[LAD] OpenAV Releases Jan 2021

Hey Linux Audio *, After some time away, OpenAV is back with some updated releases! Much of the work done in these releases was in collaboration with the Linux Audio Developers and Uesrs community, thanks for your contributions! This release announce email includes ArtyFX 1.3.1, a dot release

[LAD] OpenAV Luppp 1.2 Release

Hey All, Its been a long time, but there's a new Luppp release out now, version 1.2 https://github.com/openAVproductions/openAV-Luppp/releases/tag/release-1.2.0 Huge thanks to all the contributors, this release was largely driven by contributions, and community interaction and interest in the

Re: [LAD] Drift compensation document

On Fri, Sep 8, 2017 at 6:28 PM, benravin wrote: > Hi Paul, > > I feel its better to add these support as well in JACK framework, like > sending control signals, notifications etc, rather than user has to > implement these. > Hi Ben, Please be aware of "top posting" - it

Re: [LAD] DSP transients

On Sun, Sep 3, 2017 at 3:02 PM, Will J Godfrey wrote: > > On Sun, 3 Sep 2017 13:35:47 + > Fons Adriaensen wrote: > > >On Sun, Sep 03, 2017 at 08:50:08AM +0100, Will Godfrey wrote: > > > >> Does anyone know of software that can log these

Re: [LAD] youtube blocks LAC 2017 May 18 AM

On Mon, May 22, 2017 at 2:04 PM, Thomas Cipierre wrote: > Dear LAC2017, > > I’m part of the LAC2017 committee, and was nearly all the time involved in > the IRC #LAC2017 freenode channel as tcUJM (except one chairing session). > Hi Thomas, Thanks for taking

Re: [LAD] LAC 2017 Program - Linux Audio Conference in Saint-Etienne

On 3 May 2017 22:53, "Simon van der Veldt" wrote: Well, this will be my first LAC, so I'm pretty new to all of this, but I'd very much like to join if that's OK. As long as they have something vegetarian that's half way decent I'll be fine :) +1 I'm in for pre-conf

[LAD] OpenAV Release Spree, Dec 2016

Hey All! OpenAV has just pushed releases for Luppp, ArtyFX, Fabla, and Sorcer! Release Video: https://youtu.be/s07wNn9Xc7s But what's more, there's now an OpenAV Manual: detailed and useful information about all of the OpenAV projects, and what features they can do for you:

Re: [LAD] Portaudio or something else?

On Thu, Sep 8, 2016 at 8:54 AM, Christopher Arndt wrote: > Am 08.09.2016 um 09:25 schrieb Bengt Gördén: >> Is Portaudio the best choice for portability or >> is there some other option that might be better? > > You might want to have a look at RtAudio or even JUCE too.

Re: [LAD] Realtime inter-thread communication

On Mon, Feb 29, 2016 at 7:52 PM, Spencer Jackson wrote: > > The generic solution for cases like this is a lock-free ringbuffer. > I've also used the jack ringbuffer for this and it was easy enough. Simple tutorial on using JACK ringbuffer and C++ event class here:

[LAD] MOD and OpenAV on FLOSS Weekly Interview

Hi All, Just a note that today(Tuesday 23rd) OpenAV Productions[1] and MOD[2] will be interviewed by the FLOSS Weekly show. Live link, 5:30 pm Irish / UK time: https://twit.tv/live Use this link to figure out what time that is in your time-zone :)

Re: [LAD] cpu spikes

On Mon, Feb 8, 2016 at 10:07 AM, Fokke de Jong wrote: > And the result is super-stable audio with a period of 32 samples @48Khz > (for a total roundtrip latency of 3.5ms). > Congrats, that's pretty solid! Would you share some details on what config options you used, and

Re: [LAD] RME madi latency

On Thu, Feb 4, 2016 at 11:22 AM, Fokke de Jong wrote: > So now i am a but confused how to get the same kind of latency in my own code (using alsa directly rather than through jack) Are you coding ALSA yourself, or using a helper library? I can recommend Fons'

Re: [LAD] Linuxaudio.org server migration

On Wed, Jan 27, 2016 at 6:22 PM, Ivica Ico Bukvic wrote: > The migration should be now complete. Please let us know if you encounter > any problems. > I clicked a heap of links, and tried breaking it - did not manage :) Thanks for your effort - appreciated! Cheers, -Harry

