Linux-audio-dev December 2013

linux-audio-dev@lists.linuxaudio.org

31 participants
23 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)

9 years, 7 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

9 years, 11 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

10 years

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<-----

10 years

Calling all developers

by Gabbe Nord

Hey everyone! In an effort to eventually bridge the gap between users and developers, and specifically explore the contributions users that aren't programmers can make to free and open source software, I have designed a short survey for active developers. More information and the survey itself is available on http://www.zthmusic.com/developer-survey/. I'd greatly appreciate any participation from developers. As mentioned on the page, I will compile the results of this survey into an infographic. I will also eventually publish all of the results freely to anyone, so everyone can have a look at the data. I hope this survey can give some good data, that can spark some good discussion on how we can further integrate users and developers, and make more use of the great community we have! Cheers and merry christmas everyone, Gabriel/zth

10 years, 3 months

io GNU/Linux LiveDVD/USB ... 64-bit iso up :)

by MK aka El Doctor

Hi all :) Uploaded a new iso of "io GNU/Linux", a LiveDVD/USB focused on multimedia (Debian based). Kernel 3.12.6-amd64, e18 as desktop environment, Jack2 as default sound server and more nice stuff ;) -> http://manu.kebab.free.fr/io/releases/io-live-hybrid-3.12.6-amd64--2013.12.… A quick (and dirty) screencast here: -> https://www.youtube.com/watch?v=9KKsQfKbvGg For more infos, screenshots gallery, etc... Please visit: -> http://manu.kebab.free.fr/iognulinux.html -> https://sourceforge.net/projects/io-gnu-linux/ Enjoy & Best wishes for 2014 MK

