>
>> 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)
>>
>> Basically what happens is when i have a buffersize of 8192 and a
>> period of 32 is that snd_pcm_avail_update(capture_handle), will keep
>> returning 0 until i have played back the full 8192 samples. After
>> that I will start receiving input samples, but obviously the latency
>> is now more than 8182 samples…
>>
>> How can i make alsa not wait until the entire buffer is full?
>
> maybe that's $GOD's way of telling you to use jack?
> jokes aside, why not profit from the flexibility of jack when it doesn't have any real disadvantages?
Well i might have to go that way if i can’t work this out. But i would prefer to use alsa directly if possible. The reason for me not to use jack, is not that there is anything wrong with it, on the contrary. The reason is just that it doesn’t make sense in my case, i don’t need any inter-app routing for this project, and it would just be another dependency. Adding jack to the mix doesn’t seem like the right solution to the actual problem...
> with that kind of i/o, i doubt you're doing some tightly constrained embedded project :-]
>
it makes for a very nice delay actually :-)
fokke
> --
> Jörn Nettingsmeier
> Lortzingstr. 11, 45128 Essen, Tel. +49 177 7937487
>
> Meister für Veranstaltungstechnik (Bühne/Studio)
> Tonmeister VDT
>
> http://stackingdwarves.net
>
On Wed, Feb 3, 2016 at 10:10 PM, Harry van Haaren <harryhaaren(a)gmail.com>
wrote:
> OpenAV will be doing a workshop on Fabla2
Harry, you beat me to it. :)
My proposal is a workshop with a practical introduction to Faust plugin
programming. Please check
http://minilac.linuxaudio.org/index.php/Workshop#Workshop_:_Plugin_Programm…
for my blurb.
David, thanks so much again for pulling this off. I'm sure that this will
be a great event and I'm really looking forward to it! :)
Albert
--
Dr. Albert Gr"af
Computer Music Research Group, JGU Mainz, Germany
Email: aggraef(a)gmail.com
WWW: https://plus.google.com/+AlbertGraef
Ahoy there!
Qtractor 0.7.4 (the tackiest gluon) has been released!
Y'all know the drill...
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.
Change-log (since last release):
- Eye-candy warning: muted/non-soloed tracks are now shaded over the
main thumb-view.
- Faster and crispier VST plugin editor (GUI) idle cycles.
- Fixed all core processing when any plugin has more audio outputs than
channels on a track/bus where it's inserted.
- Added one decimal digit to all percentage input spin-boxes on the MIDI
Tools dialog.
- Added brand new and global option to disable the so called "catch-up"
default behavior (cf. View/Controllers.../Sync).
- Fixed some track control issues related to MIDI Controllers generic
mapping (cf. View/Controllers...).
- Try making Help/Shortcuts... dialog window modeless, as far as under
MIDI Controller, Inputs/Outputs Connections window also gets accessible
enough.
- Fixed some vertical scrolling and play-head line re-drawing glitches
introduced by the recent unlimited slack to editing beyond current
contents length on main tracks view.
- Added one decimal digit to the Pitch-shift spin-box on audio
Clip/Edit... properties dialog window.
- Added application keywords to freedesktop.org's AppData.
- Fixed local keyboard shortcuts on the Files organizer widget actions
and context-menu.
- Improved Mixer multi-row layout (patch by Holger Marzen aka. bluebell,
thanks).
- Fixed the Ctrl+drag/cloning left of a clip when towards near the
beginning of session.
Website:
http://qtractor.sourceforge.net
Project page:
http://sourceforge.net/projects/qtractor
Downloads:
http://sourceforge.net/projects/qtractor/files
- source tarball:
http://download.sf.net/qtractor/qtractor-0.7.4.tar.gz
- source package (openSUSE Tumbleweed):
http://download.sf.net/qtractor/qtractor-0.7.4-22.rncbc.suse.src.rpm
- binary packages (openSUSE Tumbleweed):
http://download.sf.net/qtractor/qtractor-0.7.4-22.rncbc.suse.i586.rpmhttp://download.sf.net/qtractor/qtractor-0.7.4-22.rncbc.suse.x86_84.rpm
- wiki (on going, help still wanted!):
http://sourceforge.net/p/qtractor/wiki/
Weblog (on going, upstream support):
http://www.rncbc.org
License:
Qtractor [1] is free, open-source Linux Audio [5] software,
distributed under the terms of the GNU General Public License (GPL [6])
version 2 or later.