Re: [LAD] cpu spikes

On Sun, Jan 24, 2016 at 2:03 PM, Fokke de Jong wrote: > Currently working on some realtime convolution with lots of channels and > low latency requirements, but I am running into some unexpected cpu-spikes > and hope some of you might have an idea of possible causes. >

Re: [LAD] JACK and vanilla 3.19.2 startup issue

On Mon, Jun 8, 2015 at 10:18 PM, Gerald gerald.mwa...@gmx.de wrote: Just out of interest: why are you trying to run jack as root? $ whoami root I am root, a user who likes to run JACK for audio :) Cheers, -Harry PS: Yes I'm aware of security concerns etc --

Re: [LAD] GuitarSynth

On Tue, Apr 28, 2015 at 12:57 AM, Tim E. Real termt...@rogers.com wrote: The effect is striking. You can hear it without even plugging the guitar in. As you adjust the pickup ever higher, and pluck the strings, you can hear the horrible overtones from the frequency splitting. Wow really? I

Re: [LAD] User eXperience in Linux Audio

On Fri, Apr 24, 2015 at 2:26 PM, Len Ovens l...@ovenwerks.net wrote: In my opinion the best slider will allow the pointing device (finger or mouse) to be placed anywhere on the slider and moving the mouse will move the value from where it was in the direction the finger moves. (Ardour fader

Re: [LAD] User eXperience in Linux Audio

Hi *, Some good points, and interesting points of view. @Thijs van Severen: I completed various UX / UI modules during my undergrad - that, together with the most obvious lacks (IMO) of Linux Audio UX is what prompted my composing of that exact list. Tracey Hytry wrote: a brief splash screen

[LAD] User eXperience in Linux Audio

Hi All, As promised just at the closing ceremony of LAC, an email opening the discussion of User Experience on Linux Audio. To all Developers, please use this as a checklist and consider supporting each item. It will improve the user experience. 1: Splash Screen If an app takes more than one

[LAD] OpenAV ArtyFX 1.3 Call for testing

Hi All, As OpenAV it is my pleasure to call for testing of ArtyFX 1.3. The code is available online right now! [1] New plugins include: - Driva (Guitar Distortion) - Whaaa (Wah pedal) Credits: - Whaaa DSP from WAH Plugins by Fons - Driva distortion algorithms ported from Rakarack project

[LAD] JACK and vanilla 3.19.2 startup issue

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

Re: [LAD] jack2 API

On Tue, Mar 31, 2015 at 2:02 PM, Vaclav Mach vaclav.m...@artisys.aero wrote: What am I doing wrong? Or is it a bad way of using JACK2? Hi, You seem to want to write JACK clients - using C++. To do this you use the JACK C API, which is the same for JACK 1 and JACK 2. Details of the difference

Re: [LAD] Wave shapes forms

On Tue, Oct 21, 2014 at 2:56 PM, Philippe Coatmeur phi...@gnu.org wrote: Sends a sine wave to output (this is the standard sin http://www.cplusplus.com/reference/cmath/sin/ math function, right?) then what would send a square wave? What would send noise? If only it were so simple... Sine

Re: [LAD] Fwd: Re: How can an LV2 plugin UI get the value of a control port from the plugin?

On Mon, Oct 20, 2014 at 1:39 AM, Philippe Coatmeur phi...@gnu.org wrote: lots of emails Hi Philippe, I can't follow the issue you're having here: you've sent 8 emails, most with different questions with a layout that is hard to follow: please be more careful in what text you reply to, and remove

Re: [LAD] Fwd: Re: How can an LV2 plugin UI get the value of a control port from the plugin?

On Mon, Oct 20, 2014 at 12:26 PM, Philippe Coatmeur phi...@gnu.org wrote: Now for the direct questions: - Is it a proper NTK widget class declaration, that would expose a value() method? - Are those proper NTK widget class instances? You must derive from an NTK widget in order for

Re: [LAD] How can an LV2 plugin UI get the value of a control port from the plugin?

