Linux-audio-user November 2002

linux-audio-user@lists.linuxaudio.org

82 participants
66 discussions

by Anahata

Until now, I have been using a MD 4 track for recording and my invovement with Lunux audio has been at stage of mastering the stereo mix and CD burning. However I'm beginning to appreciate the editing and multi track power of even a relatively simple package like audacity and considering using the PC and hard disk for more audio work. One of the sticking points is that I have an investment in some nice outboard gear - an FMR compressor and Lexicom MPX-200 reverb unit, and a mixer with swept mid EQ. What are my options for either (a) hooking the outboards to the PC (soundcard with lots ins and outs, possible latency issues) (b) Getting good EQ, reverb and compression all in software? (free software of course) I currently have a M-Audio DIO 2448, with 2 channel SPD/IF I/O System is a Duron 850, 384Mb, Debian 3.0 with 2.4.18 kernel -- Anahata anahata(a)treewind.co.uk -+- http://www.treewind.co.uk Home: 01638 720444 Mob: 07976 263827

21 years, 5 months

[linux-audio-user] Re: [Alsa-devel] usb audio sound quality

by Patrick Shirkey

Patrick Shirkey wrote: > I'm getting a lot of wierd sound quality bugs while using JACK. It seems > like the driver is storing the crappyness somewhere and each time I > access it the quality gets worse. Is it possible that the driver could > allow the data to linger and make things unstable? > > I have been doing some testing today with various softsynths and my mem > is getting pretty full. Turning off jack just freed up 10MB but still > it's at > > Mem: 386484K total, 336212K used, 50272K free, 41304K buffers > > The machine has been up for 7 hours. Is that reasonable? > > This is all done with tuned disks, lowlat and root access. Yesterday I was having this problem. I also tested the sound quality of native alsa vs jack by using two alsaplayers one connected to alsa and one connected to jack. While doing that I found that the output quality was exactly the same so I assumed that it was the alsadriver that was at fault. However After letting the machine and device cooldown while I slept and testing with native alsa today the sound quality is crystal clear. When I test through jack the quality is degraded. I assume that it is the demands that jack places on the system that is causing the quality to degrade. I have just gone down from 9 -> 6 screens in my virtual desktop and that seems to have gone a long way towards cleaning the sound. Any ideas on how I can tune x to give me those screens back? I currently use a geforce2 with nvidia drivers. I'm holding out on getting a new video card until the price of the new ATI has dropped. Does anyone know how the support for that card is going? -- Patrick Shirkey - Boost Hardware Ltd. For the discerning hardware connoisseur Http://www.boosthardware.com Http://www.djcj.org - The Linux Audio Users guide ======================================== Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done. Goldie, 8 Nov, 2002 The Scotsman

21 years, 5 months

Re: [Re: [linux-audio-user] building the dream Linux music box]

by Kristofer Bergstrom

Thank you all so much for your input! The information is really appreciated. Sorry to be vague and lead us off onto mics (although that info too was much appreciated.) I'll be recording a wide range of things (taiko drums, stringed instruments, singing, found sound) so will eventually need a number of microphones. Right now I've only got a Shure SM57 due to lack of funds. Hopefully this will change. :) I'm glad to hear that people think a setup or something similar would do the trick. Brian brought up the Midiman soundcard, saying it's easy to setup. And I'm always happy to support companies who put a Penguin on their box. RME has been a little stand-offish. Does anyone have any thoughts about the Hammerfall card vs the Midiman card? It looks to me like the Hammerfall card is a little more high end but if you have an external AD/DA converter, maybe it doesn't matter? Maybe ease of setup is more important than the few extra bells and whistles? I'll admit that I don't know what a lot of the specs mean for either card. Paul Davis of Ardour fame strongly recommended the Hammerfall cards but listening to Brian's music at his homepage, it sounds like he's getting great results with the MidiMan setup he's using too. Here are some links I've found: http://www.rme-audio.de/english/hammer/index.htm http://www.midiman.com/products/m-audio/dio2496.php Anyway, any thoughts from Hammerfall and MidiMan users out there? Thanks again everyone! Kris Bergstrom P.S. Brian, are you the same Brian I met at the LA LUG meeting a few weeks ago? If so I've been trying to track down your e-mail. There aren't too many Linux DJs out there and I'd love to hear more of what you've been doing. ____________________________________________________________________

21 years, 5 months

[linux-audio-user] Midiman Portman 2x4 drivers?

by Christian Schoenebeck

Hi! Are there any drivers, no matter if OSS or ALSA for the Portman 2x4? The only thing I found on the web was that somebody posted to alsa-dev, that he almost has finished writing a driver for it. That was a year ago. But on the alsa matrix the device is marked grey and unfortunately the author's email address protected. Thanks in advance Christian

21 years, 5 months

[linux-audio-user] Recommendations for 24/96 digital I/O?

by Roger Williams

I'm looking for recommendations for reliable interface components for getting 8-channel AES/EBU input into Ardour for HDR. (I'll be using external A/D converters.) -- Roger Williams <raw(a)qux.com> Qux Tool & Die, Middleborough, Massachusetts // Omne tulit punctum qui misquit utile dulci //

