Linux-audio-dev

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4 participants
7502 discussions

by Patrick Shirkey

Hi, Can anyone point me to an example for echo/delay/reverb filters using html5 audio? -- Patrick Shirkey Boost Hardware Ltd

11 years, 8 months

Some proposals for fluidsynth and qsynth

by Zlobin Nikita

Hello community. First, have to note, that i'm not sure, what fluidsynth backend is best today, as first time i got it, was several years ago when i tried ubuntustudio (even simpler - just installed pro-media software to Ubuntu 7.04) and when ubuntu 10.04 released and even 12.04, i still suppose using of qsynth, since i don't now others with such full amount of settings. Now proposals. 1 - optional feature (i.e. with switch to disable it) to publish fluidsynth engines as dbus or other kind of services, exactly like what jack already has. If such option is enabled by default, then even when engine is loaded via linked library, as done in MuseScore, it still may be controlled by external gui like QSynth. Also, another example of such way is linuxsampler way (limited, because qsampler only allowes to change backend addess in settings, but hope it is to be fixed). 2 - only about gui at all, not only qsynth: i read one time somewhere, that fluidsynth supports microtonality (scale tuning), but only few months ago could try it in action, controlling manually standalone fluidsynth, started in terminal. It would be great to add in qsynth panel like in zyn/yoshimi for scale tuning. Also interested, is there some gui, where scale tuning is implemented (hard even to hope when even most featureful gui doesn't have it).

11 years, 8 months

ANN: Audiality 2 now on GitHub

by David Olofson

Audiality 2 is now hosted on GitHub! ------------------------------------ Figured it's about time to make an announcement, now that it's been on there for a few weeks... ;-) Overview: Audiality 2 is a realtime audio and music engine, primarily intended for video games. While it supports traditional sample playback as well as additive, subtractive and granular synthesis, the distinctive feature is subsample accurate realtime scripting. Some of the changes since 1.9.0: * Subvoice spawn and event timing fixed - now truly subsample accurate! (For granular synthesis etc.) * Added generic stream API for wave uploading, audio streaming etc. * 'filter12' no longer blows up at high cutoffs. * 'filter12' supports 2 channels/dual channel mode. * More accurate pitch control in 'wtosc'. * More logical unit autowiring: Now wires outputs to any inputs down the chain by default; not just the next unit. * 'run' statement removed. * Comma as a statement delimiter now deprecated. Next few upcoming changes: * Command line player. * Boolean and comparison operators. * Normalize, crossfade and reverse mix processing for wave uploads. * Render-to-wave, for creating complex waves. * Buffered taps/inserts, for easy implementation of GUI oscilloscopes and the like without realtime callbacks. Official site: http://audiality.org/ GitHub: https://github.com/olofson/audiality2 Related; Kobo II site: http://kobo2.net/ -- //David Olofson - Consultant, Developer, Artist, Open Source Advocate .--- Games, examples, libraries, scripting, sound, music, graphics ---. | http://consulting.olofson.net http://olofsonarcade.com | '---------------------------------------------------------------------'

11 years, 8 months

OpenAV : ArtyFX

by Harry van Haaren

Hey All, ArtyFX is released after 5 days, cheers to all the contributors! Checkout details here: http://www.openavproductions.com/artyfx Cheers, -Harry

11 years, 8 months

LV2 Oscilloscope

by Aurélien Leblond

Hi all, I'm still trying to improve the avw.lv2 plugin set (reminder, the port of AMS internal modules), and one of the new plugin I would like to have is a visual oscilloscope - it's very useful when working with modular synth to see what the Osc/LFO are at. At the moment i'm using the DSSI ll-scope but although it works very well for low frequencies, the refresh rate is not that great for very high frequencies - half the graph is not displayed and if I setting it in frozen mode doesn't work that great for Osc/LFO that changes shape with time. My plan was to use the ll-scope gtk widget, add it to a LV2 plugin and start from there. The problem I'm at the moment facing is this: - ll-scope widget requires the sample rate as a constructor but I can't find an easy way for an LV2 plugin to pass the sample rate. - what is the cleanest way to access input port data from the GUI? GUI and plugin are very well separated in LV2, I can't figure out what's the proper way to do this. Thanks in advance for everyone's help :) Aurélien

11 years, 8 months

io GNU/Linux... new iso uploded :)

by MK aka El Doctor

Hi :) I'm glad to share with you a new iso of "io GNU/Linux", a live dvd/usb focused on multimedia and based on Debian Sid. Kernel 3.11, Jack2 as default sound server, e17+ecomorph as desktop environment and more nice stuff ;) -> http://manu.kebab.free.fr/io.gnu.linux-v2/io-live-hybrid-686-pae--2013.10.0… To create a bootable USB stick please refer to: -> http://live.debian.net/manual/3.x/html/live-manual/the-basics.en.html#186 For more infos, screenshots gallery, video etc... Please visit: -> http://manu.kebab.free.fr/iognulinux.html -> https://sourceforge.net/projects/io-gnu-linux/ Enjoy :) MK

11 years, 8 months

A more efficient way to detect INF and/or NAN in a block of samples

by Kjetil Matheussen

I want to detect INFs and NANs in my DSP graph to avoid having them spread and cause various trouble. Here is the straight forward way: int i; for (i=0;i<num_samples;i++) if (!isfinite(samples[i])) break if(i!=num_samples) error(); But is this as efficient as we get it? I'm wondering if comparing samples using for instance SIMD instructions, for instance, could make it around 4 times faster, Something like this: for(i=0;i<num_samples;i++) if(samples[i]!=samples[i])) break; where the samples[i]!=samples[i] test would succeed if it was a nan or inf, since INFs and NANs don't behave normally. I don't think this particular example works though (?), but perhaps something similar could? Anyone doing something like this?