On Fri, Oct 17, 2014 at 1:30 PM, Phil CM phi...@gnu.org wrote: Also each time the UI is opened, the widgets are reset at maximum (not the values). Hi Phil, Glad to see you're excited and working hard on learning LV2! Checkout the example plugins: they show how things work. In the UI, there

Re: [LAD] LV2 Pitch bend control port (and function)

On Thu, Oct 2, 2014 at 1:14 PM, Phil CM phi...@gnu.org wrote: I need a synth with a pitch control. A synth that can be controlled to produce all tones between one note and another, say from a2 to c3 in an anti-aliased way, like what you would get in pd by altering the pitch of a sine wave. Hi

Re: [LAD] LV2 Pitch bend control port (and function)

Hi, When replying, please be careful to reply to the list, as well as the person: otherwise 1/2 a conversation gets lost ;) I've included linux-audio-dev@lists.linuxaudio.org again. On Thu, Oct 2, 2014 at 4:13 PM, Phil CM phi...@gnu.org wrote: On 02/10/2014 14:13, Harry van Haaren wrote

Re: [LAD] LV2 Pitch bend control port (and function)

On Thu, Oct 2, 2014 at 7:02 PM, Phil CM phi...@gnu.org wrote: Funny, I was just reading your blog post about it :) Its pretty outdated by now, lv2plug.in/book is the new resource IMO. But I'm leaving it there for the sake of it :) But I cannot get it to build because of a gtkmm error:

Re: [LAD] Experience driven design and Linux Audio

Fons wrote: The many times I've had to set a delay time the most convenient unit could have been samples, millisecs or meters (at the speed of sound), depending on the context Sure, there are uses (particularly your fields of WFS, Ambisonics, and related) where such uses are prevailent. Aka,

Re: [LAD] Experience driven design and Linux Audio

Hi all, There's a lot of interesting points brought up: I've only just had the time to read them, and reply to the points that most speak to me (the individual) and me (as OpenAV). Charles Henry wrote: There does not currently exist a company that is credibly making a complete, whole-system

Re: [LAD] Experience driven design and Linux Audio

On Wed, Oct 1, 2014 at 12:26 PM, Joël Krähemann weedli...@gmail.com wrote: Why doesn't Harry learn howto do a dial. I just take a look at his code and it just sucks. Hi Joel, The topic isn't the quality of my code: I'm sorry to hear you feel it just sucks. If you wish to discuss the quality of

[LAD] Experience driven design and Linux Audio

Hi Linux Audio Developers, TL;DR; Discussing experience driven design for linux audio. I'd like to discuss the age of experiences. Allow me 10 minutes of your time, to watch a video by Aral Balkan talk about development of technology, FLOSS, design, and the future. To start, please watch the

Re: [LAD] using libsndfile to write signed short

On Sat, Sep 27, 2014 at 6:11 AM, Joël Krähemann weedli...@gmail.com wrote: Am I correct assuming 1 sample of stereo frames will be written 44100 times by a rate of 44100 Hz audio sampled data? Yes. Just to be 100% clear, a sample is a *single* point of data. In a mono situation: a frame refers

Re: [LAD] using libsndfile to write signed short

On Thu, Sep 25, 2014 at 8:50 PM, Joël Krähemann weedli...@gmail.com wrote: Does someone know about writing WAV using libsndfile? My file becomes 174M big as using sf_writef_short() within 8s Are you sure you're only writing each sample once? Sounds like there's an error in writing nframe

Re: [LAD] Digital Effects

On Fri, Aug 22, 2014 at 3:12 PM, t...@trellis.ch wrote: is it correct that the following two scenarios give the exact same result? (digital audio signal) - (record) - (playback) - (apply fx) - (result) (digital audio signal) - (apply fx) - (record) - (playback) - (result) I'll add a note that

Re: [LAD] MIDI in jack

On Mon, Jul 7, 2014 at 5:00 PM, Flávio Schiavoni f...@rendera.com.br wrote: I'm asking it to try to help with your other doubt involving Jack MIDI or ALSA MIDI. Here goes my 3 cents. If you need to run it with sudo, maybe the best approach is to divide the system in a client / server

Re: [LAD] C++ guide

Hey Will, This really depends: are you asing about refactoring the code-structure (classes, inheritance, is-a vs. has-a owenership etc) or actual code in the sense of stl vectors and refactoring actual useful code as I see it :) For basics of C++ std libs etc, I generally refer to these:

[LAD] Help Offered : NSM Implementation

Hey *, I'd like to inform the linux-audio-developers / community that I offer my assistance to developers in supporting the NSM session-management system. Its a low-overhead (OSC library environment variable only) session management system, and its working well for a large majority of users.