10 years, 3 months

[ANN] A fifth of a Jubilee with a late Mike November release

by Rui Nuno Capela

Happy year-ending to y'all. Not a fiscal report I'm afraid but the biggest load of Q-stuff released ever ;) Enjoy! * QjackCtl - A JACK Audio Connection Kit Qt GUI Interface QjackCtl 0.3.11 is out! QjackCtl is a simple Qt application to control the JACK sound server, for the Linux Audio infrastructure. website: http://qjackctl.sourceforge.net downloads: http://sourceforge.net/projects/qjackctl/files - source tarball: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.11.tar.gz - source package: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.11-20.rncbc.suse123.… - binary packages: http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.11-20.rncbc.suse123.… http://downloads.sourceforge.net/qjackctl/qjackctl-0.3.11-20.rncbc.suse123.… * Qsynth - A FluidSynth Qt GUI Interface Qsynth 0.3.8 is out. Qsynth is a FluidSynth GUI front-end application written in C++ around the Qt4 toolkit using Qt Designer. website: http://qsynth.sourceforge.net downloads: http://sourceforge.net/projects/qsynth/files - source tarball: http://downloads.sourceforge.net/qsynth/qsynth-0.3.8.tar.gz - source package: http://downloads.sourceforge.net/qsynth/qsynth-0.3.8-4.rncbc.suse123.src.rpm - binary packages: http://downloads.sourceforge.net/qsynth/qsynth-0.3.8-4.rncbc.suse123.i586.r… http://downloads.sourceforge.net/qsynth/qsynth-0.3.8-4.rncbc.suse123.x86_84… * Qsampler - A fluidsynth Qt GUI Interface Qsampler 0.2.3 is (finally) out! Qsampler is a LinuxSampler GUI front-end application written in C++ around the Qt4 toolkit using Qt Designer. website: http://qsampler.sourceforge.net downloads: http://sourceforge.net/projects/qsampler/files - source tarball: http://downloads.sourceforge.net/qsampler/qsampler-0.2.3.tar.gz - source package: http://downloads.sourceforge.net/qsampler/qsampler-0.2.3-6.rncbc.suse123.sr… - binary packages: http://downloads.sourceforge.net/qsampler/qsampler-0.2.3-6.rncbc.suse123.i5… http://downloads.sourceforge.net/qsampler/qsampler-0.2.3-6.rncbc.suse123.x8… * QXGEdit - A Qt XG Editor QXGEdit 0.1.2 is out! QXGEdit is a Qt GUI for editing MIDI System Exclusive files for XG devices (eg. Yamaha DB50XG). website: http://qxgedit.sourceforge.net downloads: http://sourceforge.net/projects/qxgedit/files - source tarball: http://downloads.sourceforge.net/qxgedit/qxgedit-0.1.2.tar.gz - source package: http://downloads.sourceforge.net/qxgedit/qxgedit-0.1.2-2.rncbc.suse123.src.… - binary packages: http://downloads.sourceforge.net/qxgedit/qxgedit-0.1.2-2.rncbc.suse123.i586… http://downloads.sourceforge.net/qxgedit/qxgedit-0.1.2-2.rncbc.suse123.x86_… * QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast QmidiCtl 0.1.1 is out! QmidiCtl is a MIDI remote controller application that sends MIDI data over the network, using UDP/IP multicast. Inspired by multimidicast and designed to be compatible with ipMIDI for Windows. website: http://qmidictl.sourceforge.net downloads: http://sourceforge.net/projects/qmidictl/files - source tarball: http://downloads.sourceforge.net/qmidictl/qmidictl-0.1.1.tar.gz - source package: http://downloads.sourceforge.net/qmidictl/qmidictl-0.1.1-2.rncbc.suse123.sr… - binary packages: http://downloads.sourceforge.net/qmidictl/qmidictl-0.1.1-2.rncbc.suse123.i5… http://downloads.sourceforge.net/qmidictl/qmidictl-0.1.1-2.rncbc.suse123.x8… * QmidiNet - A MIDI Network Gateway via UDP/IP Multicast QmidiNet 0.1.3 is out! QmidiNet is a MIDI network gateway application that sends and receives MIDI data (ALSA MIDI Sequencer and/or JACK MIDI) over the network, using UDP/IP multicast. Inspired by multimidicast and designed to be compatible with ipMIDI for Windows. website: http://qmidinet.sourceforge.net downloads: http://sourceforge.net/projects/qmidinet/files - source tarball: http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.3.tar.gz - source package: http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.3-2.rncbc.suse123.sr… - binary packages: http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.3-2.rncbc.suse123.i5… http://downloads.sourceforge.net/qmidinet/qmidinet-0.1.3-2.rncbc.suse123.x8… the Vee One Suite gets anorther bump, * synthv1 - an old-school polyphonic synthesizer synthv1 0.3.6 is out! 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://downloads.sourceforge.net/synthv1/synthv1-0.3.6.tar.gz - source package: http://downloads.sourceforge.net/synthv1/synthv1-0.3.6-13.rncbc.suse123.src… - binary packages: http://downloads.sourceforge.net/synthv1/synthv1-0.3.6-13.rncbc.suse123.i58… http://downloads.sourceforge.net/synthv1/synthv1-0.3.6-13.rncbc.suse123.x86… * samplv1 - an old-school polyphonic synthesizer samplv1 0.3.6 is out! 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://downloads.sourceforge.net/samplv1/samplv1-0.3.6.tar.gz - source package: http://downloads.sourceforge.net/samplv1/samplv1-0.3.6-13.rncbc.suse123.src… - binary packages: http://downloads.sourceforge.net/samplv1/samplv1-0.3.6-13.rncbc.suse123.i58… http://downloads.sourceforge.net/samplv1/samplv1-0.3.6-13.rncbc.suse123.x86… * drumkv1 - an old-school polyphonic synthesizer drumkv1 0.3.6 is out! drumkv1 is an old-school polyphonic 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://downloads.sourceforge.net/drumkv1/drumkv1-0.3.6.tar.gz - source package: http://downloads.sourceforge.net/drumkv1/drumkv1-0.3.6-9.rncbc.suse123.src.… - binary packages: http://downloads.sourceforge.net/drumkv1/drumkv1-0.3.6-9.rncbc.suse123.i586… http://downloads.sourceforge.net/drumkv1/drumkv1-0.3.6-9.rncbc.suse123.x86_… last buit not least, the late Mike November closing the TYOQA era, * Qtractor - An Audio/MIDI multi-track sequencer Qtractor 0.5.12 (mike november) is out! Qtractor is an audio/MIDI multi-track sequencer application written in C++ with the Qt4 framework. Target platform is Linux, where the Jack Audio Connection Kit (JACK) for audio and the Advanced Linux Sound Architecture (ALSA) for MIDI are the main infrastructures to evolve as a fairly-featured Linux desktop audio workstation GUI, specially dedicated to the personal home-studio. website: http://qtractor.sourceforge.net downloads: http://sourceforge.net/projects/qtractor/files - source tarball: http://downloads.sourceforge.net/qtractor/qtractor-0.5.12.tar.gz - source package: http://downloads.sourceforge.net/qtractor/qtractor-0.5.12-8.rncbc.suse123.s… - binary packages: http://downloads.sourceforge.net/qtractor/qtractor-0.5.12-8.rncbc.suse123.i… http://downloads.sourceforge.net/qtractor/qtractor-0.5.12-8.rncbc.suse123.x… Enjoy && have a very happy new year! -- rncbc aka. Rui Nuno Capela

