Linux-audio-user

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20706 discussions

Re: [linux-audio-user] signal processing kits

by Fabio de Matos

> > > > Have you look at Octave? > > > > I think it can be expanded with c(++) modules. > > That is correct. > > It is a relativelu trivial matter to write C++ code which uses the > Octave C++ matrix and array libraries (basically everything that is > written in C++) to write extensions, much like the MEX files Matlab > uses. The extensions have a .oct extension. > > Many of Octave's standard functions are written like this so you can > grab one of these as a starting point. > Sounds good enough! Can it be used in real time ? Could i use it to enhance LADSPA? > I'd use Python ( www.python.org ). It has many scientific 3rd party > expansions, can be extended with C/C++ and can > be operated from a command line. I'm not afraid of learning new languages anymore, but surely i don't have the time either... it takes a while to master it. > Haven't tried it, but ecasound has > a Python interface, maybe you could use > that to get audio plugins working? In fact i wanna make it as generic as i can. My main purpose is voice recognition, and my secondary target is generic signal processing, not necessarily coming from soundcards. So i should need my own customized program. Cheers, Fabio de Matos

23 years, 1 month

[linux-audio-user] Thanks

by Levi Burton

I've been using Linux for quite some time now and finally got around to using it for audio and MIDI. I must say i'm very impressed with all the applications i've been using. Thanks to all (developers and users) for making Linux audio/music development a reality. Levi

23 years, 1 month

[linux-audio-user] Edirol SC D70

by Emiliano Grilli

Hi all, I have an edirol SC D70 (Sound Canvas Digital) which works out-of-the-box with the usb-audio driver. I get 3 MIDI ports (2 MIDI ports of the SC and 1 external MIDI I/O). This device is also an audio interface, but I haven't found how to configure it (if it's possible). Maybe I have to add another snd-usb-audio driven card to modules.conf? I tried to write to alsa-devel, but since I'm not subscribed to that list, the message doesn't show in the archives... so I suspect that it has never been received. Also the page at alsa.opensrc.org doesn't seem to have information on this for the SC D70 Can you help me? TIA PS: I'll have to second Levi and Brian and thank you all for making linux+audio such an exiting combo !!! PPS: sorry for my crappy english... -- .---------------------. | Emiliano Grilli | | emillo(a)libero.it | | Linux user #209089 | '---------------------'

23 years, 1 month

[linux-audio-user] SB Audigy - recommendable?

by Burkhard Woelfel

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi all, I am considering to buy a soundcard for around 100$ and there is an offer for a SB Audigy. Any recommendations? I read that the driver on Sourceforge is still experimental. Did anyone experience problems using that driver? What should I know or consider? Thanks a lot, - - Burkhard - -- no html mail please, thank you. pub key at blackhole.pca.dfn.de 899B AFD7 14E9 D595 EA00 BE8B A348 851C 0F62 E91D -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.0.6 (GNU/Linux) Comment: For info see http://www.gnupg.org iD8DBQE93hdXo0iFHA9i6R0RAu6CAJ9iSrxXS0bPqCDNK93kuCvjPoL5QACdEC1U CQymH3oCgVVjpg0DRyQxP1s= =Kyxe -----END PGP SIGNATURE-----

23 years, 1 month

[linux-audio-user] Re: [Alsa-devel] Re: HDSP 9652 MIDI - A timing disaster?

by Mark Knecht

On Mon, 2003-01-13 at 09:04, Clemens Ladisch wrote: > Mark Knecht wrote: > > I recently purchased an RME HDSP 9652 card. The card is working fine > > for audio, but the MIDI interface is a timing disaster. The interface > > works, but won't keep time. A 2 minute song is Rosegarden takes abut > > 2:45 to play every time. You can hear how the HDSP isn't delivering > > closely spaced MIDI events together, but is sort of smearing them out. > > The hdsp driver doesn't send more than one MIDI byte per timer tick. > IMHO it should be modified to send in a loop until the FIFO is full > (however, I don't know if the HDSP has a FIFO at all). And it should start > sending in output_trigger() instead of delaying it to the next timer tick. > Clemens, Thanks for the response. One comment I forgot to make in the first post. This MIDI interface works fine under Windows, so whatever causes the problem is purely a Alsa MIDI issue. If we can figure it out, then we can fix it. I agree that it sounds like this sort of one note per timer tick. When the interface is supposed to send a chord, it sends what sounds like an arpegiated chord. It's all smeared out. Is there some example code I could look at to understand implementing a FIFO? However, if there is a FIFO Full indication, doesn't we need to know _how_ it's indicated? I would assume it's different for all cards? (Bus possibly similar for cards from the same manufacturer? Also, this is the HDSP 9652, which is a single PCI card. Is this problem showing up for the DigiFace/MultiFace type cards? Thanks, Mark