Re: [LAD] Input/output error alsa api

Rt audio and poet audio are different projects. For RtAudio, there are 2 CPP files that you compile into your code : no linking library just yet. When you want jack / salsa support, you add the appropriate #define, and link to the libs needed by that output framework. Check the RtAudio page for

Re: [LAD] Input/output error alsa api

Hi Thiago, Slightly other question: are you *sure* you want to write directly using the ALSA API? Generally, writing a JACK[1] client (for linux-pro-audio use-cases), or RtAudio[2] is a better idea, and easier in my opinion... They're easier to write to, and abstract away some of the details of

[LAD] OpenAV ArtyFX 1.1 Release

Hey All, It's my pleasure announce that ArtyFX 1.1 is released! See the ArtyFX page for details on the 3 new plugins: http://openavproductions.com/artyfx/ Source available from github: https://github.com/harryhaaren/openAV-ArtyFX/releases And many thanks to the contributors! -Harry

Re: [LAD] Releasing source code is not enough, I think...

On Tue, Jan 21, 2014 at 3:34 PM, Filipe Coelho fal...@gmail.com wrote: On 01/21/2014 12:40 PM, Fons Adriaensen wrote: They can learn to do it [compile software, -Harry]. It's not rocket science. I think it's not up to the users to understand how software compilation works. I feel this is an

Re: [LAD] Calling all developers

On Mon, Dec 23, 2013 at 5:05 PM, Gabbe Nord gabbe.n...@gmail.com wrote: I'd greatly appreciate any participation from developers. On behalf of OpenAV I've completed it. Thanks for taking the initiative and making this happen. To an interesting and productive discussion! -Harry

Re: [LAD] Luppp - disable sync'ed start

I've created a github issue for this discussion, to avoid software-specific discussion to LAD: https://github.com/harryhaaren/openAV-Luppp/issues/67 Lets continue the discussion there :) Cheers, that's a nice piece of software ! Thanks, -Harry ___

[LAD] OpenAV : Luppp release!

Hey All, I'm delighted to say that 5 days after announcing, Luppp has reached its target donation! That means that its now available under the GPLv3+ license, to everybody! Grab the details source from here: http://openavproductions.com/luppp I'd like to thanks the community, for the awesome

[LAD] OpenAV : Luppp Announced!

Hey! Its my pleasure to announce Luppp, the flagship project of OpenAV! Announce video: https://www.youtube.com/watch?v=AcIuKktCaLg Its a live-looping program with a grid based workflow. This the Luppp has features like NSM integration, ArtyFX integration, JACK integration, and powerful MIDI

Re: [LAD] Looking for library to categorise audio

On Sun, Oct 13, 2013 at 9:49 PM, Philipp Überbacher mu...@tuxfamily.org wrote: I'm looking for a library that I could use to categorise audio. Do you know or even have experience with such a library? Aubio, and the VAMP plugins would be where I'd start. Aubio has beat-onset, and BPM etc, some

[LAD] OpenAV : ArtyFX

Hey All, ArtyFX is released after 5 days, cheers to all the contributors! Checkout details here: http://www.openavproductions.com/artyfx Cheers, -Harry ___ Linux-audio-dev mailing list Linux-audio-dev@lists.linuxaudio.org

Re: [LAD] LV2 Oscilloscope

On Thu, Oct 10, 2013 at 6:29 PM, Aurélien Leblond blabl...@gmail.comwrote: - what is the cleanest way to access input port data from the GUI? In short: the DSP part should write an Atom event to notify the GUI. The long: Ardour3 deletes UI instances when the window is closed: that means the

Re: [LAD] LV2 Oscilloscope

On Thu, Oct 10, 2013 at 8:07 PM, Paul Davis p...@linuxaudiosystems.comwrote: If a plugin uses one of them (the original) then Ardour will NOT delete the UI instance when it is closed. If a plugin uses the other (the version forked/copied by falktx) then Ardour WILL delete the UI instance

