Hello all,
Some updates on <http://www.kokkinizita.net/linuxaudio/downloads>:
jmeters-0.2.0
- VU-meter scale replaced by a new one which does
not have the -20dB threshold. Now it will also
move for low-level sounds, and fall back much
more naturally.
- PPM now has the same size as VU. Old one still
available as ppm2.
- Added options to set jack client name and update
rate.
- Bugfix for Makefile, PNGs now get installed in
$(PREFIX)/share instead of /usr/share.
aeolus-0.8.1
- Aeolus-0.8.0 added Midi over Jack support but was
announced on the Aeolus list only IIRC. With 0.8.1
it's official.
- Major cleanup and bugfixes.
- Replaces 0.6.6. as the supported release.
ambdec-0.2.0
- Bugfixes, new collection of config files.
MCP-plugins-0.4.0
- Major cleanup (after 5 years or so).
- Added triple chorus. Same as chorus2 but has three
outputs. Pan L,C,R for a nice stereo effect.
clthreads-2.4.0
- Cleanup.
clxclient-3.6.1
- Cleanup.
- Probably fixes a bug that occurs only when running
in KDE (windows not repainting when exposed).
Many thanks to all who contributed by providing feedback,
bug reports and patches.
The two libs and ambdec now also have an OSX Makefile and
the necessary #ifdefs to make them compile. This is very
experimental. I will provide *no* support for this except
to OSX developers who can provide the required technical
feedback.
Ciao,
--
FA
Laboratorio di Acustica ed Elettroacustica
Parma, Italia
Lascia la spina, cogli la rosa.
As a learning exercise, I made a LADSPA plugin that adds its inputs. I
figured it would be reasonable to call such a thing '+'. Some plugin hosts
don't like that (I was less surprised by the ones that could not handle the
name '<'). This is the LADSPA_Descriptor.Label property. ladspa.h says
"Labels must not contain white-space characters.". Is it unreasonable to
expect to be able to have symbols as plugin labels, or parts of plugin
labels? So this is more of a "what do you think" then a right/wrong answer
kind of thing.
Also, though ladspa.h does not say I cannot write my plugin library in such
a way as to create resources shared by all the instances of my plugins
within one host (say, a shared OSC connection?), would that be acceptable?
Would that break hosts? What about per plugin GUI? If I just made a Makefile
variable for a GUI to launch for a ladspa plugin, if I did not want the
overhead of the full DSSI interface (or if I wanted to use the plugin in a
non DSSI compatible host), would that be beyond the pale for a LADSPA
plugin?
Also, now that GMPI seems all but officially dead, does anyone think DSSI
will be supplanted (or "disposed of", as its name would imply)? What is the
general developer feeling regarding LADSPA/DSSI/LV2? I leave VST out of this
list, because I don't think Linux distros can even legally distribute vst.h.
Hi,
Is there a recognized method for calibrating a sound card?
e.g.
For Playback, one sends a sample .wav PCM file to the sound card, then
measure the analog output from the line-out.
If the sound card itself provides 0dB of Gain, what should be the
measured figure?
Can this be done with a simple AC volt meter?
There seems to be some debate, with regards to ALSA, as to whether the
line-out is at the correct level if one sets all the ALSA mixer controls
to 0dB.
James
The first (beta) release of Jmeters is available at
<http://www.kokkinizita.net/linuxaudio/downloads>
Jmeters is a Jack multichannel audio level meter app.
It looks very similar to meterbridge since it uses the
same pixmaps.
This first release offers VU, PPM and stereo versions of the
same. The stereo versions have two indicator needles on the
same scale. I've never seen a twin VU, but stereo (or M/S)
PPMs *do* exist. Later releases will add bargraph meters,
digital peak indicators for the analog ones, and a stereo
correlation meter.
The main difference to meterbridge is that Jmeters has the
correct ballistics for both the VU and the PPM.
The VU meter measures the average of the absolute value of
the signal, 'average' meaning a second order filter that
reaches 99% in 300ms and overshoots between 1.0 and 1.5%.
It is calibrated to indicate 0dB for a sine wave at -10dB
w.r.t. digital full scale (which is +/-1 peak in this case).
The particular VU scale used is not entirely linear and
starts at -20dB (it's one designed for a passive VU meter
with a diode bridge), so the meter will not move at all
for inputs below that level. Later versions may use a
VU scale designed for an active meter which doesn't have
this threshold.
The PPM is a pseudo-peak meter. It will indicate 80% of
the steady-state value for a 10ms burst, and fall by 24db
in 2.8s. Each scale division (1..7) represents 4dB. It is
calibrated to indicate '7' (+12 dB on the EBU scale) for
0dB FS.
For speech and music with distinct short peaks the PPM
will usually indicate higher. For music with continuous
long notes, and for heavily compressed signals the VU
indicates higher. Both meters require some 'getting used
to' in order to read them correctly.
You can modify the calibration by using the -g(ain) option,
but it should normally not be necessary.
Enjoy !
--
FA
Laboratorio di Acustica ed Elettroacustica
Parma, Italia
Lascia la spina, cogli la rosa.
The 1.0.10 package released a few weeks ago seems to have some packaging
issues (missing files etc...). Therefore a new package has been uploaded
that should fix these issues.
Available at sourceforge:
https://sourceforge.net/project/showfiles.php?group_id=117802
Greets,
Pieter
> jack_capture
> :
> *Added the --meterbridge / -mb option, which automatically
> starts Steve Harris' meterbridge (http://plugin.org.uk/meterbridge/)
> and constantly connects them to the same ports as jack_capture
> is connected to.
