Linux-audio-user May 2006

linux-audio-user@lists.linuxaudio.org

184 participants
187 discussions

by Atte André Jensen

Hi I'm thinking about getting an ibm x31, pentium M, 1.6ghz laptop. Anyone has this or knows how well it would perform for low latency, linux audio? 1) How good/decent/crappy is the onboard soundcard? 2) How much of it's hardware can I expect *not* to get working? 3) How would the 1.6 pentium M compare to my pentium 2.4 laptop in performance? My main sound app is csound, and I normally run debian/stable... Link (danish, but you might be able to see more specs): http://www.laptops.dk/product_info.php?products_id=444&osCsid=4ae0fe9028214… -- peace, love & harmony Atte http://www.atte.dk | quartet: http://www.anagrammer.dk http://www.atte.dk/gps | compositions: http://www.atte.dk/compositions

18 years

[linux-audio-user] Nothing new!

by Folderol

Well that says it all really :) I've oggificated a few more of my tracks and also re-balanced the instruments - That doesn't make them play any faster but might make them sound smoother :) The tracks affected are Raspberry Jam, Trixie & Sad Angel I'm hoping I might have something new by the end of the weekend, but the better the weather, the less likely that is happen. I'm seriously in need of prolonged photon bombardment and corporeal rejuvenation. folderol.ukfsn.org P.S. I also got bored with a plain white background! -- F

18 years

[linux-audio-user] Sound cards inquiry (onboard solutions).

by Gain Paolo Mureddu

Hello list, I know my inquiry is more suited for the ALSA list, but I thought I would ask you guys here first (more like the users, than users having issues with drivers). Well, the thing is that I would like to know which "embedded" audio solutions, in your experience provide the best set of features? Let me explain, I am conducting a research on Linux for the average user on commodity hardware. The thing is that for some tasks, the embedded audio solutions, simply won't "cut it", particularly for VoIP applications which are gaining strength and the overall multimedia experience. To this end, we all know audio plays a key role. However right now on Linux there is a big problem: A mixed audio environment. Why do I say this? well, on one hand we've got the incredible efforts made by the good folks over at the ALSA project, an on the other hand, we've got the number of applications that still use the Open Sound System for compatibility with other Unix systems. This is not a bad thing, the problem, in my experience, is that as a general rule commodity hardware (i.e motherboard embedded audio solutions) do not, at large, support hardware mixing with the ALSA drivers. This is a problem, because in the mixed environment with ALSA drivers, and OSS applications it is simply next to impossible to have proper software mixing. ALSA can do soft mix, but it can do so with applications which "talk" ALSA. Fortunately ALSA can decode OSS applications' audio calls, but can't soft mix the streams. This is the problem (IMO a big problem) for the average user who may want to play a game of supertux while talking with mom in Ekiga, and having some music in the background while keeping the game's SFX. These are not uncommon scenarios any more. So, if a user asks what components would he have to buy in oder of being able to experience all these sound-rich environments with Linux, or a user who may be in the hunt for components for a new Linux PC with commodity hardware that would do the job; which embedded solutions support hardware mixing with ALSA in Linux? I know the obvious answer is "Go check the ALSA sound card matrix", but here's a problem: which chipsets are actually used for motherboard audio solutions and which are used for separate cards? I know a plethora of users have opted to some solutions like running two cards, the embedded and a cheap add-on card, or stuff like that, while others are lucky to have, say a VIA VT8235/37 southbridge based motherboard with an audio controller, which supports up to 4 channels (voices/devices) in hardware, or some others are even luckier and have one of the rare 4DWave based audio solutions (which support as much as 32 channels/voices/devices). I know some chipsets like ALi and VIA (VT8235/37) support hardware mixing, but there might be a problem: the offering of VIA based motherboards is not that great anymore ever since ATi and nVidia started playing SLI/Crossfire, and as such have flooded the market with these boards, which include an ALC audio codec or the atiixp controller which both do not support hardware mixing (in my experience, anyway, things might have changed). The majority of audio solutions "in the wild" use the snd-intel8x0 driver which to the best of my knowledge does not support hardware mixing or the chips used with it do not support it. Given the mixed audio environment in Linux, and hence the lack of ability to successfully soft mix with either drivers (ALSA/OSS) while using an application written for the other, is why in my opinion, hardware mixing is a must for Linux for the average user as it stands today. I realize this will slowly change overtime as even more abstractions are made available to make this transparent across Unix systems (like the use of Gstreamer as the platform-dependant sound backend) and the audio system, applications and drivers used will no longer be a problem, but in the mean time, a great deal of users who want to use Linux experience some problems that for some may not be showstoppers, but for others they deffinitely are. By the way, I asked first here, to gather *user* information, rather than developers, as different users usually have different experiences with the same or similar hardware. I am so terribly sorry if this is completely off-topic in the list and if the e-mail is too large.

