Linux-audio-dev

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7516 discussions

Is this sort of window function used? (can't identify)

by Nikita Zlobin

While experimenting with window functions for spectral analyzis, I compared Hann, Sin and Lanczos. It is easy to notice, that Hann is really same as sin(x)^2. Lanczos is tiny bit better, because its sides are tiny bit smoother, compared to sin(). It seems, that unsmoothed corners between sides and zero axis for sin() is reason why sides are so high, compared to Hann. Hamming and more over Gaussian have ideal smooth sides, but narrower middle (probably this one reason why central leaf is wider for them). Just for experiment i tried to change sin(x)^2 to just sin(x)^f, where 1.0f < f < 2.0f. And it looks like any f>1 causes derivative to be =0 at zero axis. The only thing, affected by exact amount in this range, is how fast it will become zero. While it is easy to notice with Hann example, factor around 1.2 or 1.1 make it hard to notice without very deep zoom. With f=1.25 or 1.26 it nearly reproduces Lanczos, thought difference may be noticed, if plotted at the same time. Though still not have enough precise integral for weakening correction, i noticed that side leafs falldown slightly faster than for Hann. Now I'm curious, is such function is in use? I don't know how to call it for search request. E.g., after reinventing Welch window by just multiplicating y=2x with y=2-2x, I already knew it is parabola. For sin(x)/x i know it is sinc. But what is sin(x)^y, at least at some 'y' between 1 and 2 ? I feel, that this is also something reinvented. Just like writing sin(x)^2, i discovered later that it is Hann. Need help. One of professors, who are still aware of signal processing stuff, adviced me to reed this book (found localized to russian): https://www.scirp.org/(S(351jmbntvnsjt1aadkposzje))/reference/ReferencesPap… but i still have to find time to learn it (besides of deepening my math knowledge).

6 years, 6 months

How do you improve optimization for integer calculations?

by Nikita Zlobin

Hello. I just have attempt, writing serious application, considering language (C), tookit (gtk3, cairo, pango, etc) and that it is audio app. Besides that many audio things use simple "float" for audio data, i noticed some posts, where tension towards integer math appeared. While it is not my case (my app is jack-based, and audio data have FP type everywhere), i slightly distracted from audio side. My app for now is spectrum analyzer, which later should evolve into couple of spectral editing helper utilities (more exactly to generate spectrogram and apply changes either by resynth or by filtering with diff spectrogram). I distracted to experiments with graphics post-processing for instant spectrum view rendering. Due to cairo nature, color data in cairo image surface may be at best argb32, rgb24 and rgb30 (for now i implemented uspport only for first two). As result post-processing is all done in integer mode. I can understand this, as i noticed that channel orders in memory depends on endianness, what points that cairo relies more on masks and bitshifts than for byte value arrays where is possible. I decided to look in debugger for how gcc does optimize these ops. Noticed following. Below is code chunk from kdbg with some asm blocks expanded. There is only one line, where i tried to use floating point ops, just for comparison (plus some context for better understanding). for (int l = 0; l < 3; l++) for (int c = 0; c < 3; c++) { unsigned char * p = bpix[l][c]; col[0] += p[0] , 0x5b27 movzbl 0x60(%rsp),%esi col[1] += p[1] , 0x5a34 movzbl 0x65(%rsp),%eax col[2] += p[2] , 0x5a42 movzbl 0x62(%rsp),%edx col[3] += p[3]; 0x5a47 movzbl 0x67(%rsp),%esi 0x5a4c mov 0x10(%rsp),%rbp } col[0] /= 9.0, col[1] /= 9.0, col[2] /= 9.0, col[3] /= 9.0; 0x5a39 pxor %xmm0,%xmm0 op[0] += col[0] , 0x5b8d add %sil,0x0(%rbp) op[1] += col[1] , 0x5b94 add %cl,0x1(%rbp) op[2] += col[2] , 0x5b97 add %dl,0x2(%rbp) op[3] += col[3]; 0x5b91 add %al,0x3(%rbp) for (int l = 0; l < 3; l++) ip[l] += 3; op += ch_n; } Notice, how line, containing chain of divisions, is compiled to single sse operation. What is interesting, this is only asm line, involving xmm or imm - i can't find anything else like mov, involving these registers. With division to integer 9 - it is still one line, but no xmm is involved. col[0] += p[0] , 0x5b17 movzbl 0x64(%rsp),%eax col[1] += p[1] , 0x5a35 movzbl 0x65(%rsp),%eax col[2] += p[2] , 0x5a4a movzbl 0x7e(%rsp),%esi col[3] += p[3]; 0x5a4f movzbl 0x7f(%rsp),%ecx } col[0] /= 9, col[1] /= 9, col[2] /= 9, col[3] /= 9; 0x5a3a mov $0x38e38e39,%r8d op[0] += col[0] , 0x5b78 add %dl,0x0(%rbp) op[1] += col[1] , 0x5b3a add %dil,0x1(%rbp) As for GCC opts, i used unusual combo "-march=native -O3 -g" in order to get exhausing optimization, but still keep it readable for kdbg disasm to get a look. While searching for info about sse integer support, search pointed me to wikipedia page about x86 instructions, where i found almost enough instruction set - logical, add, sub and mul, signed and unsigned, words and bytes (at least in SSE2 which according to description enabled MMX set to use SSE registers, where integer support was primary in MMX). So, i'm in maze - why doesn't gcc involve such ops in integer mode? Could it be possible, that what it did is better without SSE? I'm about to eventually try more FP ops in this place but unsure, about possible conversions, since source and dest are anyway cairo surfaces with integer data.