10 years, 3 months

Re: [LAD] Get status of ladspa/lv2 parameters

by contact＠e-rouge.net

Le 2013-12-23 15:50, contact(a)e-rouge.net a écrit : > Cadence/Non-mixer... any effect host, basically. > > Le 2013-12-23 15:48, Raphaël Mouneyres a écrit : >> hi, >> this highly depends on the software from which you want to have the >> information, and if it already implements a way for you to grab the >> values. >> Can you specify the softwares you want to take info from ? >> >> Raphaël >> >> 2013/12/23, contact(a)e-rouge.net <contact(a)e-rouge.net>: >>> Hello ! >>> >>> I'm currently trying to make an arduino controller that'd allow me to >>> control easily effects and such with only a few rotary encoders, >>> without >>> the tedious mapping. >>> >>> So, basically, I need to get the parameters FROM the programs (when >>> selected or sweeping though them thanks to a button) and either >>> change >>> the CC/OSC accordingly on the midi/osc controller or use mididings >>> (or >>> equivalent) to map things properly. >>> >>> Simply put, is there a way to get a list of hosts, a list of effects >>> within host, a list of parameters within effect, and the value of a >>> given parameter ? Oh. And the names or any kind of ID would be nice. >>> >>> (Male and Falktx, I think you can help me with this...) >>> >>> Thanks a lot for you help ! >>> >>> Tumulte >>> >>> >>> _______________________________________________ >>> Linux-audio-dev mailing list >>> Linux-audio-dev(a)lists.linuxaudio.org >>> http://lists.linuxaudio.org/listinfo/linux-audio-dev >>>

10 years, 4 months

Get status of ladspa/lv2 parameters

by contact＠e-rouge.net

Hello ! I'm currently trying to make an arduino controller that'd allow me to control easily effects and such with only a few rotary encoders, without the tedious mapping. So, basically, I need to get the parameters FROM the programs (when selected or sweeping though them thanks to a button) and either change the CC/OSC accordingly on the midi/osc controller or use mididings (or equivalent) to map things properly. Simply put, is there a way to get a list of hosts, a list of effects within host, a list of parameters within effect, and the value of a given parameter ? Oh. And the names or any kind of ID would be nice. (Male and Falktx, I think you can help me with this...) Thanks a lot for you help ! Tumulte

10 years, 4 months

Usb Audio Driver

by Lucas Takejame

Hello LAD, I'm working in company which is developing a guitar pedal board which runs Linux (arch) and my task now is to make the kernel's usb audio driver more appropriate to our sound card. I'm kinda lost in this since i have a brief knowledge on usb protocol so I was hoping that you could give me some directions on how can I optimize the driver latency wise, any tips? Att, Lucas

10 years, 4 months

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Linux-audio-dev December 2013