforge.net/qtractor/qtractor-0.5.10-7.rncbc.suse123.i… http://downloads.sourceforge.net/qtractor/qtractor-0.5.10-7.rncbc.suse123.x… - quick start guide & user manual: http://downloads.sourceforge.net/qtractor/qtractor-0.5.x-user-manual.pdf Weblog (upstream support): http://www.rncbc.org License: Qtractor is free, open-source software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. Change-log: - Default drum-key note names are now properly showing on MIDI tracks that are assigned to known drum/percussive instrument patches (eg. SoundFont 2 (.sf2) bank 128). - Time display format (frames, clock-time or BBT) may now be changed from the context-menu on any time entry spin-box. - LV2 plugin support is now tightly tied to liblilv; the same tie applies to LV2 plugin UI support and libsuil and vice-versa. - Mixer buses racks (ie. left/input and right/output panes) are now both kept fixed-width when whole mixer window is resized. - Unconditional LV2 Dyn(amic)-manifest support has been added. - Main track-view Edit/Insert,Remove/Range dialog is now being introduced with optional applicability to Clips, Loop, Punch in/out, Automation, Tempo-map and/or Markers. - New range removal editing tool, split/moving clips backward at the specified edit-head/tail interval (Edit/Remove/Range, Track Range)--by Tuomas Airaksinen, thanks. - Andy Fitzsimon's original icon from opencliparts.org makes it through as the default standard scalable format (SVG). - Automation's back in effect on Track/Export Tracks.../Audio. - Reversed shift/ctrl keyboard modifier roles on middle-button clicking over the main track and MIDI clip editor views (aka. piano-roll) in regression to original old semantics. - Color selection actions now have a brand new palette icon. - Make sure main track-view and MIDI clip editor selection is only cleared on specific discrete commands. - Try keeping the original session file in most recent files menu list, despite current version auto-incremental backup mode is in effect. - Fixed non-zero clip offsets upon tempo/time-scale changes. - Some sympathy to extreme dark color (read black) schemes is now indulged on empty backgrounds. See also: http://www.rncbc.org/drupal/node/680 Enjoy && have (lots of) fun. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

12 years

Announcing praxislive.org

by Neil C Smith

Hi All, I finally got around to giving Praxis LIVE its own home on the web this week. There's a lot more to come in the near future in terms of help and resources, but this should hopefully give a better overview of what the project's all about. www.praxislive.org Praxis LIVE is an open-source, graphical environment for rapid development of intermedia performance tools, projections and interactive spaces. This replaces and enhances the somewhat outdated information on the Google Code site. Downloads and code are still hosted there, though I'll be looking to host downloads elsewhere in the near future now Google has deprecated this. Thoughts and / or contributions to the further development of the project and its online resources very much appreciated. Thanks to whoever mentioned Praxis LIVE on the open-source musician podcast last month - your slight confusion over what it was for was one of a number of factors that prompted the development of this website! :-) Best wishes, Neil -- Neil C Smith Artist : Technologist : Adviser http://neilcsmith.net Praxis LIVE - open-source intermedia development - www.praxislive.org Digital Prisoners - interactive spaces and projections - www.digitalprisoners.co.uk OpenEye - the web, managed - www.openeye.info

12 years

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Linux-audio-dev July 2013