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] Linux Audio consortium of libre software for audio-related work
http://linuxaudio.org
[6] GPL - GNU General Public License
http://www.gnu.org/copyleft/gpl.html
See also:
http://www.rncbc.org/drupal/node/1000
Enjoy && Have (lots of) fun ;)
--
rncbc aka. Rui Nuno Capela
All,
The migration should be now complete. Please let us know if you
encounter any problems.
Best,
Ico
On 1/26/2016 11:12 PM, Ivica Ico Bukvic wrote:
> All,
>
> As some of you may be already aware, this past December I was notified
> our current virtual server that hosts a broad array of outreach
> services, including these mailing lists, will be decommissioned at the
> end of this month. Since, I've been working on securing the
> infrastructure and ongoing support onto a brand new physical blade. I
> am pleased to report we are at the very end of what has proven to be a
> fairly intense journey (needless to mention I learned a lot more than
> I ever wanted to about sysadmin). Our new setup is considerably more
> powerful and I am confident it will offer a significant improvement in
> performance over the old one. As we enter the final stage in the
> porting process, there will be a brief downtime tentatively scheduled
> for 11am Eastern Time (East US Coast) tomorrow, Wednesday, January
> 27th. During this time, you will experience inability to access hosted
> services, including web and mailing lists. My intent is to have the
> transition complete as quickly as we can do the final rsync and IP
> address reconfiguration. I will let you know as soon as we've
> completed this final step. Thank you for your support and understanding.
>
> Best,
>
>
All,
As some of you may be already aware, this past December I was notified
our current virtual server that hosts a broad array of outreach
services, including these mailing lists, will be decommissioned at the
end of this month. Since, I've been working on securing the
infrastructure and ongoing support onto a brand new physical blade. I am
pleased to report we are at the very end of what has proven to be a
fairly intense journey (needless to mention I learned a lot more than I
ever wanted to about sysadmin). Our new setup is considerably more
powerful and I am confident it will offer a significant improvement in
performance over the old one. As we enter the final stage in the porting
process, there will be a brief downtime tentatively scheduled for 11am
Eastern Time (East US Coast) tomorrow, Wednesday, January 27th. During
this time, you will experience inability to access hosted services,
including web and mailing lists. My intent is to have the transition
complete as quickly as we can do the final rsync and IP address
reconfiguration. I will let you know as soon as we've completed this
final step. Thank you for your support and understanding.
Best,
--
Ivica Ico Bukvic, D.M.A.
Associate Professor
Creative Technologies in Music
ICAT Senior Fellow
Director -- DISIS, L2Ork
Virginia Tech
School of Performing Arts – 0141
Blacksburg, VA 24061
(540) 231-6139
www.performingarts.vt.edudisis.music.vt.edul2ork.music.vt.eduico.bukvic.net
Is anyone here using ccmake version 3.4.1?
I've had a couple of people saying it segfaults when going through its setup.
I'm using V 3.0.2 and not seeing any problems at all.
--
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.
Hello there and again,
This time getting ready for the NYE. Prepare to party, the countdown has
begun... but first, let there be just one cheesier announcement ;o)
Qtractor 0.7.3 (a tackier gluon) is released!
Everyone is strongly invited to upgrade. No excuses.
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.
Change-log (since last cheesy release):
- Slight increase on the number of decimal digits for the plugin
parameters while on the generic plugin properties dialog. Also applied
to automation curve node value editing.
- Unlimited slack is now in effect on editing over and beyond the
current session or clip contents length, on both the main tracks and
MIDI clip editor (piano-roll) views.
