Linux-audio-dev

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3 participants
7448 discussions

by Nils

I try to make some photos and twitter here and there about the linux audio conference 2014. Hashtag is #lac2014 Follow me or write your own! https://twitter.com/NilsGey Have Fun live or with the stream! Nils

10 years, 5 months

[ANN] Qtractor 0.6.1 & Vee One Suite 0.4.2 - A pre-LAC beta release frenzy!

by Rui Nuno Capela

Howdy! As a pre-LAC release frenzy, Qtractor 0.6.1 (bitsy sweet beta) is out! the change-log for this release are mainly fixes: - New user preference option added as View/Options.../Display/Transport/Hold auto-scrolling (follow play-head) on edits (after requests by Holger Marzen and Louigi Verona, thanks). - All color chooser dialogs were missing proper titles. - Audio peak file re-generation and clean-up has been hopefully fixed and cache optimized (re. drawing audio clip waveforms). - Fixed initial session snap-per-beat setting on main toolbar. - Clip/Export...'ed files are now made persistent, no questions asked (after a ticket by Oliver Kester, thanks). - Portuguese (pt) translation added (by Esteban Viveros, thanks). The Vee One Suite of old-school also gets an interesting update. changes for the third proto-beta release are: - Badly named 'Noise' wave-shape oscillators get their band-limited treat option and re-labeled as 'Rand' (synthv1 only); also a brand new wave-shape 'Noise' is then introduced (now for real :)). - New user preference option, cf. Help/Use native dialogs. - An anti-denormal regression applied to the Phaser fx stage (affecting early proto-beta >= 0.4.0). all still available in dual form, as usual: - a pure stand-alone JACK client with JACK-session, NSM (Non Session management) and both JACK MIDI and ALSA MIDI input support; - a LV2 instrument plugin. Remember that both Qtractor and the Vee One Suite are free and open-source Linux Audio software, distributed under the terms of the GNU General Public License (GPL) version 2 or later. See you all on LAC2014@ZKM-Karlsruhe! http://lac.linuxaudio.org/2014/ See also: http://www.rncbc.org/drupal/node/778 And here goes the dirty details: * Qtractor - an audio/MIDI multi-track sequencer * Qtractor 0.6.1 (bitsy sweet beta) is out! Qtractor is an audio/MIDI multi-track sequencer application written in C++ with the Qt4 framework [1]. 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://download.sourceforge.net/qtractor/qtractor-0.6.1.tar.gz - source package: http://download.sourceforge.net/qtractor/qtractor-0.6.1-11.rncbc.suse131.sr… - binary packages: http://download.sourceforge.net/qtractor/qtractor-0.6.1-11.rncbc.suse131.i5… http://download.sourceforge.net/qtractor/qtractor-0.6.1-11.rncbc.suse131.x8… - quick start guide & user manual (outdated): http://download.sourceforge.net/qtractor/qtractor-0.5.x-user-manual.pdf help wanted! Qtractor Wiki ;) http://sourceforge.net/p/qtractor/wiki/ * synthv1 - an old-school polyphonic synthesizer * synthv1 0.4.2 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://download.sourceforge.net/synthv1/synthv1-0.4.2.tar.gz - source package: http://download.sourceforge.net/synthv1synthv1-0.4.2-16.rncbc.suse131.src.r… - binary packages: http://download.sourceforge.net/synthv1synthv1-0.4.2-16.rncbc.suse131.i586.… http://download.sourceforge.net/synthv1synthv1-0.4.2-16.rncbc.suse131.x86_8… * samplv1 - an old-school polyphonic sampler * samplv1 0.4.2 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://download.sourceforge.net/samplv1/samplv1-0.4.2.tar.gz - source package: http://download.sourceforge.net/samplv1/samplv1-0.4.2-16.rncbc.suse131.src.… - binary packages: http://download.sourceforge.net/samplv1/samplv1-0.4.2-16.rncbc.suse131.i586… http://download.sourceforge.net/samplv1/samplv1-0.4.2-16.rncbc.suse131.x86_… * drumkv1 - an old-school drum-kit sampler * drumkv1 0.4.2 is out! drumkv1 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/drumkv1-0.4.2.tar.gz - source package: http://download.sourceforge.net/drumkv1/drumkv1-0.4.2-12.rncbc.suse131.src.… - binary packages: http://download.sourceforge.net/drumkv1/drumkv1-0.4.2-12.rncbc.suse131.i586… http://download.sourceforge.net/drumkv1/drumkv1-0.4.1-12.rncbc.suse131.x86_… Enjoy && yet again, have fun. -- rncbc aka Rui Nuno Capela rncbc(a)rncbc.org