6 years, 6 months

ALSA hi-res timer not found until Jack is run

by Tim

On 4/14/19 5:42 PM, Tim wrote: > Hi list. > When I fist boot each day, this is what I get, > no hi-res timer: > > cat /proc/asound/timers > G0: system timer : 4000.000us (10000000 ticks) > P0-0-0: PCM playback 0-0-0 : SLAVE > P0-0-1: PCM capture 0-0-1 : SLAVE > P2-0-1: PCM capture 2-0-1 : SLAVE > > > But after I start Jack, I get this: > > cat /proc/asound/timers > G0: system timer : 4000.000us (10000000 ticks) > G3: HR timer : 0.001us (1000000000 ticks) > Client sequencer queue -1 : running <<< Jack I believe > P0-0-0: PCM playback 0-0-0 : SLAVE > P0-0-1: PCM capture 0-0-1 : SLAVE > P2-0-1: PCM capture 2-0-1 : SLAVE > > > But curiously, after I *quit* Jack and Jack dbus > and ensure they are not running, I still get this: > > cat /proc/asound/timers > G0: system timer : 4000.000us (10000000 ticks) > G3: HR timer : 0.001us (1000000000 ticks) > P0-0-0: PCM playback 0-0-0 : SLAVE > P0-0-1: PCM capture 0-0-1 : SLAVE > P2-0-1: PCM capture 2-0-1 : SLAVE > > Notice the hi-res timer is now still available. > What's happening? > I can only see that Jack uses pcm and seq but no timers. > Seems by virtue of Jack using pcm/seq, ALSA loads a module > or something. Ah, that would be snd_hrtimer I suppose. Module Size Used by snd_hrtimer 16384 1 <<< Jack It's been a while since I had to force a module to load or think about these things. Let's see, how to do it these days... And how to do it through our app. Could it be considered a bug that it is not available? Sorry for the noise. Tim. > > How can I ensure that the hi-res timer is available > always from boot up? Must I manually load a module? > Most *importantly*, can I do this through our application > software so that users do not have to load a module? > > Thanks. > Tim.