Nice - this will save me the hassle of starting meterbridge manually when
setting up for recording and having to make sure that meterbridge's channels
actually match jack_capture's channels.
Thanks for the update!
jonathan
> I'm just playing devil's advocate here, but the Linux audio community
> hasn't exactly been lacking in this area:
>
> http://www.linuxaudio.org/
>
> Is a portal to all kinds of things related to Linux audio (including
> this mailing list).
>
> Not to mention the http://linux-sound.org/ site also.
Let me take this one step further and state that the entire linux-sound.org
database has been ported over into apps.linuxaudio.org with full user access
to maintaining/altering the content which makes linux-sound maintenance
unnecessary (esp. since Dave has effectively decided not to keep it up to
date as often as he would like to). I think it would be nice if we all put
efforts towards a common goal, especially since linuxaudio.org is all about
the community. If there is an aspect of the lao domain you don't like, you
are more than welcome to contribute...
That being said, as always, we continue to be in dire need of
assistance/support in making linuxaudio.org better. This is why I perceive
the fragmentation of community resources to be moving us farther away from
the place where we ought to be and where the consolidated online presence
would be truly useful and meaningful to a community as small as ours.
Best wishes,
Ivica Ico Bukvic, D.M.A.
Director, Linuxaudio.org
Virginia Tech
Dept. of Music - 0240
Blacksburg, VA 24061
(540) 231-6139
(540) 231-5034 (fax)
ico(a)linuxaudio.org
www.linuxadio.org
jack_capture
============
jack_capture is a program for recording soundfiles with jack. Its default
operation is to capture whatever sound is going out to your speakers into
a file. (But it can do a number of other operations as well...)
Screenshot:
http://www.notam02.no/arkiv/src/jack_capture.pnghttp://www.notam02.no/arkiv/src/?M=D
0.9.7 -> 0.9.10:
*Fixed segfault in case the --channels / -c argument is higher
than the number of ports which is possible to connect to.
*Added a terminal vu meter by default. It'll also display red
in case the recorded jack value is equal to or higher than 1.0.
Use "-dv" to disable.
*Added the --meterbridge / -mb option, which automatically
starts Steve Harris' meterbridge (http://plugin.org.uk/meterbridge/)
and constantly connects them to the same ports as jack_capture
is connected to.
*Added the --write-to-stdout / -ws option which writes 16 bit little
endian sound to stdout. Code made by looking at jack-stdout.c by Robin
Gareus.
*Added the --print-formats / -pf option.
*Replaced jack_client_new() with jack_client_open()
Snd-ls V0.9.8.16
================
Snd-ls is a distribution of Bill Schottstaedt's sound editor SND.
(http://ccrma.stanford.edu/software/snd/)
Its target is people that don't know scheme very well, and don't want
to spend too much time configuring Snd. It can also serve
as a quick introduction to Snd and how it can be set up.
Snd-ls also serves as base code for the San-Dysth softsynth
(http://www.notam02.no/~kjetism/sandysth/) and the Snd-rt music
programming language (http://www.notam02.no/arkiv/doc/snd-rt)
http://www.notam02.no/arkiv/src/snd/
0.9.8.13 -> 0.9.8.16:
*Fixed definstrument and faust.
*Removed deprecated CAIRO_FONT_TYPE_ATSUI
*Updated <slider> in snd-rt, <slider> in gui.
(bugs reported by "border")
*Fixed definstrument.
*Replaced jack_client_new with jack_client_open
Hi,
[I've sent this message to several large mailing lists. Please be sure any
replies don't get sent to all of them, i.e. don't use the Reply-to-all feature
of your mail client.]
I'm pleased to announce the release of pytagsfs version 0.6.0. This release
includes significant enhancements as well as critical bug fixes:
* Support for mkdir/rmdir.
* Improved performance for readdir. This makes directory listings faster.
* Fix for broken stat result caching. This bug would have caused significant
performance problems.
* Fix for incorrect directory timestamps.
* Fix for bad handling of updates to previously unrepresentable source files.
This bug would cause files to not appear under the mount tree when tagged.
* Fix for incompatibility with version 0.2 of the Python FUSE bindings.
Thanks to Chris Pickel and Jeremy Jones for reporting bugs and testing fixes.
The full set of changes for this release is available:
http://www.pytagsfs.org/Changelogs/0.6.0
To download this release:
http://www.pytagsfs.org/Download
pytagsfs is a FUSE filesystem that arranges media files in a virtual directory
structure based on the file tags. For instance, a set of audio files could be
mapped to a new directory structure organizing them hierarchically by album,
genre, release date, etc. File tags can be changed by moving and renaming
virtual files and directories. The virtual files can also be modified directly,
and, of course, can be opened and played just like regular files.
For a more thorough introduction, see:
http://www.pytagsfs.org/Introduction
Please visit http://www.pytagsfs.org to obtain more information.
Feel free to contact me with any questions. Feedback is appreciated.
Thanks,
Forest
--
Forest Bond
http://www.alittletooquiet.nethttp://www.pytagsfs.org
Not an April's fool, but for real:
libfreebob 1.0.10 has been released. This maintenance release addresses
the following:
- Add a configure option to disable the samplerate setting at startup.
This enables the use of e.g. the Focusrite Saffire Pro with FreeBoB.
- implement clipping
- generate an xrun when a dropped packet has been detected
Available at sourceforge:
https://sourceforge.net/project/showfiles.php?group_id=117802
Upgrade if you feel like doing so. If all is fine, don't.
Greets,
Pieter
