Linux-audio-user January 2004

linux-audio-user@lists.linuxaudio.org

148 participants
168 discussions

[linux-audio-user] Kernels, and disk I/O

by Anahata

Hi While all the excited chat is about the shiny new kernel 2.6.0, I have a 2.4.x question: I used 2.4.18 until recently, when I found that a disk I/O scheduling problem (lack of responsiveness while writing backups to an optical disk) was solved by upgrading to 2.4.20. Now I find that recording audio on 2.4.20 is useless, with long droputs in the recorded sound. I'm sure this is related to the way the system periodically dozes off for a few seconds (not echoing console input) while it does some disk intensive work. Rebooting 2.4.18 restored audio sanity, fortunately. The kernel has no low-latency patches applied. The sound system is M-Audio DIO2448 + OSS drivers Hard disk is standard IDE, tuned with hdparm Distro is Debian 3.0 with quite a lot of "testing" packages installed. Base H/W 800MHz Duron + 256M RAM. This does seem to be related to the disk I/O scheduling change, or possibly virtual memory Is there a kernel guru who can advise? Possible options seem to be: 1. Apply low latency patches 2. Upgrade to 2.4.22 3. Upgrade to 2.6.0 4. something else? -- Anahata anahata(a)treewind.co.uk Tel: 01638 720444 http://www.treewind.co.uk Mob: 07976 263827

21 years, 2 months

[linux-audio-user] Re: RME Cardbus + multiface

by BrbrOfSvl＠aol.com

In a message dated 1/11/2004 12:00:15 PM Eastern Standard Time, linux-audio-user-request(a)music.columbia.edu writes: > > since both paul davies and thomas charbonnel have not really an idea, > what's the problem i doubt that it's a problem on the alsa side ... my > 16bit wlan card works fine on this machine, but it's the only 32bit > cardbus card i ever tried on this machine ... > > i'm nearly at a point where i consider selling my (not that > old) > notebook (acer aspire 1400) and buying a new one ... Are you sure it's not a problem with the card itself? Have you tested it with a different box, maybe on a Windows or on a ccrma Redhat system? M

21 years, 2 months

[linux-audio-user] Recommendations for audio software needed

by Conrad Newton

I need some advice from those more experienced with audio software than myself. I am building a Knoppix-style live CD that will be used by teachers and pupils in Oslo, Norway. Most of the users are unfamiliar with Linux, and the CD is supposed to be their first introduction. Within the audio category, it is obvious that I should have a CD player (kscd), a CD-burner (k3b), and an mp3/ogg player (xmms). I also want to have some music editing software, and I have identified the following programs as potentially interesting ardour audacity muse rosegarden4 I have also been meaning to include solfege, the ear training program on the CD, but without really being certain how many people would use it. My question is, if I can only include 2 of the above programs (for space reasons), which two should I take? Bear in mind the restriction that the users are not a high-tech crowd. If I can make an analogy with image manipulation, let me say how I solved the problem: I included both tuxpaint, a simple paint program that even small children could enjoy, and the GIMP, an advanced image manipulation program that counts in some circles as an Adobe Photoshop replacement. In this way, both the beginner and the advanced user can be satisfied. I would like to satisfy the audio users in much the same way, if I could. Thanks in advance for your comments and advice. Conrad

21 years, 2 months

[linux-audio-user] Re:M-audio products

by David Baron

I have a Dman2044. Oldy but goody with a nice chunky breakout box. 4 by 4. Alsa list this for a cs46xx driver. Knoppix install detects it as an AGOPO Maestro card Alsa's auto install detects it as an es1968, also Maestro. None of these alternatives work. The OSS Maestro driver will load but not play. The alsa's will kick at the modprobe Any one know what to do? (I have posted on this before.)

21 years, 2 months

[linux-audio-user] Using Creative sb16 CSP(DSP) chip?

by Pietro

Hi, I've just switched my system to Kernel 2.6 and installed ALSA. I've perfectly configured everything... I've a Sound Blaster 16 with CSP (an ISA card ten or more years old!) that works very fine. I've modprobed snd-sb16 with the option that rise csp support. $ cat /proc/asound/card0/cspD1 Creative Signal Processor [v1.0] State: -x--- I do not know very well what a CSP, Creative Signal Processor, but I think, reading at ALSA sources, that it's a chip that speedups some compressions/decompressions using some audio codecs. I would like to know how can I actively use this gorgeous more-ten-years-old chip with some applications. Maybe, I'll save a cople of seconds when I transform a wav to mp3 (or ogg that's better!)? Thank you very much!, Pietro -- +------------------------------------------------+ | "Pietro" <p.alfa(a)email.it> | +------------------------------------------------+