- Ctrl+click and dragging the left or right edges of a clip will now
make it spill over and replicate as many clip clones as it fits in the
left or right horizontal extent.
- Added View/Note Type and Value Type command menus to the MIDI clip
editor (aka. piano-roll) which opens the possibility for discrete
shortcuts to switching views eg. Note Velocity and Controller views
(after a kind request by yubatake, thanks).
- Fixed the conversion and/or override of MIDI clip offsets when moving
and copy/pasting across tempo/time-signature changes.
- Fixed MIDI file track/channel duration estimator, which was giving
quite wrong and way too short reads.
- Fixed a drag-and-drop bug over the main tracks view, when new tracks
were being inserted at the top and not to the bottom as is normally
indicated by the floating visual placeholder.
- Fixed LV2UI_Resize handle from extension_data(LV2_UI__resize), now
passing LV2UI_Handle in first argument to ui_resize(), as found correct
and needed for resizable/scaleable LV2 UI's, most specially to ssj71's
so called Infamous Plugins, thanks.
Website:
http://qtractor.sourceforge.net
Project page:
http://sourceforge.net/projects/qtractor
Downloads:
http://sourceforge.net/projects/qtractor/files
- source tarball:
http://download.sf.net/qtractor/qtractor-0.7.3.tar.gz
- source package (openSUSE Tumbleweed):
http://download.sf.net/qtractor/qtractor-0.7.3-21.rncbc.suse.src.rpm
- binary packages (openSUSE Tumbleweed):
http://download.sf.net/qtractor/qtractor-0.7.3-21.rncbc.suse.i586.rpmhttp://download.sf.net/qtractor/qtractor-0.7.3-21.rncbc.suse.x86_84.rpm
- wiki (on going, help wanted!):
http://sourceforge.net/p/qtractor/wiki/
Weblog (on going, upstream support):
http://www.rncbc.org
License:
Qtractor [1] is free, open-source Linux Audio [5] software,
distributed under the terms of the GNU General Public License (GPL [6])
version 2 or later.
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] Linux Audio consortium of libre software for audio-related work
http://linuxaudio.org
[6] GPL - GNU General Public License
http://www.gnu.org/copyleft/gpl.html
See also:
http://www.rncbc.org/drupal/node/989
Enjoy && Happy New Year.
--
rncbc aka. Rui Nuno Capela
Another new release of mcpdisp, a Mackie Control display emulator. This is
meanto to sit on the screen below a DAW or other program that has a
hardware Surface to control it such as the BCF2000 which has no scribble
strips, meters or timecode display to add that functionality.
0.0.6 brings:
- Added -x and -y command line arguments for window placement.
- Added a Thru port so only one input needs to connected to daw.
This helps on DAWs that use a dropdown that only allows connecting
to one MIDI port.
- Changed port names to match client name for applications that only
show the port name to save space.
- Accept sysex version of time as well (not tested). I don't have a DAW
that sends the time as a sysex string, but it is in the standard.
- Fixed a bug where some midi events may be skipped or mutilated. I
didn't actually see this happen, but it could in theory.
The home page is:
http://www.ovenwerks.net/software/mcpdisp.html
Download on there is just a link to:
https://github.com/ovenwerks/mcpdisp
Comments and bugs welcome.
Enjoy.
--
Len Ovens
www.ovenwerks.net
Hi guys,
I'm looking for a program which can act as a Jack transport *and* time
master.
It should feature : set tempo/bar
- save /load profiles (primarily tempo )
- the profiles should be easily accessable and load fast (for live
gigs/switching between songs)
nice to haves:
- metronome
- midi controllable (program change for loading profiles)
- if possible constrained only to these features
I've been using ardour live as time master, but it takes toooo long to
load projects (15s-30s, that breaks the flow of a gig!).
Hydrogen loads faster but it messes up time sync when using sooperlooper
as slave. (SL works fine with ardour).
Thanks, Gerald/JimsonDrift
If I have a buffer size of 256 and always use a 4 byte data block, can I be
confident that reads and writes will either transfer the correct number
of bytes or none at all?
--
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.
