Linux-audio-dev May 2015

linux-audio-dev@lists.linuxaudio.org

22 participants
23 discussions

by Tim Goetze

http://quitte.de/dsp/caps.html The latest release of the caps audio plugin suite contains a number of bug fixes and improvements as well as changes intended to make it more suitable for low-power systems. http://quitte.de/dsp/caps.html#CHANGES Most notably, support for a variety of little-used features has been dropped, reducing the binary size by roughly a third. There's also a new plugin implementing simplistic linear emulation of several guitar amplifier loudspeaker cabinets with reduced computational complexity: http://quitte.de/dsp/caps.html#CabinetIII The compressor plugins now report current gain reduction: http://quitte.de/dsp/caps.html#Compress http://quitte.de/dsp/caps_0.9.24.tar.bz2 Cheers, Tim

4 years, 7 months

Call for testing: new ALSA driver for Digi 002/003 family

by Takashi Sakamoto

Hi all, This is a call-for-testing of my new ALSA driver for Digidesign 002/003 family. If you have these devices, would you please test the driver with your devices and report your experience about it. Especially, I want you to test MIDI port for machine control, because developers have no 'console' models, just tested with 'rack' models. When installing and testing, please follow this instructions: https://github.com/takaswie/snd-firewire-improve Patchset was already posted to alsa-devel and confirmed to playback/capture PCM samples/MIDI messages by ALSA applications. [alsa-devel] [RFC v2][PATCH 00/11] digi00x: new driver for Digidesign 002/003 family http://mailman.alsa-project.org/pipermail/alsa-devel/2015-March/089708.html Several issues are still remained: * The port for MIDI machine control message is not tested yet, because 002/003 console model are required. * When allocates 2 or more channel numbers for the device, after 15 to 20 seconds from playbacking, any PCM samples causes noisy sound. Then, all of LED on the front panel light. The streaming still continues correctly. * The actual effects of external clock source is not clear. When set the clock source is somewhat external, even if stopping the clock source, the device continues to sound PCM samples against my expectation. * The meaning of asynchronous messages is unknown. This patchset adds a functionality to receive it in userspace. You can test it with updated libhinawa sample script. https://github.com/takaswie/libhinawa In my plan, this patchset will proposed for Linux 4.2. But these issues need to be clear till the merge-window. Regards Takashi Sakamoto

7 years, 11 months

A couple of new plugins

by Hermann Meyer

been pushed to the guitarix git repository. Those are simulations of the following pedals: Fuzz Face JH1 Fuzz Face Fuller Mods Fuzz Face Roger Mayer Foxey Lady Colorsound Tonebender Sustainer+Muff (Big Muff Pi) Screamig Bird Hornet High Frequency Brightener LPB-1 Booster Hogs Foot They are generated from schematic files, with our Ampsim Toolkit. http://sourceforge.net/p/guitarix/blog/2015/03/j-hendrix-fuzz-face/ Schematic files (gschem) been included in the tools directory. regards hermann

7 years, 11 months

JACK and vanilla 3.19.2 startup issue

by Harry van Haaren

Hi All, As root, starting JACK1 0.124.1 on an almost totally vanilla 3.19.2-1-ARCH kernel fails. Output of kernel with JACK1 issue is pasted below[1]. The same system works fine with the 3.18.9-rt5-1-rt kernel. Running "groups" tells me there is no group other than "root", so JACK seems to misinterpret that there is an audio group on the "broken" kernel. Any suggestions as to what's going on? Thanks, -Harry PS: I'm aware of the reasons to not run JACK as the root user or login as root for daily use. [1] Output while running "broken" kernel: [root@audio ~]# jackd -ddummy jackd 0.124.1 Copyright 2001-2009 Paul Davis, Stephane Letz, Jack O'Quinn, Torben Hohn and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details JACK is running in realtime mode, but you are not allowed to use realtime scheduling. Your system has an audio group, but you are not a member of it. Please add yourself to the audio group by executing (as root): usermod -a -G audio (null) After applying these changes, please re-login in order for them to take effect. You don't appear to have a sane system configuration. It is very likely that you encounter xruns. Please apply all the above mentioned changes and start jack again!