6 years, 6 months

[ANN] Vee One Suite 0.9.7 - Spring-Break'19 Release batch #2

by Rui Nuno Capela

Wholly cheers! The 'Vee One Suite' of 'old-school' software instruments are here again and now released for the second QStuff* Spring-Break'19 batch post-LAC2019 [12] frenzy: * synthv1 0.9.7 [1] * samplv1 0.9.7 [2] * drumkv1 0.9.7 [3] * padthv1 0.9.7 [4] All still delivered in dual form: - a pure stand-alone JACK client with JACK-session [5], NSM (Non Session management [6]) and both JACK MIDI and ALSA MIDI [7] input support; - a LV2 instrument plug-in [8]. Changes are that there are quite a few fixes since previous releases: - Corrected sample offset and loop range internal reset (samplv1 [2] and drumkv1 [3] only). - All audio input now get through without being processed by any or whole effects stage anymore. - Re-defined all JACK stand-alone client application UNIX signal handling. - Probable fix to sample offset and loop range changes across native UI and loading and saving state. (samplv1 [2] and drumkv1 [3] only). The 'Vee One Suite' are free, open-source Linux Audio [10] software, distributed under the terms of the GNU General Public License (GPL) [11] version 2 or later. Make the fun great again! **synthv1 - an old-school polyphonic synthesizer [1] ** synthv1 0.9.7 (spring-break'19) 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: https://synthv1.sourceforge.io http://synthv1.sourceforge.net downloads: http://sourceforge.net/projects/synthv1/files - source tarball: http://download.sf.net/synthv1/synthv1-0.9.7.tar.gz - source package: http://download.sf.net/synthv1/synthv1-0.9.7-44.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): http://download.sf.net/synthv1/synthv1-0.9.7-44.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): http://download.sf.net/synthv1/synthv1-0.9.7-11.x86_64.AppImage git repos: https://git.code.sf.net/p/synthv1/code https://github.com/rncbc/synthv1.git https://gitlab.com/rncbc/synthv1.git https://bitbucket.org/rncbc/synthv1.git **samplv1 - an old-school polyphonic sampler [2]** samplv1 0.9.7 (spring-break'19) is out! samplv1 is an old-school polyphonic sampler synthesizer with stereo fx. LV2 URI: http://samplv1.sourceforge.net/lv2 website: https://samplv1.sourceforge.io http://samplv1.sourceforge.net downloads: http://sourceforge.net/projects/samplv1/files - source tarball: http://download.sf.net/samplv1/samplv1-0.9.7.tar.gz - source package: http://download.sf.net/samplv1/samplv1-0.9.7-44.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): http://download.sf.net/samplv1/samplv1-0.9.7-44.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): http://download.sf.net/samplv1/samplv1-0.9.7-11.x86_64.AppImage git repos: https://git.code.sf.net/p/samplv1/code https://github.com/rncbc/samplv1.git https://gitlab.com/rncbc/samplv1.git https://bitbucket.org/rncbc/samplv1.git **drumkv1 - an old-school drum-kit sampler [3]** drumkv1 0.9.7 (spring-break'19) is out! drumkv1 is an old-school drum-kit sampler synthesizer with stereo fx. LV2 URI: http://drumkv1.sourceforge.net/lv2 website: https://drumkv1.sourceforge.io http://drumkv1.sourceforge.net downloads: http://sourceforge.net/projects/drumkv1/files - source tarball: http://download.sf.net/drumkv1/drumkv1-0.9.7.tar.gz - source package: http://download.sf.net/drumkv1/drumkv1-0.9.7-40.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): http://download.sf.net/drumkv1/drumkv1-0.9.7-40.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): http://download.sf.net/drumkv1/drumkv1-0.9.7-11.x86_64.AppImage git repos: https://git.code.sf.net/p/drumkv1/code https://github.com/rncbc/drumkv1.git https://gitlab.com/rncbc/drumkv1.git https://bitbucket.org/rncbc/drumkv1.git **padthv1 - an old-school polyphonic additive synthesizer [4]** padthv1 0.9.7 (spring-break'19) is out! padthv1 is an old-school polyphonic additive synthesizer with stereo fx. padthv1 is based on the PADsynth algorithm by Paul Nasca, as a special variant of additive synthesis. LV2 URI: http://padthv1.sourceforge.net/lv2 website: http://padthv1.sourceforge.net https://padthv1.sourceforge.io downloads: http://sourceforge.net/projects/padthv1/files - source tarball: http://download.sf.net/padthv1/padthv1-0.9.7.tar.gz - source package: http://download.sf.net/padthv1/padthv1-0.9.7-11.rncbc.suse.src.rpm - binary package (openSUSE Tumbleweed): http://download.sf.net/padthv1/padthv1-0.9.7-11.rncbc.suse.x86_84.rpm - AppImage [9] package (JACK stand-alone only): http://download.sf.net/padthv1/padthv1-0.9.7-11.x86_64.AppImage git repos: https://git.code.sf.net/p/padthv1/code https://github.com/rncbc/padthv1.git https://gitlab.com/rncbc/padthv1.git https://bitbucket.org/rncbc/padthv1.git 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] padthv1 - an old-school polyphonic additive synthesizer http://padthv1.sourceforge.net/ [5] JACK Audio Connection Kit http://jackaudio.org/ [6] NSM, Non Session Management http://non.tuxfamily.org/nsm/ [7] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [8] LV2, Audio Plugin Standard, the extensible successor of LADSPA http://lv2plug.in/ [9] AppImage, Linux apps that run anywhere http://appimage.org/ [10] Linux Audio consortium of libre software for audio-related work http://linuxaudio.org [11] GNU General Public License http://www.gnu.org/copyleft/gpl.html [12] LAC2019@CCRMA-Stanford, March 22–26 2019 https://lac.linuxaudio.org/2019/ See also: https://www.rncbc.org/drupal/node/1997 Enjoy. -- rncbc aka. Rui Nuno Capela