21 years, 2 months

[linux-audio-user] ALSA, JACK, Ardour, JAMin on Fedora Core 1 w/2.6.0-mm2

by Jan Depner

Would anyone be interested in versions of my ALSA, JACK, Ardour, JAMIN installation directions for Fedora Core 1 with 2.6.0-mm2. The originals for RH 7.3 are at: http://myweb.cableone.net/eviltwin69/ALSA_JACK_ARDOUR.html http://jamin.sourceforge.net/ I just got one of those $200, 1.4 GHz Duron, Wal-Mart specials (for my wife) and have loaded Fedora Core 1 and the above on it. If everyone is using the Planet CCRMA at Home stuff for this I'll pass. If anyone is interested I'll make new versions over the next few days. My testing time is limited as I'm about to be out of country for a few weeks. Jan

21 years, 2 months

[linux-audio-user] What linux-compatible card truly supports AES/EBU?

by Michal Kostrzewa

Hi List! I'm looking for a card meeting the following requirements: 0) *Linux supported* :) 1) It has AES/EBU channels (4 as minimum) 2) 192 kHz / 24-bit Single-wire and Dual-wire Modes 3) External synchronisation Master Clock or Word Clock 4) Ability to acquire data without any further on-card processing The main purpose is to connect this card to dCS converters (which have only AES/ABU) It's something like Lynx AES16 (http://www.lynxstudio.com/aes16.html) but alsa soundcard matrix shows that it's not supported... I know that HammerFall DSP MultiFace has theoretically AES/EBU but I think it's just S/PDIF - has too low signal level and doesn't work with our dCS convertes at rates >=96kHz. any help greatly appreciated :) best regards, Michal Kostrzewa

21 years, 2 months

[linux-audio-user] midi troubles

by C. Villard

Thank's for all your answers ; unfortunately, I've not succeded until now ..... But I've not a lot of time left to spend now...perhaps later...so I fear that i must reconnect my atari falcon with cubase audio : great problem to print correct scores with the actuals printers, but no trouble in use !!! cordialement, PS : I think it would be great to get a cd with all stuffs nneeded, to make a linux midi station work properly ; with my poor rtc net connection, it's too diffcult

21 years, 2 months

[linux-audio-user] Re: Recommendations for audio software

by Conrad Newton

>From BrbrOfSvl(a)aol.com on Friday, 2004-01-09 at 01:11:49 -0500: > > In a message dated 1/8/04 5:32:16 PM, > linux-audio-user-request(a)music.columbia.edu writes: > > > > But if I had to choose a musical education tool for teachers > > and young people, might I not be better off with a midi > > program such as muse or rosegarden4? > > > > What would be the advantage of csound/cecilia? > > > > > > You will not find better software than Csound for making people actually > think about the nature of sound. I learned more about acoustics/psychoacoustics > working with csound than I did in any class on the subject (not a knock on my > teachers, however, who have been great). Its small size and enormous > versatility, with the addition of a score-making front-end like score11 or ngen, I had not heard of these programs before. Thanks for the tip! > could prove an extremely valuable application for advanced students who want to > know what's actually going into the sound they are producing. I don't like > cecilia at all - though it does make some things (particularly granular > synthesis) somewhat easier. I feel the great versatility of csound lies in its > absence of an encumbering GUI. I also am not fond of midi, but I guess it's > unavoidable. Trouble is, my target audience will collapse in a heap without a GUI! > I would not include Ardour unless you want to include other Jack clients. > Ardour is buggy (though the newest release is better), and it can be a real > pain to use. I really like Rezound, but it can be a little buggy (particularly Ardour is out, according to everything I have heard until now. > if you are using it as a jack client). Jack is good if you have a soundcard > that will only talk to one program at a time, and you need to do several > things at once - with jack you can run Ardour's output into freqtweak, and send its > output into rezound for recording on the fly. Depends on what you want to > be able to do with this stuff. Another decent program you might check out is > Pure Data (or PD) - great for realtime applications if you're into that. Another application I know nothing about. I will look it up. Thanks for your comments and suggestions. Conrad

21 years, 2 months

[linux-audio-user] intel8x0: clocking to 48000

by Atte André Jensen

Based on the fact that the following line is the second last displayed by dmsg, I presume my intel i810 is set to a sample rate of 48000: intel8x0: clocking to 48000 I also presume this is not optimal and should be changed to 44100, right? Where is this done? I run debian/unstable on both 2.4.23-low-latency-patched and 2.6.0/1 kernels with the latest alsa on 2.4 and the build in alsa in 2.6. Please bear with me, but I don't really know which config files to post.... Thanks in advance. -- peace, love & harmony Atte http://www.atte.dk

21 years, 2 months

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Linux-audio-user January 2004