7 years, 12 months

question re: waf cprogram

by Dave Phillips

Greetings, The error and repair attached below come from my attempts to build gmidimonitor on Fedora 19. As you can see, gcc is not what's required to complete the build, but waf's cprogram calls gcc, not g++. Alas, I can't find much information about the cprogram directive, and I'm always out of my depths when C++ is involved. Before anyone decides it's an "old code" issue, be advised that I have to perform the same operation on the latest git pulls of xjadeo. I'd like to know if there's a global solution, or at least a compile-time export I can use to resolve the problem. Fedora 19 x86_64, GCC 4.8.3 TIA! Best, dp [dlphilp@localhost gmidimonitor-3.6]$ ./waf Waf: Entering directory `/home/dlphilp/src/gmidimonitor-3.6/build' [10/10] cprogram: build/main.c.0.o build/about.c.0.o build/path.c.0.o build/gm.c.0.o build/log.c.0.o build/memory_atomic.c.0.o build/sysex.c.0.o build/jack.c.0.o build/alsa.c.0.o -> build/gmidimonitor /usr/lib/gcc/x86_64-redhat-linux/4.8.3/../../../../lib64/libjack.so: undefined reference to `std::__detail::_List_node_base::_M_unhook()@GLIBCXX_3.4.15' /usr/lib/gcc/x86_64-redhat-linux/4.8.3/../../../../lib64/libjack.so: undefined reference to `std::__detail::_List_node_base::_M_hook(std::__detail::_List_node_base*)@GLIBCXX_3.4.15' collect2: error: ld returned 1 exit status Waf: Leaving directory `/home/dlphilp/src/gmidimonitor-3.6/build' Build failed -> task failed (exit status 1): {task 40700176: cprogram main.c.0.o,about.c.0.o,path.c.0.o,gm.c.0.o,log.c.0.o,memory_atomic.c.0.o,sysex.c.0.o,jack.c.0.o,alsa.c.0.o -> gmidimonitor} ['gcc', 'main.c.0.o', 'about.c.0.o', 'path.c.0.o', 'gm.c.0.o', 'log.c.0.o', 'memory_atomic.c.0.o', 'sysex.c.0.o', 'jack.c.0.o', 'alsa.c.0.o', '-o', '/home/dlphilp/src/gmidimonitor-3.6/build/gmidimonitor', '-Wl,-Bstatic', '-Wl,-Bdynamic', '-lgtk-x11-2.0', '-lgdk-x11-2.0', '-latk-1.0', '-lgio-2.0', '-lpangoft2-1.0', '-lpangocairo-1.0', '-lgdk_pixbuf-2.0', '-lcairo', '-lpango-1.0', '-lfreetype', '-lfontconfig', '-lgobject-2.0', '-lglib-2.0', '-lgthread-2.0', '-lglib-2.0', '-lgmodule-2.0', '-lglib-2.0', '-ljack', '-lasound', '-llash', '-lpthread', '-luuid', '-ljack', '-lasound', '-pthread', '-pthread', '-pthread', '-pthread', '-Wl,--export-dynamic', '-pthread'] [dlphilp@localhost gmidimonitor-3.6]$ cd build/ [dlphilp@localhost build]$ g++ main.c.0.o about.c.0.o path.c.0.o gm.c.0.o log.c.0.o memory_atomic.c.0.o sysex.c.0.o jack.c.0.o alsa.c.0.o -o /home/dlphilp/src/gmidimonitor-3.6/build/gmidimonitor -Wl,-Bstatic -Wl,-Bdynamic -lgtk-x11-2.0 -lgdk-x11-2.0 -latk-1.0 -lgio-2.0 -lpangoft2-1.0 -lpangocairo-1.0 -lgdk_pixbuf-2.0 -lcairo -lpango-1.0 -lfreetype -lfontconfig -lgobject-2.0 -lglib-2.0 -lgthread-2.0 -lglib-2.0 -lgmodule-2.0 -lglib-2.0 -ljack -lasound -llash -lpthread -luuid -ljack -lasound -pthread -pthread -pthread -pthread -Wl,--export-dynamic -pthread [dlphilp@localhost build]$ ls about.c.0.o alsa.c.0.o c4che config.h config.log gm.c.0.o gmidimonitor jack.c.0.o log.c.0.o main.c.0.o memory_atomic.c.0.o path.c.0.o sysex.c.0.o