[LAD] Community Interaction and Working Together

Hello all Users Devs of linux-audio-land, Moving forward from the topic on Aeolus and forking projects, perhaps it is wise to look at how the community as a whole can grow from this situation: 1) It seems the frustration of forks is mainly due to lack of communication. 2) Had appropriate

Re: [LAD] Community Interaction and Working Together

On Fri, Sep 20, 2013 at 11:38 AM, Ralf Mardorf ralf.mard...@alice-dsl.netwrote: Harry, could you please post some links, when you have seen the frustration you're talking about? I'd much prefer focus on improving from where we are: not highlighting where communication may have broken down.

Re: [LAD] Community Interaction and Working Together

On Fri, Sep 20, 2013 at 1:26 PM, Ralf Mardorf ralf.mard...@alice-dsl.netwrote: The way things are saved and restored for Qtracor is a real PITA and that it seems to be impossible to cancel changes, when leaving an editor. I see a QTractor feature request / bug report coming...

Re: [LAD] forking (was Re: Aeolus)

On Fri, Sep 20, 2013 at 1:25 PM, Dan Muresan danm...@gmail.com wrote: There's also the fact that you can't attach patches to github issues. https://gist.github.com/ can be used for this: see https://github.com/ned14/Easyshop/issues/1 -Harry PS: Apologies for the blank mail

[LAD] OpenAV : Sorcer 1.1 release

Hey everybody, OpenAV is releasing Sorcer 1.1! Upgraded features such as a compressor and output level provide better feedback in an all new NTK based UI! Existing presets are remain unchanged: the compressor is off by default. Packagers will be happy to know that Sorcer now uses Make, so

[LAD] OpenAV Realtime Buffer Allocation article

Hey All, I've written up a blog post on allocating (audio) buffers in real-time. The trigger was designing the record functionality for Luppp. http://openavproductions.com/realtime-buffer-allocation Hope its of interest to some, -Harry ___

Re: [LAD] Screencasting with JACK [SOLVED!]

On Fri, Aug 9, 2013 at 2:54 AM, J. Liles malnour...@gmail.com wrote: Well, it took a couple of weeks of hair pulling and many, many hours of testing, but I finally arrived at a solution. Brilliant stuff, most definatly will test after my mini-holiday till Monday. Expect feedback of some sort :)

[LAD] OpenAV Fabla

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 ___ Linux-audio-dev mailing

[LAD] DSP: Band limiting wavetable oscillator

Hi all, I'm working on a wavetable oscillator class, and I'm wondering about how to best go about bandlimiting. I see two ways to achieve bandlimiting, i'll detail as A and B. A) Create different wavetables for each octave. Base octave includes all harmonics. Octave 1 has the top half of the

Re: [LAD] DSP: Band limiting wavetable oscillator

On Sat, Jul 13, 2013 at 5:32 PM, Fons Adriaensen f...@linuxaudio.org wrote: This could be done very efficiently, in particular if you accept some compromises for the lowpass filter, and even more if the waveforms can be summed before downsampling. Good idea, I wouldn't have thought of summing

[LAD] OpenAV : Fabla

Hey everybody, Its my pleasure to announce that the next OpenAV Productions LV2 plugin is finished! Its called Fabla, and its a performance sampler. Page: http://openavproductions.com/fabla Demo reel: https://vimeo.com/70122957 One year from today Fabla will be released, and each donation

Re: [LAD] Linux Audio Architecture

On Wed, Jun 12, 2013 at 8:10 PM, ssm salmin01...@gmail.com wrote: I know it's a long post, but even if you can help with a part of it, I'll be greatly benefited. Hi Salmin, You are using the ALSA API directly: if you're *sure* you want to do that, disregard the next bit. Most pro-audio

[LAD] OpenAV Productions : Sorcer Release

Hi everybody! Its my pleasure to announce, that after 9 days the Sorcer wavetable synth's donation target has been reached. Not only that, but as I prepared to push the code to github, not one but two more donations arrived. Wauw. Thank you for kicking off OpenAV productions. Now for the best

[LAD] OpenAV Productions : Sorcer

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

Re: [LAD] Faust site down.

