Hi Martin,
Another mailinglist worth posting is music-dsp:
http://music.calarts.edu/~glmrboy/musicdsp/music-dsp.html
There you may often meet Angelo Farina, who has made available an amazing
quantity of publications about Room Acoustics among other fields:
http://pcfarina.eng.unipr.it/Public/Papers/list_pub.htm
For your concern, let me quote the following one:
"APLODSP, design of customizable Audio Processor for LOudspeaker system
compensation by DSP", 109th AES Audio Convention, Los Angeles, 18-22 September 2000,
http://www.ramsete.com/Public/Papers/147-AES00.PDF
When it comes to Linux, you may already know the "Sound & MIDI Software For
Linux" ressource site, which contains the following sections:
- DSP Software: http://linux-sound.org/dsp.html
- Scopes: http://linux-sound.org/scopes.html
Not featured there for the moment, JAAA (the Jack and Alsa Audio Analyser), by
Fons Adriaensen, will be presented at the 2nd International Linux Audio
Conference, 29 April - 2 May 2004, ZKM Center:
http://users.skynet.be/solaris/linuxaudio/http://on1.zkm.de/zkm/stories/storyReader$3625#abstract_adriaensen02
If you want ISO-normalized linear or logarithmic swept sines, have your own
series burnt with Reference Audio CD:
http://refacd.sourceforge.net/
There are other techniques worth-using when it comes to getting room impulse
responses, especially one based on MLS sequences, most of which you'll have
compared on this document:
"Comparison of different impulse response measurement techniques", G.-B. Stan,
J.-J. Embrechts, D. Archambeau, Journal of the Audio Engineering Society, Vol.
50 (2002), n°4, pp. 249-262,
http://www.montefiore.ulg.ac.be/~stan/ArticleJAES.pdf
You can at last also check my Mozilla-generated bookmarks page, where you'll
find most of the above, bearing in mind it is frequently subject to change:
http://theremin.free.fr/hunchback/index.php?nodes=|0|1|50|
This points you to the following nodes (remove the last prefix of the url in
case of malfunction):
+ ArkaKlap
+ Kontenu
+ Kode (Dev Ressources)
+ Kours (Papers)
+ Koncurrence (Soft- & Hardware Ressources)
I'll try to make Octave m-files (an opensource 95% Matlab clone) available by
the end of May: MLS / swept sine generation, impulse response extraction,
inverse filtering...
Cheers,
Christian Frisson
It's me again with some config issues..
After getting my soundcard (Terratec DMX 6 Fire) to work correctly with
Audacity, i decided to use Muse... So i installed Jack.
But when i do jackd and it creates the alsa driver, it puts 0 and 0 for number
of input and output channels. When i try to force it into something else with
-i 6 and -o 2 for example, it tells me "ALSA:cannot set channel count to 6
for capture".
Within Audacity, i can set the number of recording channels to whatever i want
and they all record properly so i'm a bit surprised why it doesn't work with
jackd... Any idea? Any help would be very much appreciated as i've been
reading various FAQ/help pages on various sites but haven't found any answer
yet...
Have a box I have just put MDK 10.0 Community on.
Shuttle A39k Mobo, Athalon XP 2600, 512MB, Via chipset...Shows realtek
chip on soundcard in Alsa mixer.
Have installed Thacs 2.6.5 MM kernel, modprobed "realtime allcaps=1"
manually. Installed the regular set of apps also from Thacs recently
updated page for 10.0;
Qjackctl
Jackit .98
Ardour most recent
etc,etc,etc.
I can get Jack to fire up no problems but the Xrun callbacks run like
crazy! It seems to do it only on the playback side of the duplex I/O.
(tested in options of Qjackctl) Does not appear to do it on Capture.
Ardour connects as client etc. Seems fine although I've not tried to
record anything yet. Just realized that the only thing I have not set up
is "tmpfs" although I did on the last install with the exact same setup
and it still did the same thing.
Any ideas??
Thanks
Just in case I ain't said it lately, This Linux community is the
GREATEST~~~ ;)
Anouncing version 0.6.0 of FreqTweak.
http://freqtweak.sourceforge.net
New in this release are spectral filter Modulators, which can animate
and modulate any of the filters automatically in several ways.
If you thought FreqTweak was fun before, be prepared for hours of
audio mayhem. See the webpage (and the software) for details.
Just in time for the ZKM/LAD conference in Karlsruhe :)
Please report any problems compiling this release on your various
platforms to me, and as always report any bugs or feature requests to
freqtweak-user(a)lists.sourceforge.net (you must subscribe first).