7 years, 12 months

LV2 control port (parameter) value scaling and mapping?

by Christopher Arndt

Is there a way to have the value range of a control input port of a LV2 plugin be in one range (e.g. 0.0f..1.0f or 0-127) and have the LV2 host display the values scaled or mapped to a different range (e.g. 20-20,000 Hz or 2 - 2000 ms)? I know about lv2:scalePoints and the lv2:enumeration property to handle list of discrete values and the units:unit properties to set the value unit, but how do I map the actual values of a large continuous range? Is there a way to define a transfer function? Or does that need to happen inside the plug-in code? And what about more advanced parameter display, e.g. a wet/dry setting, which I want to display as going from 100:00 through 50:50 to 0:100, but the actual parameter value is just 0.0..1.0 (or -1.0..+1.0)? Background: I'm trying to improve the JX10.ttl from the mda.lv2 collection [1], so that the parameter display in the LV2 host generated plug-in UI is more useful and intuitive, i.e. instead of e.g. the slider for OSC Tuning being going from 0.0 .. 1.0, I want it to be displayed as -24 .. +24 cents. All control input ports of the plugin are defined as taking a value 0.0f..1.0f. [1] http://svn.drobilla.net/lad/trunk/plugins/mda.lv2/ Chris

8 years

crosstalk between jack clients/ports?

by Vaclav Mach

Hi, I have the following system based on Jack API already working: /**** single PC configuration *** Jack Connections: system_capture_port->jack_port_in (jack_client_in) jack_port_out (jack_client_out)->system_playback_port process of jack_client_in: jack_port_in buffer->ringbuffer thread1: ringbuffer -> RTP stream process of jack_client_out: ringbuffer->jack_port_out buffer thread2: RTP stream -> ringbuffer *******/ Both of the clients are maintained by the same application. Sound transmission between two PCs is working well, sound is nice, we can talk to each other (something like VoIP). However, a person speaking at PC1 hears his own echo delayed and attenuated. I have found out, that the echo comes from PC2 through the RTP stream (reason of the delay). And now, the most interesting observation is that when I disconnect the Jack connection between jack_port_out and system_playback_port at PC2, the echo at PC1 is no more audible. I want to avoid the echo and I have two ideas where the problem can be: 1) there is a crosstalk between jack ports/clients 2) there is a crosstalk in my HW (mainboard sound device with intel_hda driver) Any advice or suggestion? Thanks, Vaclav

8 years

[ANN] Qtractor 0.6.7 - The Lepton Acid beta release!