On Mon, Apr 15, 2013 at 1:23 AM, J. Liles malnour...@gmail.com wrote: To whom it may concern, http://faust.grame.fr is down. And its back up :) Announcements of server up-down time are made on the faudiostream-users mailing list:

Re: [LAD] jack ringbuffer usage

On Mon, Apr 8, 2013 at 12:45 PM, Raphaël BOLLEN raphael.bol...@mobistar.be wrote: error: invalid conversion from 'void*' to 'char*' [-fpermissive] jack_ringbuffer_read() expects the buffer pointer to be of type char* not void*. The char* should just be interpreted as pointer, as the data is

Re: [LAD] jack ringbuffer usage

On Mon, Apr 8, 2013 at 1:01 PM, Raphaël BOLLEN raphael.bol...@mobistar.bewrote: Hi Harry, thanks for the information. Your welcome! I'm intrested in what kind of JACK program you're working on..? Also I'm collecting example / tutorial code for JACK programming, perhaps its of intrest to you:

Re: [LAD] Python Non-Session-Manager Client Module (version 0.1)

Ah very cool. I'm not using python, but might implement a class / some C++ code when I get time for the same purpose. Hooks on OSC commands to do / tell to do the NSM stuff... On Thu, Apr 4, 2013 at 1:22 AM, Nils Gey i...@nilsgey.de wrote: Dear Developers, I've written a convenience

Re: [LAD] Python Non-Session-Manager Client Module (version 0.1)

On Thu, Apr 4, 2013 at 7:19 PM, J. Liles malnour...@gmail.com wrote: Harry, this already exists in C++ class form and also in a single C header file. nonlib/NSM/Client.{CH} and nonlib/nsm.h, respectively. Brilliant, thanks for the pointer. I've not played with implementing NSM yet, but its

Re: [LAD] Mixing audio: Noiseless volume changes

On Tue, Mar 19, 2013 at 1:02 PM, Fons Adriaensen f...@linuxaudio.orgwrote: The code below will do the trick Brilliant, thanks for sharing. Will be implementing learning from this later, appreciated! -Harry ___ Linux-audio-dev mailing list

Re: [LAD] Mixing audio: Noiseless volume changes

On Mon, Mar 18, 2013 at 11:45 PM, Fons Adriaensen f...@linuxaudio.orgwrote: A critically damped second order lowpass with a rise time of 30 ms or so will eliminate all audible artefacts. It's very low on CPU and you only need to run it while the gain is changing. Although I understand the

Re: [LAD] Mixing audio: Noiseless volume changes

On Tue, Mar 19, 2013 at 3:26 AM, Tim Goetze t...@quitte.de wrote: tradition (like RBJ's lovely cookbook at musicdsp) will ask for filter Q, which is 0.5 for critical damping. Nice mention, checked out the code there, will play around with it a bit :)

Re: [LAD] Bitwig beta for Linux reviewed

On Wed, Mar 6, 2013 at 12:05 PM, Dave Phillips dlphill...@woh.rr.comwrote: http://www.linux-community.de/Internal/Artikel/Print-Artikel/LinuxUser/2013/01/Bitwig-Professionelle-Musik-Workstation-fuer-Linux Excellent review, in German only, with some enticing screenshots. Thanks for the link,

Re: [LAD] JACK and CPU stress testing

Hi everybody! Rui: nice graphs, definatly using that one :D Dominique: I've not tried your suggestion yet. Perhaps later if I have time. Adrian: Hah, the brute force method. Will give it a go and see what happens Robin: I'll have a look at the scripts, and see if inspiration strikes ;) Thanks

[LAD] JACK and CPU stress testing

Hey all, I'm currently attempting to stress test my setup of -rt kernel, rtirq scripts, and a Jack client program I've been working on. So my idea is to create a script that runs the programs, and also a cpu-load generating program (cpuburn or alternative). Then collecting stats based on Xruns,

Re: [LAD] making sense of Jack MIDI; or, is this an appropriate use for Jack?

On Sun, Feb 17, 2013 at 3:57 AM, M Donalies ingeniousnebb...@cox.netwrote: No locks or mutexes in a callback function. I need to think about that one. This is indeed a lovely topic for debate. I'm bound to say that, I'm currently doing a final-year project for college on the topic. I've came up

Re: [LAD] making sense of Jack MIDI; or, is this an appropriate use for Jack?