18 years

[linux-audio-user] Korg Legacy controller (MS-20 usb-midi) under Linux?

by Sébastien Cevey

Hello! I am very tempted by the Korg Legacy Collection package [1], which includes the Legacy emulation software (for win32/MacOS X) and a USB-Midi controller keyboard mimicking the design of the Korg MS-20. Obviously, the software would not run under Linux, but I was wondering if anyone has tried to use the keyboard as a standard midi controller (keys+knobs) under Linux? The manual says it works out-of-the-box on MacOS X using the standard midi drivers ; would this mean that it uses standard usbmidi protocol and would work with the generic kernel module? Thanks in advance! [1] http://www.korg.co.uk/products/software_controllers/legacy/sc_legacy.asp -- Sébastien Cevey <seb(a)cine7.net> | http://sirius.cine7.net/ | GPG: AEE9D6B9 Jabber: theefer(a)albus.cine7.net | ICQ: 48895760 | MSN: theefer(a)hotmail.com " To condense fact from the vapor of nuance. " Neal Stephenson [ Snow Crash ]

18 years

[linux-audio-user] multichannel streaming

by Georg Holzmann

Hallo! We are searching for a streaming-server for a e-learning system at a university, which can manage the following requirements: - open source - multichannel streaming in ogg (or mp3) - one audio-stream is only for one listener (it should be integrated in a zope/plone system, where only registered user can hear the stream - they can choose between various (copy-protected) pieces they want to hear, then a stream should be opened and only the one who opened it can hear it ...) - user should be able to control the audio-stream: play, pause, stop, forward, backward, time seek ... Any suggestions which of the various open source streaming-servers (icecast, freecast, ...) come close to that or already have those features ? Many thanks in advance, LG Georg

18 years

[linux-audio-user] Denormal problems with some LADSPA plugins

by Q

Hi everyone I'm having denormal problems with some LADSPA plugins, mainly the Triple Band Parametric with Shelves, Plate Reverb and Glame High Pass filter (which I started to use to replace that function in the Parametric). They are really useful plugins but after a short space of time an instance of one of them will start racking up thousands of Xruns and processor usage climbs inexorably towards 100%. I occasionally had problems before but it seems a lot worse since I moved to DeMuDi 1.3 and the later version of Ardour that ships with it, but it's probably just a case of selective memory. Sampo suggested on the Ardour forum that I should try compiling the SWH plugins using SSE instructions -- thanks for that. I got the latest tar of the plugs and compiled them using those instructions but unfortunately it hasn't cured the problem. Probably I did something wrong -- I can't say I fully understood the options in the Readme. Has anyone any advice on how to cure this problem, or any ideas where I might have gone wrong compiling with SSE instructions? Preferably in words of one syllable or fewer ;-) I'm using a Pentium 4 if that makes any difference to anything. Thanks in advance, qb

18 years

Re: [linux-audio-user] Firewire sound - which HW?

by Sampo Savolainen

Quoting jan <jan(a)talentex.demon.co.uk>: > I'm looking to buy some sound recording equipment for my computer, but > what should I get? The shop I went to recommended Motu Ultralite, Motu > 828 MKII, Edirol FA101 or Focusrite Sapphire, all of which look fairly > nice. But how about support for them in Linux? > To get an audio device to work with all software under linux, you need ALSA support. See http://www.alsa-project.org/alsa-doc/ for a complete list. None of the above are supported by ALSA. Firewire device support currently relies on the freebob project. Freebob doesn't currently provide an ALSA driver, but jackd includes a freebob backend. This means, that while you can't use normal consumer audio software (typical mp3 players, flashplugin, etc), you can use a firewire device with software using jackd. (Some mp3 players, etc. also support jackd). Freebob is aiming for proper ALSA support, but they aren't there yet. For which devices freebob supports, see: http://freebob.sourceforge.net/index.php/List_of_Supported_Devices >From your list, the FA101 and the Focusrite Saffire are supported. At the moment it looks like MOTU devices will never get support, as MOTU is refusing to release specifications. The same goes (sadly) for the RME fireface. Sampo