11 years, 9 months

[ANN] Qtractor 0.5.11 - The Lima Oscar release!

by Rui Nuno Capela

As falling leaves drift by the window, and without any further ado: Qtractor 0.5.11 (lima oscar) is now released! Soon we'll hear a new winter's song. This code-naming series, which started on a sunny summer day two years ago as TYOQA, is now converging to an end. It will be no surprise for some that today's release precedes the very last one on that series. So let's get those autumn leaves falling and grab them while they're crispy red and gold ;) Release highlights: * Extended automation curve editing (NEW) * Extended clip selection (NEW) * LV2 UI resize feature support (NEW) * Aux-sends to audio buses (FIX) * MIDI editor overlapped event velocity/value (FIX) * Accidental export muting and/or freezing (FIX) Website: http://qtractor.sourceforge.net Project page: http://sourceforge.net/projects/qtractor Downloads: http://sourceforge.net/projects/qtractor/files - source tarball: http://downloads.sourceforge.net/qtractor/qtractor-0.5.11.tar.gz - source package (openSUSE 12.3): http://downloads.sourceforge.net/qtractor/qtractor-0.5.11-8.rncbc.suse123.s… - binary packages (openSUSE 12.3): http://downloads.sourceforge.net/qtractor/qtractor-0.5.11-8.rncbc.suse123.i… http://downloads.sourceforge.net/qtractor/qtractor-0.5.11-8.rncbc.suse123.x… - quick start guide & user manual (outdated): http://downloads.sourceforge.net/qtractor/qtractor-0.5.x-user-manual.pdf 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) version 2 or later. Change-log: - Adding a track now inserts it after the current one, if any; one can also drag and move a track below the last one in the track list (main view left pane). - Extended Edit/Select Mode/Automation: multi-selection mode, cut, copy, paste and delete of current track's automation curve nodes, now reached implementation ready status. - Another old silent bug bites the dust: changing track names were dropping any track gain/volume and panning automation curves when saving the session. - A primeval processing bug has been sorted out: aux-sends to audio output buses that just appear to be after the input bus where they're inserted were being left muted and silent (on a ticket follow-up by Holger Marzen, thanks). - Fixed a sure crash bug exposed when processing of aux-send plugins when inserted too early on audio input buses chain (after a ticket report by Holger Marzen, thanks). - Allow the build system to include an user specified CFLAGS (patch by Cristian Morales Vega, thanks). - Shift/Ctrl keyboard modifiers now set to extend current clip selection while in main track view's Edit/Select Mode/Range, Rectangle modes. - Main Edit/Select Mode/Automation icon retouched to look a bit more obvious and intuitive, hopefully ;) - Allow to change the velocities/values of the current selected events which have the exact same onset times and hide beyhond each other on the MIDI clip editor's pane below the main view piano-roll (ie. the one that represents MIDI event values as a bar chart). - Fixed some problematic playback/export muting and annoying cleanup freezing, due on audio tracks with too many clips eg. more than hundred clip splits (hopefully fixes an issue reported by Louigi Verona, thanks). - LV2 UI resize feature support/control added. - Fixed dedicated MIDI control and MIDI metronome port connection restore conflict (thanks to jhammen catch & patch:). - New user preference option added: reverse middle-button role to Shift/Ctrl keyboard state, in special regard to edit-head/tail vs. play-head positioning while on the main track and MIDI clip editor (aka. piano-roll) views. See also: http://www.rncbc.org/drupal/node/710 Enjoy && have (a plenty of) fun. -- rncbc aka Rui Nuno Capela

11 years, 9 months

jackmix-0.5.1

by Dr Nicholas J Bailey

The current state of https://github.com/nickbailey/jackmix represents JackMix 0.5.1. It could probably do with a bit more testing, but couldn't everything? :/ New in this version: rename inputs and outputs post hoc. Order of the inputs and outputs on the GUI is preserved across save/load operations. Nick/. $cat NEWS VERSION 0.5.1 ------------- Added File->Rename Inputs... and File->Rename Outputs... which changes the labels on the GUI, the channel's position and Jack connection name while preserving volume levels etc. There is a video describing the use and motivation behind developing JackMix on Vimeo. See https://vimeo.com/75655401 ...

11 years, 9 months

MIDI Running Status and ALSA, was: [LAU] Launchpad S and Linux

by Kaspar Bumke

On 28 September 2013 22:01, Fons Adriaensen <fons(a)linuxaudio.org> wrote: > If the problem is the same as with the original LP, then > the ALSA driver can't do anything about it, unless it would > contain LP-specific code. > But isn't the problem a general running-status problem if multiple programs are receiving from the same device? Is it a problem with the way the ALSA sequencer works (this seems to ring a bell somehow) as you said in the older thread that using Jack-MIDI would solve it?

11 years, 9 months

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Linux-audio-dev