Enjoy,
Jesse Chappell
------
FreqTweak is a JACK-based application for FFT-based realtime audio spectral
manipulation and display. It provides several algorithms forprocessing audio
data in the frequency domain and a highly interactive GUI to manipulate the
associated filters for each. It also provides high-resolution spectral
displays in the form of scrolling-raster spectrograms and energy vs
frequency plots displaying both pre- and post-processed spectra.
-------
hello,
i am trying to record impulse responses from
my studioequipment to correct it's phase and freq responses
with e.g. DRC and bruteFIR.
I heard the best idea would be to take log sine sweeps
for the measuring?
it would be great if someone more experienced than me
knows of a good method to create sweeps (or chirps) of equal
freq.response with linux software?!
or maybe some other tips and tricks about audio impulse response
measuring with linux?
peace
mart
Hi guys,
I was wondering if someone could recommend a good way of recording RealAudio streams so that they ultimately end up on disk as .wav or .mp3 or .ogg files.
I looked at Jack, but RealPlay isn't listed as one of Jack's compatible applications.
I looked for a RealPlay plugin for XMMS (someone said he used that plugin and XMMS's Disk Writer plugin), but I couldn't find it anyway.
Any help would be most appreciated.
Thanks,
Christian
Hi,
as the onboard soundchip on my Epox 8RDA3+ (CMedia 9739) doesn't work
very well, I'm looking for a cheap soundcard which can handle 5.1 sound.
It should run under Linux (Debian Sarge, Kernel 2.6) and Win98, and I
want to be able to play AC3 sound (that can be done in software, right?).
I've already looked around and found several cheap 5.1 cards, but I have
doubts about their Linux compatibility... Can you tell me something
about these cards:
Creative Soundblaster 4.1 Digital
Creative Soundblaster live 5.1 Digital
Typhoon Acoustic Six 5+1
Terratec Aureon 5.1 Fun
Is any of these cards well supported by Alsa, and can I play 5.1 and AC3
sound with it? I've already nearly decided for the SB live 5.1 Digital
but then noticed that it's not that well supported...
Or is there any other card which you could recommend? I don't want to
spend too much, it should definitely stay below 50 EUR, but I don't have
high expectations (playing MP3s and games, watching movies, getting
system sounds...).
Thanks in advance for your help,
Oliver Gerlich
Hi there.
I have a Boss BR-532 digital multitrack, which saves my songs onto SmartMedia
cards. I can then get these files onto my PC using a USB card reader. So far
so good.
Two questions:
1) Probably a long shot, but does anyone have any clue as to how I might
convert the files from the BR-532's internal format to WAV or whatever? I can
do this using a Windows GUI program supplied by Boss (runs fine under wine),
but the interface is rather fiddly and limited. Any chance I might be able to
do this eg. with some kind of command line / scriptable tool? Cursory
Googling hasn't revealed a lot about the file formats to me - they're
described as 'MT2', 'LV1', and 'LV2' (in decreasing order of sound quality).
I usually use LV2 (for that much sought after lo-fi sound...).
2) Once I've got my WAV files, can I just drag them into Audacity / Ardour etc
and assume they'll stay synced? Or is some kind of additional syncing used to
keep tracks aligned?
Thanks for any help.
[sorry if people get this message more than once - technical probs]
On Thursday 22 April 2004 11:04, Joe Button wrote:
> Hi there.
>
> I have a Boss BR-532 digital multitrack, which saves my songs onto
> SmartMedia cards. I can then get these files onto my PC using a USB card
> reader.
...
> does anyone have any clue as to how I might
> convert the files from the BR-532's internal format to WAV or whatever? I
> can do this using a Windows GUI program supplied by Boss (runs fine under
> wine), but the interface is rather fiddly and limited.
As an aside, in case it helps anyone else, I had to put this in
~/.cxoffice/dotwine/config to get the file converter prog to recognise my
local copy of the files as a windows drive:
[Drive Q]
"Path" = "/home/joe/br532/hd"
"Type" = "hd"
"Label" = "Memory card"
"Filesystem" = "win95"
So now I can copy my SmartMedia card's contents into /home/joe/br532/
rm -rf /home/joe/br532/hd/
cp -a /mnt/hd /home/joe/br532
and card's contents then show up as drive Q in the nasty Windows converter
thingy. Of course it would be possible to just make '/mnt/hd' drive Q and
work directly from the card, but this way I get to back everything up at the
same time.
Probably not very interisting to most of you, but maybe oneday some will find
this in the archives and be eternally grateful...