by Rui Nuno Capela

It's alive! Qtractor 0.6.7 (lepton acid beta) is out! Release highlights: * MIDI instrument rendering on audio export (NEW) * MIDI clip editor view/event criteria persistence (NEW) * MIDI clip editor resilience on record/overdub (FIX) * Generic plugin form position persistence (NEW) * JACK Transport/Timebase master option (NEW) and yet more tiny lurking critters swatted ;) Well, the major highlight to this release is in fact this brand new and way long overdue feature, seamlessly integrated to the faithful and regular audio track export function: MIDI track instrument plug-in rendering and mix-down (aka. freeze) is now real, as long their audio output goes onto selected buses, aka. stems, mix-groups, whatever a mix/mastering head would name it! nb. on the (very esquisite) Qtractor arch-model parlance, those are just called "audio output buses" and that ain't gonna change, any time soon, so stop it! A word of caution must be told by now: dedicated (JACK) audio output ports are off-the-grid, so sorry. Maybe this silently makes a notch towards the DAW epitome, though Qtractor still claims to be just a plain and honest sequencer--with yet another DAW-like feature addition--the same as it ever was. Nuff said. Qtractor [1] is an audio/MIDI multi-track sequencer application written in C++ with the Qt framework [2]. Target platform is Linux, where the Jack Audio Connection Kit (JACK [3]) for audio and the Advanced Linux Sound Architecture (ALSA [4]) 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 Project page: http://sourceforge.net/projects/qtractor Downloads: http://sourceforge.net/projects/qtractor/files - source tarball: http://download.sourceforge.net/qtractor/qtractor-0.6.7.tar.gz - source package (openSUSE 13.2): http://download.sourceforge.net/qtractor/qtractor-0.6.7-17.rncbc.suse132.sr… - binary packages (openSUSE 13.2): http://download.sourceforge.net/qtractor/qtractor-0.6.7-17.rncbc.suse132.i5… http://download.sourceforge.net/qtractor/qtractor-0.6.7-17.rncbc.suse132.x8… - wiki (help wanted!): http://sourceforge.net/p/qtractor/wiki/ 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 [5]) version 2 or later. Change-log: - MIDI clip editor (aka. piano-roll) position, size, and view/event type criteria are now persistent, across session and user preferences application state. - Generic plugin form widget position is now also preserved across open/save session cycles. - MIDI clip editor resilience is about to get an improvement, fe. it doesn't close on stopping record/overdub anymore. - Introducing (JACK) Timebase master setting as an option to Transport mode (cf. View/Options.../General/Transport/Timebase). - LV2 plug-in MIDI/Event support now slanted for deprecation. - Spanish (es) translation added, by avid Reyes Pucheta. - It's live: audio track export (cf. Track/Export Tracks/Audio...) has been deeply refactored to finally include MIDI track/instrument plugins rendering (aka. freeze) on selected audio output buses on mix-down. (EXPERIMENTAL) - MIDI file player now does (N)RPN 14-bit controller events. - Track properties dialog output bus switch fix/optimization; also fixed multiple DSSI instance reference count on close. - Fixed for some strict tests for Qt4 vs. Qt5 configure builds. - German (de) translation update (by Guido Scholz, thanks). References: [1] Qtractor - An audio/MIDI multi-track sequencer http://qtractor.sourceforge.net [2] Qt framework, C++ class library and tools for cross-platform application and UI development http://qt.io/ [3] JACK Audio Connection Kit http://jackaudio.org [4] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [5] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html See also: http://www.rncbc.org/drupal/node/894 Enjoy && keep the fun. -- rncbc aka. Rui Nuno Capela

8 years

Updated API Reference Manual to 0.4.3-beta of gsequencer

by Joël Krähemann

Hi, me just updated API Reference Manual to 0.4.3-beta of gsequencer. Please visit: http://gsequencer.org/api/ags/index.html cheers, Joël

8 years

GuitarSynth now as lv2

by Gerald

Hi, GuitarSynth is now an lv2 plugin. Yep, it's true, thanks to falktx's DPF. You can get it at https://github.com/geraldmwangi/GuitarSynth-DPF. A new feature is the Overlay Input: It multiplies the synth output with the input signal frame by frame. Basically this results in the convolution of the frequency spectrum of the synth with that of the input. Have fun testing it and give me your thoughts. this was announced previously under the subject Jimson Drifts double attack. I guess no one looked at it since the subject says nothing. Sorry for that. Regards, Gerald

8 years

2023

2022

2021

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2008

2007

2006

2005

2004

2003

2002

Linux-audio-dev May 2015