On Sun, Feb 17, 2013 at 9:20 PM, Paul Coccoli pcocc...@gmail.com wrote: This scheme sounds error prone. In general, copying C++ objects via memcpy (or writing them 1 byte at a time into the ringbuffer, which is what I think you're proposing) is a bad idea. Nope, write them one sizeof(

Re: [LAD] making sense of Jack MIDI; or, is this an appropriate use for Jack?

On Sun, Feb 17, 2013 at 9:20 PM, Paul Coccoli pcocc...@gmail.com wrote: JACK ringbuffers are ideally suited to passing simple types (like floats), and not vairable sized things (like different derived Event classes). Your enum for event types is a bit of a red flag, too. While its perfectly

Re: [LAD] making sense of Jack MIDI; or, is this an appropriate use for Jack?

On Fri, Feb 15, 2013 at 11:41 PM, M Donalies ingeniousnebb...@cox.netwrote: There's no here's how you use these guys sections. Hi M! As a relative new-comer to linux-audio, I struggled with the same issues you're having. I had intended to document my own learning of JACK MIDI, and have a repo

Re: [LAD] So what do you think sucks about Linux audio ?

On Sat, Feb 9, 2013 at 11:16 AM, John Rigg lad...@jrigg.co.uk wrote: I will stress that I'm talking about audio engineering tools, not music creation software here. I do appreciate that users of the latter have very different requirements. I was reading your post, about to vocalize the

[LAD] LV2 Synths Hosts : MIDI binding

Hey all! I have a simple enough question, but I don't know the best practice for solving it, so figured I'd ask. There's an LV2 synth running in a LV2 host. The synth exposes its operation trough control ports. Option 1: The plugin can bind incoming MIDI events to these control ports values,

Re: [LAD] Segfault when trying to dereference __midi_event.buffer (c++ newbie question)

On Wed, Nov 21, 2012 at 11:54 AM, Shani Hadiyanto Pribadi shaniprib...@gmx.net wrote: jack_midi_event_get(in_event, midi_buf, event_index); if ((*(in_event.buffer) 0xf0) == 0x90) // Segfault happens here, on boolean mask operation { _note = *(in_event.buffer + 1); } Extra context

Re: [LAD] FAUST 0.9.58 released

On Fri, Nov 9, 2012 at 2:26 PM, Orlarey Yann orla...@grame.fr wrote: snip is happy to announce the release of FAUST 0.9.54 /snip Great news! I noticed the LV2 output option on the online compiler, the rest of the news is great too! ___

Re: [LAD] About some interface of aplay

On Fri, Oct 19, 2012 at 9:31 AM, 新月如钩 46620...@qq.com wrote: ** Hi All, Say hello to everyone! Hi Spring! I'm a new member to learn how to write a ALSA application. Is there a reason that you want to learn ALSA specifically? Or do you want to start audio programming in

Re: [LAD] [LAU] Linux Audio 2012: Is Linux Audio moving forward?

Replying to nobody in particular but perhaps bringing some new things to the table: I feel there's a lot going on just-under-the-surface of what most of us know about. I presume not everybody here is aware of the advances FAUST has recently made in DomainSpecificLanguage technology. Similary I'm

Re: [LAD] Pianoteq VST - point of information

On Sun, Sep 2, 2012 at 7:32 PM, Edward Diehl di...@umich.edu wrote: However, if you append _2chan to the plugin library name (e.g. Pianoteq.so to Pianoteq_2chan.so) , the plugin will output only 2 channels and work happily in Ardour. Neat trick, I have Pianoteq and didn't know about it. Of

Re: [LAD] Kontakt sampler format (and others like EXS24)

On Sat, Sep 1, 2012 at 1:34 PM, Emanuel Rumpf xb...@web.de wrote: conclusion: 1. don't use the kontakt sampler (or other proprietary sw) 2. don't buy kontakt samples 3. support free, libre sample libraries 4. create free, libre sample libraries this appears as the most effective stategie

Re: [LAD] Kontakt sampler format (and others like EXS24)