10 years, 5 months

Hydrogen - hihat foot pedal control

by Aurélien Leblond

Hello Sebastian, A few weeks ago when discussed on the LAD a few enhancements for Hydrogen, one of them was to be able to switch between open, half-open and closed hihat samples when playing with the hihat foot control on an E-Drum. In this fork https://github.com/blablack/hydrogen I worked out the basic backend solution: - instruments can be set to be part of a hihat - if they are, they have a range associated that say to what level of foot control pressure they react - in the midi_input class, when a 'note on' is received, the method will check if the instrument is a hihat, check the foot pressure and change the note played to the one of the right hihat instrument if needed I still need to modify the GUI (at the moment I need to change the xml of the drumkit to be able to set that up), but if you could have a look at this to give me some feedback that would be great. Thanks in advance, Aurélien

10 years, 5 months

DAW extra feature proposal: reversed clips, clip status info display

by Zlobin Nikita

There is one usage case, i can call - reversing recorded piano and some other instruments. One case, when sequencer and even instrument settings are not last step before mastering. I'm not expert and at all badly aware of existing music to mention examples, but i know at least one - in Black Mesa game - some soundtracks, marked as "mesa remix". I don't see it bad to mention such stuff there, since it is done completely by fans, no matter with what resources and software. Additionally, in gui clips may display inline status, with indicators for direction and all other clip-individual info, such as speed (probably, that's all - don't know, what other indicators are good to have there).

10 years, 5 months

ALSA frustration

by Fons Adriaensen

For the N-th time I've set aside a day to try and read some of the ALSA documentation. For the N-th time I've completely lost my way in a web consisting of * The complete lack of any documentation that explains the concepts, the big picture, and the terminology. * Completely useless docs, of the form: function xxx_set_yyy (parm_zzz) sets the yyy of xxx to zzz. or similar, in other words something generated automagically and completely uninformative and redundant. In particalur if it's impossible to find out what yyy is supposed to be or do in the first place. * Uncomprehensible English. * When trying to learn something from actual source code or examples, layer upon layer of syntactic sugar making it virtually impossible to understand what's going on. All this more than ten years after ALSA was announced. I *do* understand those hardware manufactureres who just refuse to try and write an ALSA driver. In this case my very humble endeavour was just to find out if or not it would be possible to create something similar to the alsa_jack plugin that would actually present itself as a sound card, so that (badly written) apps would be prepared to use it. If someone knows the answer to that question and can also explain it I'll commend him/her in my prayers. -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow)

10 years, 5 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, 5 months

[LAA] Guitarix 0.29.0 released

by hermann meyer

The Guitarix developers proudly present Guitarix release 0.29.0 For the uninitiated, Guitarix is a tube amplifier simulation for jack, with effect modules and an additional stereo effect chain. Among with a couple changes in the source and some bug-fixes, this relase comes with a couple of new plugs (gx & LV2), were most of them comes from our new Development Member Fedor Uporov. The Simulation plugs been developed with the new Analog Circuit Simulation Toolkit by Andreas Degert. new plugs: * Record Mono/Stereo (gx) * JCM800PRE (Preamp simulation) (gx) * GCB_95 (WahWah simulation) (gx) * Duck Delay Mono/Stereo (gx / LV2) * Reverse Delay (gx) * Graphic EQ (gx / LV2) * Ring Modulator Mono/Stereo (gx) * Plate Reverb (gx) * Panorama Enhancer (gx) * Bass Enhancer (gx) * BarkGraphicEQ (24band LV2) 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/ Please consider visiting our forum or leaving a message on guitarix-developer(a)lists.sourceforge.net <mailto:guitarix-developer@lists.sourceforge.net>

10 years, 5 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<-----

10 years, 5 months

ALSA docs

by Fons Adriaensen

Hello all, anyone knows where to find a state diagram for PCM devices ? What I want to find out in particular is - if a device supports the pcm_resume() function, and it returns 0, is a pcm_start() required or not (it is if pcm_resume() is not supported) ? Ciao, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow)

10 years, 5 months

Transcribing piano rolls with Python

by Joel Roth

This guy isn't the only one to do it, but he's written it up nicely, and uses Lilypond and Frescobaldi for output. http://zulko.github.io/blog/2014/02/12/transcribing-piano-rolls/

10 years, 5 months

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Linux-audio-dev