23 years, 1 month

[linux-audio-user] Re: [Alsa-user] nasty sound feedback using usb-audio and mdk 9.0

by iriXx

[excuse cross-posts... im just desperately trying to get some info on this...!] have establised so far its not the mouse, i dont think.... and its not oss-emulation because alsa-player has the same problem. there is sound coming out, but very heavily distorted... also it seems only to be coming out of the right channel, the left channel just has faint distortion.... never ever come across this one before!!!!!! any help would be very much appreciated... thanx m~ iriXx wrote: > hi, > > i've just reinstalled mandrake 9.0 and successfully got usb-audio > running, but the sound quality is heavily distorted - to say the least - > well basically its all feedback!! it can't be a usb mouse conflict, as > was suggested on another list, as i am not running any other usb devices > concurrently with my usb m-audio quattro - i only have one usb port on > my thinkpad 600E. but i wonder if there is some kind of conflict going > on nonetheless. > > does anyone have any idea what may be causing this? it seems very > strange as everything worked fine with tarball alsa 0.9.rc5 and mandrake > 8.2 - i'm now using the supplied rpm versions of alsa with mandrake 9.0 > - i prefer to use the alsa-project.org tarballs, but in this case i have > decided to stick with the supplied rpms to avoid conflicts between the > two as happened > to me earlier. > > thanks in advance > > m~ > > > -- iriXx www.iriXx.org copyleft: creativity, technology and freedom? info(a)copyleftmedia.org.uk www.copyleftmedia.org.uk _ ( ) ascii ribbon against html email X / \ cat /dev/sda1 > /dev/dsp *** stopping make sense ***

23 years, 1 month

usb-audio feedback was Re: [linux-audio-user] poor audio quality in tX?

by iriXx

hi, i'm just checking the archives re: patrick's problem with audio quality under X, as my quattro is configured ok now but making only loud feedback noise when i go to play anything.... my mouse section in XF86Config-4 is as follows: Section "InputDevice" Identifier "Mouse1" Driver "mouse" Option "Protocol" "PS/2" Option "Device" "/dev/psaux" Option "Emulate3Buttons" Option "Emulate3Timeout" "50" EndSection i'm using the trackpoint on my thinkpad 600E - should i change any of this? i think i'm using gdm as well - at least, i have a file called /etc/gdm-root.conf - no /etc/gdm.conf tho.... please help.... i'm really stumped for what might be causing all the feedback noise as its never happened before in mdk 8.2.... everything was fine there.... im using supplied alsa rpms from mandrake 9.0 (there was a long discussion on the pros and cons of this before, have gone with the rpms, against my preference but because its hard to extract them once installed).... thanx m~ > I have seen crazy mouse syndrome in X when switching from a wheel mouse > to a non-wheel mouse (and maybe the other way around too). It appears > that XF86Config (for XFree 4) needs > > Option "Protocol" "imps/2" > Option "ZAxisMapping" "4 5" > > for a wheel mouse and > > Option "Protocol" "ps/2" > > for a non-wheel mouse. -- iriXx www.iriXx.org copyleft: creativity, technology and freedom? info(a)copyleftmedia.org.uk www.copyleftmedia.org.uk _ ( ) ascii ribbon against html email X / \ cat /dev/sda1 > /dev/dsp *** stopping make sense ***

23 years, 1 month

[linux-audio-user] [ANN] JACK Rack 1.1.1

by Bob Ham

Be gone foul bugs! * fixed control output ports segfault * fixed desktop installation prefix stuff * fixed bug dealing with duplicate plugin ids * now quits when you close the window * added a "New" option to clear the rack * rack is now automatically cleared when you load a file http://pkl.net/~node/jack-rack.html Bob

23 years, 1 month

[linux-audio-user] signal processing kits

by Fabio de Matos

Hi, I'm looking for a platform for signal processing, who can be used in command line mode ( matlab like ), but is based in low level code ( c or c++ ), and block based signal chain. I wish i could find some kind of front end to any standard plugin types. It was desirable also that the standard plugin used is able to handle data other than audio ( not so hard, i believe ), and in other domains than time ( e.g. frequency, statistical, and weirdo like domains ). Preferably it should have support for gui also, basically for plotting graphics only. thanks all, Fabio

23 years, 1 month

[linux-audio-user] via82cxxx_audio

by Sakari Aaltonen

With help from a few kind people here, I got my ALSA sound working with xine. However, this was at 8 bits of color depth, and the video picture was not too good. So I tried 16 bits, which made xine fail, as it did MPlayer. But at 24 bits, MPlayer came to life and showed a picture that was (probably) as good as it gets. But... MPlayer doesn't like ALSA sound. It tries to keep video and audio in sync for 10 or 15 seconds; then it gives up and goes silent. It says my system is too slow; one of the reasons might be slow audio. So I thought I'd try the via82cxxx_audio module that is in the "official" 2.4.20 kernel. But... I can't insmod the module. It complains /lib/modules/2.4.20/kernel/drivers/sound/via82cxxx_audio.o: init_module: No such device Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters. You may find more information in syslog or the output from dmesg /lib/modules/2.4.20/kernel/drivers/sound/via82cxxx_audio.o: insmod /lib/modules/ 2.4.20/kernel/drivers/sound/via82cxxx_audio.o failed /lib/modules/2.4.20/kernel/drivers/sound/via82cxxx_audio.o: insmod via82cxxx_audio failed (No, neither syslog nor dmesf offers more information.) Am I missing a /dev? Which one? Thank you, Sakari Aaltonen

23 years, 1 month

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Linux-audio-user