? Standalone? DSSI? LV2? What is necessary to cover 95% of the users? Thanks, Florian On 31.08.2012, at 15:43, Harry van Haaren harryhaa...@gmail.com wrote: On Fri, Aug 31, 2012 at 1:03 PM, Nils l...@nilsgey.de wrote: The direct and naive solution would be a reversed engineered kontakt

Re: [LAD] Kontakt sampler format (and others like EXS24)

On Fri, Aug 31, 2012 at 1:03 PM, Nils l...@nilsgey.de wrote: The direct and naive solution would be a reversed engineered kontakt sample engine, yes. Very naive. The community could approach NI and ask if they're intrested in supporting a Linux version of Kontact? I volunteer to write the

Re: [LAD] Kontakt sampler format (and others like EXS24)

On Fri, Aug 31, 2012 at 4:27 PM, Paul Davis p...@linuxaudiosystems.comwrote: A lot of people (even on this list) don't understand the extent to which *supporting* a piece of software is often a far bigger cost than the initial development, and providing support for a platform with very few

Re: [LAD] Listing lowest and highest frequencies in a track?

I use Fons' JAAA for this. It has a freeze button, so when you hear a low note, you'll see it, then hit freeze, then there's peak analysers that you can place on the display, and it'll tell you its Hz (and estimate a note). dB can be read right off the Y axis. It doesn't analyse the whole song as

Re: [LAD] Wavetable synthesis : Creating fat wavetables

On Fri, Aug 24, 2012 at 11:18 PM, Robin Gareus ro...@gareus.org wrote: Even if you implemented it correctly, overtones or undertones can mislead ones perception quite easily. Indeed: I've not taken a spectrum analyzer to the signal yet: but something feels wierd with it. Will look at the

Re: [LAD] Wavetable synthesis : Creating fat wavetables

On Fri, Aug 24, 2012 at 11:48 PM, Fons Adriaensen f...@linuxaudio.orgwrote: The easiest way in the case of wavetable synthesis is to upsample your waves by a factor of say 8, then use linear interpolation. So the preparation process is: -record the sounds -upsample x8 Live playing:

Re: [LAD] Floating point Denormals: C++ and Waf

On Thu, Aug 2, 2012 at 10:16 PM, Robin Gareus ro...@gareus.org wrote: 1e-20 ( ~= signal at -400db ) should be inaudible enough. Done! Works well. Thanks, it seems that this is the easiest cross-CPU / architecture etc fix, so I'll go with it. Thanks all! Learning bout CPU mechanics is

[LAD] Floating point Denormals: C++ and Waf

Hi all, I've working on a LV2 instrument plugin, and it consumes about 1-2% CPU on idle. When I leave it for about 20 seconds, the CPU usage jumps to 38 / 40 % of a core, and JACK xruns. The code contains IIR's for a reverb effect, so I'm going to blame this CPU burning on denormal values. I'm

Re: [LAD] Floating point Denormals: C++ and Waf

Thanks all for the replies, I've certainly learnt a lot. On Thu, Aug 2, 2012 at 9:11 PM, Tim Goetze t...@quitte.de wrote: I think it's almost always a better idea to add an inaudible DC offset or a square wave at the block interval or at Nyquist How small is inaudible? Or better yet, how

Re: [LAD] AMD C-60 and RT-patch

I'm pretty intrested in this device: http://www.acer.co.uk/ac/en/GB/content/iconia-tab-w500 It runs the C50, and is basically a full 32bit computer, this guy installed Arch on it: http://ant1antuan.wordpress.com/2011/11/10/tablet-acer-iconia-tab-w500-arch-linux-setup-e-first-configuration/

[LAD] Open Audio Programming Tutorials

Hey All, After some very inspiring conversations at the LAC, I have decided to renew the efforts to document linux audio programming for beginners. I feel that although there's a lot of really useful tutorials out there, but there's still a lack of easy accessible introductory audio programming.

Re: [LAD] Open Audio Programming Tutorials

On Fri, May 4, 2012 at 6:07 PM, Harry van Haaren harryhaa...@gmail.comwrote: Announcing: Open Audio Programming Tutorials! https://github.com/harryhaaren/openAudioProgrammingTutorials And the link too this time :) -Harry ___ Linux-audio-dev mailing

  1   2   3   >