18 years

[linux-audio-user] Combining regions with ardour

by Marcel Karras

Hello, I'd like to combine some regions of a track that a overlayed. A search on Google didn't solve the problem - so can anyone of you tell me how to make one region out of n other ones? (like combining layers in gimp) Greetings - Marcel Karras -- ------------------------------------------------------------------------ Contact: toka(a)freebits.de karma(a)informatik.tu-chemnitz.de http://www.freebits.de http://www.tu-chemnitz.de Unix, Linux && OpenSource Student of Chemnitz University of Technology ------------------------------------------------------------------------

18 years

[linux-audio-user] fst problems

by Aaron Krister Johnson

Hi, I've recently compiled fst-1.7 on a Slackware 10.1 system. Wine version is wine-20050310. I get the following error when I issue this command to try the "Kontakt2Demo.dll": root@aaron:~/fst-1.7# ./fst /home/akj/Desktop/Kontakt2Demo.dll and this is what happens: wine: Unhandled exception (thread 0009), starting debugger... WineDbg starting on pid 0x8 Unhandled exception: page fault on read access to 0x40fffd80 in 32-bit code (0x4000a753). In 32 bit mode. Register dump: CS:0073 SS:007b DS:007b ES:007b FS:0033 GS:0000 EIP:4000a753 ESP:40e5f8e4 EBP:40e5f9dc EFLAGS:00210202( - 00 - -RI1) EAX:40fffd80 EBX:40015ff8 ECX:00000000 EDX:40e5f90c ESI:40e5fa24 EDI:40015cc0 Stack dump: 0x40e5f8e4: 00000000 00000000 00000000 00000000 0x40e5f8f4: 00000302 40166d20 7800305c 78003058 0x40e5f904: 000041ed 00000000 00000000 00000000 0x40e5f914: 00000000 00000000 00000000 00000238 0x40e5f924: 00000000 00020000 00000001 00000000 0x40e5f934: 446a1bb0 00000000 443fcf84 00000000 Backtrace: =>1 0x4000a753 _dl_catch_error in ld-linux.so.2 (0x40e5f9dc) 2 0x401672c1 _dlerror_run in libdl.so.2 (0x40e5fa0c) 3 0x40166cf1 GLIBC_2 in libdl.so.2 (0x40e5fa3c) 4 0x400335cc wine_dlopen in libwine.so.1 (0x40e5fa58) 5 0x40032d17 wine_get_es in libwine.so.1 (0x40e5fa88) 6 0x400332b8 wine_dll_load in libwine.so.1 (0x40e5fab4) 7 0x401a92bf in ntdll (+0x292bf) (0x40e5fd04) 8 0x401a9c10 in ntdll (+0x29c10) (0x40e5fd9c) 9 0x401a75c7 call_dll_entry_point in ntdll (0x40e5fe44) 10 0x401a7b27 call_dll_entry_point in ntdll (0x40e5fe78) 11 0x401aa758 LdrInitializeThunk in ntdll (0x40e5ff20) 12 0x404e7f8b in kernel32 (+0x47f8b) (0x40e5fff4) 13 0x40033cbd wine_switch_to_stack in libwine.so.1 (0x00000000) 0x4000a753 _dl_catch_error+0x43 in ld-linux.so.2: movl 0x0(%eax),%ecx Wine-dbg> Any thoughts? Best, Aaron.

18 years

[linux-audio-user] how to force an alsa midi cleanup?

by Robert Persson

How can I force a midi cleanup? The situation I have right at the moment is that the connection graph in qjackctl is showing midi ports for rosegarden, even though there is no rosegarden running (I have double-checked using "ps -A | grep rose"). I have tried a whole lot of things, including rmmodding a whole raft of midi-related modules, but I haven't been able to find a way to clean up my midi graph short of rebooting (which I am about to do). What should I have done? Thanks Robert -- Robert Persson Conspiracy Bears: Once upon a time there were lots of conspiracy bears...

18 years

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Linux-audio-user May 2006