6 years, 6 months

LAC 2019 Videos

by Thomas Brand

Hi, does anybody have information where to find the recorded videos from LAC 2019 or when they will eventually become available? Thanks, Thomas

6 years, 7 months

Re: [LAD] 'A' note Tuning Range

by John Rigg

On Thu, Apr 11, 2019 at 12:17:58PM +0200, linux(a)justmail.de wrote: > On Thu, 2019-04-11 at 08:37 +0100, Will J Godfrey wrote: > > On Thu, 11 Apr 2019 08:16:29 +0000 > > John Rigg <ladev9(a)jrigg.co.uk> wrote: > > > A Korg GA-1 tuner can go down to 5 semitones flat. It's quite common > > > in the heavier styles of rock music to downtune a few semitones. > > Interesting. Thanks for that. > > Assuming the guitar tuner is a chromatic tuner, dropped and lowered > guitar tunings don't require anything else than A = 440 Hz and if you > dislike 440Hz a range from + half of a semitone (+50 cent) to - half of > a semitone (-50 Cent). > > https://en.wikipedia.org/wiki/List_of_guitar_tunings#Dropped > https://en.wikipedia.org/wiki/List_of_guitar_tunings#Lowered That's all very well, but tuning quickly on stage in a live gig is lot easier if your tuner goes down to the right pitch with minimal fuss. (Speaking from long experience as gigging guitarist and bassist). The GA-1 tuner I mentioned isn't a true chromatic tuner, but its ability to shift the standard guitar tunings down several semitones is very useful. In modern metal genres C or B tunings are probably more common than the standard EADGBE, so this isn't just an edge case. John

