Linux-audio-dev

linux-audio-dev@lists.linuxaudio.org

3 participants
7535 discussions

by Patrick Shirkey

On Mon, October 14, 2013 4:08 am, Markus Seeber wrote: > Hi, > i'm not sure, but you could have a look at what he is doing: > > http://mohayonao.github.io/timbre.js/reverb.html > > That is quite a large JavaScript framework, but maybe the right place to > start? > Looks interesting but it doesn't have support for ogg afaict. However I might be able to do something with the examples. Anyone else have any other suggestions? > > Am 10/13/2013 06:58 PM, schrieb Patrick Shirkey: >> Hi, >> >> Can anyone point me to an example for echo/delay/reverb filters using >> html5 audio? >> >> -- Patrick Shirkey Boost Hardware Ltd

12 years, 4 months

[LAD] Call for testing: ALSA driver for Fireworks/BeBoB based devices

by Takashi Sakamoto

Hi all, This is a call for testing my ALSA driver for Fireworks/BeBoB based devices. Please test 'snd-fireworks' for Fireworks and 'snd-bebob' for BeBoB if you have some devices listed in the end of this mail. Status: - still under development - Without snd-dice and Clemens' development (I must do this later) Functionality: - playback/capturing (full duplex) with PCM/MIDI interface - hardware metering for some devices with CONTROL interface - switching clock source/digital interface/digital mode with CONTROL interface - print hardware status with PROC interface Note: - Don't use simultaneously 'ALSA PCM/MIDI playback/capture' and 'jackd with Firewire (FFADO) backend'. Both of them try connecting to the device when another is running. - I add much modification into snd-firewire-lib for full duplex synchronization of receive/transmit AMDTP stream. Requirement: - Linux kernel 3.11 or later because of Juju (nickname of Firewire stack) changing its API. - Dynamic Kernel Module Support (DKMS) is reccomended for safely installing/uninstalling (I work with Ubuntu 13.10) Bug report: - report with /proc/asound/cardX/#XXX - please send your experiences to me with the output How to install (DKMS): 1. $ git clone https://github.com/takaswie/snd-firewire-improve.git 2. $ ln -s $(pwd)/snd-firewire-improve/ /usr/src/alsa-firewire-3.11 (superuser) 3. $ dkms install snd-firewire/3.11 (superuser) How to uninstall (DKMS): 1. $ modprobe -r snd-bebob snd-fireworks snd-firewire-lib (superuser) 2. $ dkms remove ans-firewire/3.11 --all (superuser) 3. $ rm /usr/src/alsa-firewire-3.11 (superuser) 4. $ rm snd-firewire-improve How to install (Manual): 1. $ git clone https://github.com/takaswie/snd-firewire-improve.git 2. $ cd snd-firewire-improve 3. $ make 4, backup system snd-firewire-lib/snd-firewire-speakers/snd-isight (superuser) 5. install snd-firewire-lib/snd-firewire-speakers/snd-isight/snd-fireworks/snd-bebob (superuser) 6. depmod -a (superuser) How to uninstall (Manual) 1. modprobe -r snd-firewire-lib snd-firewire-speakers snd-isight snd-fireworks snd-bebob (superuser) 2. remove snd-firewire-lib/snd-firewire-speakers/snd-isight/snd-fireworks/snd-bebob (superuser) 3. recover snd-firewire-lib/snd-firewire-speakers/snd-isight (superuser) 4. depmod -a (superuser) Confirmed to work: - AudioFire4 - AudioFirePre8 - Ozonic - Firewire Solo - Firewire Audiophile - Firewire 410 == Fireworks based devices [Echo Audio] AudioFire2 AudioFire4 AudioFirePre8 AudioFire8 (till 2009) AudioFire8 (since 2009) AudioFire12 [Gibson] RIP [Mackie] Onyx 400F Onyx 1200F == BeBoB based devices [Yamaha] GO44 GO46 [M-Audio] (to control mixer channels please use FFADO upstream) Ozonic Firewire 410 Firewire Audiophile Firewire Solo NRV10 ProFireLightbridge [Focusrite] SaffirePro 26 I/O SaffirePro 10 I/O Saffire(LE) [Edirol] FA-66 FA-101 [TerraTecElectronic GmbH] Phase88FW PhaseX24FW [PreSonus] FireBox FirePod [Mackie] OnyxFirewire [Tascam] IF-FW/DM [Behringer] X32 [ApogeeElectronics] Rosetta200 [ESI] Quatafire610 Regards Takashi Sakamoto o-takashi(a)sakamocchi.jp

12 years, 4 months

[LAD] LV2 Oscilloscope

by Aurélien Leblond

> I would just bypass the LV2 host altogether and use shared memory to get > the audio data to the GUI. > ...and use the same mechanism to send the sample rate. That's through Instance-Access right? That's exactly what I want to avoid - this plugin is meant to be used in Ingen and Ingen doesn't support this. > LV2 UIs can get the sample-rate using the options extension. > Hosts will set the appropriate option lv2param:sampleRate which the UI > can get on initialization. I tried that but without success. I'm using the LVTK library to develop this plugin. My approach is to: - use the get_supplied_options() method to access the host supplied options - iterate until I find SampleRate problem is get_supplied_options() returns 0 options when called from the UI. Any advice? Aurélien

12 years, 4 months

[LAD] html5 audio filters

by Patrick Shirkey

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

12 years, 4 months

[LAD] 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).

12 years, 4 months

[LAD] 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 | '---------------------------------------------------------------------'

12 years, 4 months

[LAD] 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

12 years, 4 months

[LAD] 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

12 years, 4 months

[LAD] 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

12 years, 4 months

[LAD] 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?

12 years, 4 months

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Linux-audio-dev