21 years, 5 months

Re: [linux-audio-user] Re: [Ardour-users] Re: [Alsa-devel] usb audio sound quality

by Paul Winkler

On Fri, Nov 08, 2002 at 07:13:45PM -0600, Jack O'Quin wrote: > Darn! I wish we had some way to collect all this information about > noise, low latency and other system configuration issues somewhere. > Finding what works and what doesn't from searching mailing list > archives is difficult and frustrating. I could set up a wiki with almost no effort. Would that do the trick? I started a wiki to replace the ancient Audio Quality HOWTO a long time ago, but I wasn't really happy with the wiki way of doing things so i abandoned it, thinking "I'll make this better later"... but, well, you know how later goes. :-\ you can browse and search it (but not add stuff) at: http://www.slinkp.com/LiLAQ/FrontPage > I'm imagining some sort of web database of system hardware and > software configurations with some indication of associated latency, > reliability, and noise levels. It would be interesting to look for > patterns in the data. > a wiki wouldn't be as smooth as what you're describing but it would at least provide a way that users could add comments on various hardware. could have a page for each soundcard, a page for each video card, etc. Adding pages is easy. If a wiki would not do, let's figure out the requirements and i could maybe throw something else together. -- Paul Winkler http://www.slinkp.com "Welcome to Muppet Labs, where the future is made - today!"

21 years, 5 months

Re: [linux-audio-user] Re: [Ardour-users] Re: [Alsa-devel] usb audio sound quality

by Patrick Shirkey

Jack O'Quin wrote: > > Darn! I wish we had some way to collect all this information about > noise, low latency and other system configuration issues somewhere. > Finding what works and what doesn't from searching mailing list > archives is difficult and frustrating. > > I'm imagining some sort of web database of system hardware and > software configurations with some indication of associated latency, > reliability, and noise levels. It would be interesting to look for > patterns in the data. > > I wonder if the Bugzilla bug tracking software recently discussed on > ardour-dev could be adapted to collect this kind of information? Or, > maybe it would be better to just put up a custom form on the web. > I imagine that at some stage someone is going to start going through the archives and collating this information. I am in the process of adding a rating system to the alsa soundcard matrix which could serve as the place to display it. I have the basic page ready now (learnt how to do php classes properly last night too :). I need access to the mysql server on the alsa site before I will start working on the code for the system. I appreciate if people would give me some ideas on what they would like to see represented. [He says while finally being able to listen to Roni Size in Crystal clear ALSA+ASIO] -- Patrick Shirkey - Boost Hardware Ltd. For the discerning hardware connoisseur Http://www.boosthardware.com Http://www.djcj.org - The Linux Audio Users guide ======================================== Being on stage with the band in front of crowds shouting, "Get off! No! We want normal music!", I think that was more like acting than anything I've ever done. Goldie, 8 Nov, 2002 The Scotsman

21 years, 5 months

[linux-audio-user] Burning DVD-A with own 24/96 content

by Martin Wolters

I couldn't find any information on the web about burning DVD-A (DVD-Audio) discs. Does somebody know if that is possible? What programs and hardware are required? -M PS.: I am not thinking about copying commercial DVD's but making my own 24/96 recordings and play them in my living room - if that makes any difference.

21 years, 5 months

[linux-audio-user] Re: [Jackit-devel] looking for a sound card

by Patrick Shirkey

Moved to LAU please continue this thread there. On 11/7/2002 - 03:58:38, Joshua N Pritikin said: > > i wish "The ALSA Soundcard Matrix" was more specific. Both the > CMI8738 (not working) and the Audiophile appear to have the same > level of alsa support. :-( > Saying this is one thing but actioning it is a different matter. We have a bugs section for the alsadocs and it is becoming obvious that it should be more prominently represented. I have started looking into it this past week but have no solid game plan. However, It still requires user contributions to make it work. Until now this has been very low on my priorities list along with most other people round here I think. But it seems that we have mostly covered everything else and it is becoming the next majorly requested thing. The only other way I can think of having more information about the level of support for cards instantly accesible is for someone to start doing a Linux audio hardware benchmarks site. Currently the information is covered in many places. alsa-devel alsa-users LAU LAD jackit-devel ardour-users to name a few. If you have time to read all these sites and a couple of years up your sleeve to get aquainted with the info then you will be fine. --

21 years, 5 months

[linux-audio-user] building the dream Linux music box

by Kristofer Bergstrom

Hello everyone. I'm hoping to invest in a Linux-based (debian) system to do high-quality recording of live sources (mics, turntable mixer out, etc) and playback of multichannel (4 channel, maybe more someday) computer music. I have made music with CLM but am excited to try using Csound, as well as Ecasound and Ardour for recording and editing. I've been looking around and asking questions to vendors and have heard the following suggestion for hardware: a Hammerfall soundcard and an external ADI-8AE AD/DA converter. I wanted to see if anyone had any thoughts on such a setup. As far as I can tell, the ALSA drivers support this, although one vendor said that there are only drivers for the older Hammerfall card. Any thoughts on these things? Thank you very much in advance! Kris Bergstrom ____________________________________________________________________

21 years, 5 months

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Linux-audio-user November 2002