6 years, 7 months

[ANN] The QStuff* Spring Break'19 release batch #1

by Rui Nuno Capela

Cheers! Interesting times we're living in... The first batch to the so called Qstuff* Spring Break'19 is now being delivered as fully complementary as post-LAC2019 [21] frenzy ;) And in this batch, we have: * QjackCtl 0.5.7 [1] * Qsynth 0.5.6 [2] * Qsampler 0.5.5 [3] * QXGEdit 0.5.4 [4] * QmidiCtl 0.5.4 [5] * QmidiNet 0.5.4 [6] All the boring (to death) details, below... ** QjackCtl - JACK Audio Connection Kit Qt GUI Interface [1] ** QjackCtl 0.5.7 (spring-break'19) is out! QjackCtl is a(n ageing yet modern, not so 'simple' anymore) Qt [7] application to control the JACK [8] sound server, for the Linux Audio [12] infrastructure. Website: https://qjackctl.sourceforge.io http://qjackctl.sourceforge.net Project page: http://sourceforge.net/projects/qjackctl Downloads: http://sourceforge.net/projects/qjackctl/files - source tarball: http://download.sf.net/qjackctl/qjackctl-0.5.7.tar.gz - source package: http://download.sf.net/qjackctl/qjackctl-0.5.7-36.rncbc.suse.src.rpm - binary package: http://download.sf.net/qjackctl/qjackctl-0.5.7-36.rncbc.suse.x86_64.rpm - AppImage [20] package: http://download.sf.net/qjackctl/qjackctl-0.5.7-9.x86_64.AppImage Git repos: https://git.code.sf.net/p/qjackctl/code https://github.com/rncbc/qjackctl.git https://gitlab.com/rncbc/qjackctl.git https://bitbucket.com/rncbc/qjackctl.git Change-log: - Graph node and port title renaming and nodes position move changes are now undo/redo-able. - Graph client and port title in-place renaming is now integrated to native aliases and JACK metadata (aka. pretty-names). - Refactored all native client/port name aliases. - Re-defined all main application UNIX signal handling. ** Qsynth - A fluidsynth Qt GUI Interface [2] ** Qsynth 0.5.6 (spring-break'19) is out! Qsynth is a FluidSynth [10] GUI front-end application written in C++ around the Qt framework [7] using Qt Designer. Website: https://qsynth.sourceforge.io http://qsynth.sourceforge.net Project page: http://sourceforge.net/projects/qsynth Downloads: http://sourceforge.net/projects/qsynth/files - source tarball: http://download.sf.net/qsynth/qsynth-0.5.6.tar.gz - source package: http://download.sf.net/qsynth/qsynth-0.5.6-17.rncbc.suse.src.rpm - binary package: http://download.sf.net/qsynth/qsynth-0.5.6-17.rncbc.suse.x86_64.rpm - AppImage [20] package: http://download.sf.net/qsynth/qsynth-0.5.6-9.x86_64.AppImage Git repos: https://git.code.sf.net/p/qsynth/code https://github.com/rncbc/qsynth.git https://gitlab.com/rncbc/qsynth.git https://bitbucket.com/rncbc/qsynth.git Change-log: - Re-defined all main application UNIX signal handling. ** Qsampler - A LinuxSampler Qt GUI Interface [3] ** Qsampler 0.5.5 (spring-break'19) is out! Qsampler is a LinuxSampler [11] GUI front-end application written in C++ around the Qt framework [7] using Qt Designer. Website: https://qsampler.sourceforge.io http://qsampler.sourceforge.net Project page: http://sourceforge.net/projects/qsampler Downloads: http://sourceforge.net/projects/qsampler/files - source tarballs: http://download.sf.net/qsampler/qsampler-0.5.5.tar.gz - source package: http://download.sf.net/qsampler/qsampler-0.5.5-29.rncbc.suse.src.rpm - binary package: http://download.sf.net/qsampler/qsampler-0.5.5-29.rncbc.suse.x86_64.rpm - AppImage [20] package: http://download.sf.net/qsampler/qsampler-0.5.5-9.x86_64.AppImage Git repos: https://git.code.sf.net/p/qsampler/code https://github.com/rncbc/qsampler.git https://gitlab.com/rncbc/qsampler.git https://bitbucket.com/rncbc/qsampler.git Change-log: - Re-defined all main application UNIX signal handling. ** QXGEdit - A Qt XG Editor [4] ** QXGEdit 0.5.4 (spring-break'19) is out! QXGEdit is a live XG instrument editor, specialized on editing MIDI System Exclusive files (.syx) for the Yamaha DB50XG [14] and thus probably a baseline for many other XG devices. Website: https://qxgedit.sourceforge.io http://qxgedit.sourceforge.net Project page: http://sourceforge.net/projects/qxgedit Downloads: http://sourceforge.net/projects/qxgedit/files - source tarball: http://download.sf.net/qxgedit/qxgedit-0.5.4.tar.gz - source package: http://download.sf.net/qxgedit/qxgedit-0.5.4-15.rncbc.suse.src.rpm - binary package: http://download.sf.net/qxgedit/qxgedit-0.5.4-15.rncbc.suse.x86_64.rpm - AppImage [20] package: http://download.sf.net/qxgedit/qxgedit-0.5.4-9.x86_64.AppImage Git repos: https://git.code.sf.net/p/qxgedit/code https://github.com/rncbc/qxgedit.git https://gitlab.com/rncbc/qxgedit.git https://bitbucket.com/rncbc/qxgedit.git Change-log: - Re-defined all main application UNIX signal handling. ** QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast [5] ** QmidiCtl 0.5.4 (spring-break'19) is out! QmidiCtl [5] is a MIDI remote controller application that sends MIDI data over the network, using UDP/IP multicast. Inspired by multimidicast [15] and designed to be compatible with ipMIDI [15] for Windows. QmidiCtl [5] was long ago designed for the Maemo [17] enabled handheld devices, namely the late Nokia N900 [18] and promoted to the Maemo Package [18] repositories. Nevertheless, QmidiCtl [5] may still be found effective as a regular desktop application and recently as an Android application as well. Website: https://qmidictl.sourceforge.io http://qmidictl.sourceforge.net Project page: http://sourceforge.net/projects/qmidictl Downloads: http://sourceforge.net/projects/qmidictl/files - source tarball: http://download.sf.net/qmidictl/qmidictl-0.5.4.tar.gz - source package: http://download.sf.net/qmidictl/qmidictl-0.5.4-16.rncbc.suse.src.rpm - binary package: http://download.sf.net/qmidictl/qmidictl-0.5.4-16.rncbc.suse.x86_64.rpm - AppImage [20] package: http://download.sf.net/qmidictl/qmidictl-0.5.4-9.x86_64.AppImage - Android package: http://download.sf.net/qmidictl/qmidictl-0.5.4-9.apk https://play.google.com/store/apps/details?id=org.rncbc.qmidictl Git repos: https://git.code.sf.net/p/qmidictl/code https://github.com/rncbc/qmidictl.git https://gitlab.com/rncbc/qmidictl.git https://bitbucket.com/rncbc/qmidictl.git Change-log: - Fix build on linux with musl (according to POSIX.1-2001, POSIX.1-2008; PR#3 by Andreas Müller aka. schnitzeltony, thanks). - HiDPI display screen support (Qt >= 5.6). ** QmidiNet - A MIDI Network Gateway via UDP/IP Multicast [6] ** QmidiNet 0.5.4 (spring-break'19) is out! QmidiNet is a MIDI network gateway application that sends and receives MIDI data (ALSA-MIDI [9] and JACK-MIDI [8]) over the network, using UDP/IP multicast. Inspired by multimidicast [15] and designed to be compatible with ipMIDI [16] for Windows. Website: https://qmidinet.sourceforge.io http://qmidinet.sourceforge.net Project page: http://sourceforge.net/projects/qmidinet Downloads: http://sourceforge.net/projects/qmidinet/files - source tarball: http://download.sf.net/qmidinet/qmidinet-0.5.4.tar.gz - source package: http://download.sf.net/qmidinet/qmidinet-0.5.4-17.rncbc.suse.src.rpm - binary package: http://download.sf.net/qmidinet/qmidinet-0.5.4-17.rncbc.suse.x86_64.rpm - AppImage [20] package: http://download.sf.net/qmidinet/qmidinet-0.5.4-9.x86_64.AppImage Git repos: https://git.code.sf.net/p/qmidinet/code https://github.com/rncbc/qmidinet.git https://gitlab.com/rncbc/qmidinet.git https://bitbucket.com/rncbc/qmidinet.git Change-log: - Fix build on linux with musl (according to POSIX.1-2001, POSIX.1-2008; PR#7 by Andreas Müller aka. schnitzeltony, thanks). License: All of the Qstuff* are free, open-source Linux Audio [11] software, distributed under the terms of the GNU General Public License (GPL) version 2 or later [12]. References: [1] QjackCtl - A JACK Audio Connection Kit Qt GUI Interface https://qjackctl.sourceforge.io [2] Qsynth - A fluidsynth Qt GUI Interface https://qsynth.sourceforge.io [3] Qsampler - A LinuxSampler Qt GUI Interface https://qsampler.sourceforge.io [4] QXGEdit - A Qt XG Editor https://qxgedit.sourceforge.io [5] QmidiCtl - A MIDI Remote Controller via UDP/IP Multicast https://qmidictl.sourceforge.io [6] QmidiNet - A MIDI Network Gateway via UDP/IP Multicast https://qmidinet.sourceforge.io [7] Qt framework, C++ class library and tools for cross-platform application and UI development http://qt.io/ [8] JACK Audio Connection Kit http://jackaudio.org [9] ALSA, Advanced Linux Sound Architecture http://www.alsa-project.org/ [10] FluidSynth - A SoundFont Synthesizer A real-time software synthesizer based on SoundFont 2 specifications http://www.fluidsynth.org [11] LinuxSampler - The Linux Sampler Project A modular, streaming capable, realtime audio sampler http://www.linuxsampler.org [12] Linux Audio consortium of libre software for audio-related work http://linuxaudio.org [13] GPL - GNU General Public License http://www.gnu.org/copyleft/gpl.html [14] Yamaha DB50XG http://www.soundonsound.com/sos/1996_articles/may96/yamahadb50xg.html [15] multimidicast - sends and receives MIDI from ALSA sequencers over network http://llg.cubic.org/tools/multimidicast [16] ipMIDI - MIDI over Ethernet ports - send MIDI over your LAN http://nerds.de [17] Maemo.org - Home of the Maemo community http://www.maemo.org [18] Maemo.org Wiki - Nokia N900 http://wiki.maemo.org/Nokia_N900 [19] Maemo.org - Downloads: QmidiCtl http://maemo.org/downloads/product/Maemo5/qmidictl [20] AppImage, Linux apps that run anywhere http://appimage.org/ [21] LAC2019@CCRMA-Stanford, March 22–26 2019 https://lac.linuxaudio.org/2019/ See also: https://www.rncbc.org/drupal/node/1996 Enjoy && Keep the fun! -- rncbc aka Rui Nuno Capela

6 years, 7 months

'A' note Tuning Range

by Will Godfrey

Currently in 'Scales' Yoshimi can set this anywhere between 1Hz and 2kHz, which is frankly ridiculous. This doesn't appear at all in the Scala documentation, so that's no guide. I've had suggestions ranging from +- 1/2 semitone to +- half octave as being more than enough, considering that there is also semitone master key shift covering +- 3 octaves (used to be 5!) along with a fine detune of +63 -64 cents. What have other synth people here set for this? Does anyone else actually have the setting? -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

6 years, 7 months

Jack Internal Clients

by Spencer Jackson

Hi all: I've been trying to make my OSC2MIDI app work as an internal client for the MOD Duo. However I've got some misunderstanding or something. I'm first just trying it on desktop (debian) but even compiling the example internal client at https://github.com/jackaudio/jack2/blob/develop/example-clients/inprocess.c and running lack_load /home/spencer/inprocess yeilds the same result as when I try to run osc2midi. It fails with the message intclient = 0 status = 0x1 Are the internal clients supposed to be in a special directory or something? I haven't had any luck with the googles for documentation or examples beyond the source for the client. My source is at https://github.com/ssj71/OSC2MIDI/tree/jack_internal/src if it helps. If more information about my system or whatever would be helpful just let me know. Thanks, _Spencer

6 years, 7 months

[LAA] [LAU] Guitarix 0.38.1 Bug Fix release

by Hermann Meyer

Guitarix release 0.38.1 Guitarix is a tube amplifier simulation for jack (Linux), with an additional mono and a stereo effect rack. Guitarix includes a large list of LV2 and LADSPA plugins, and support LADSPA / LV2 plugs as well in it's racks. The guitarix engine is designed for LIVE usage, and feature ultra fast, glitch and click free preset switching and is full Midi and remote controllable (the Web UI is not included in the distributed tar ball). *This is a critical bug-fix release.* In version 0.38.0 the state (preset) wasn't loaded correctly by the engine on startup, this release fix that. When you've already upgraded to 0.38.0, please consider to update again to 0.38.1 Still the LV2 plugins coming with guitarix using a Gtkmm based UI, I'll work on it to port them to X11 based UI's. Refer to our project page for more information: http://guitarix.org Download Site: http://sourceforge.net/projects/guitarix/ enjoy regards hermann

6 years, 7 months

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