Linux-audio-user

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20713 discussions

[linux-audio-user] SpiralSynthModular 0.2.0

by Dave Griffiths

Hi everybody, SpiralSynthModular 0.2.0 is now availible for you to play with, the changes are much bigger than this little changelog suggests ;) Audio engine rewritten to be multithreaded Jack support via the JackPlugin --Realtime commandline option (as root) runs ssm audio in SCHED_FIFO LADSPA plugin much improved with built in GUI generator App help added with Helptext for all of the plugins One to many connections means the splitter plugin is now redundant Numerous fixes, additions and GUI improvements http://sourceforge.net/projects/spiralmodular/ http://www.pawfal.org/Software/SSM/ Happy new year! dave

23 years, 2 months

[linux-audio-user] HDSP 9652 MIDI Timing

by Mark Knecht

Paul, I've done a bunch of work over the last few days with a problem I was experiencing using Rosegarden to play MIDI and then receive and record the audio from external sound sources in Ardour. First, yes, it really works, and actually works pretty nicely. Jack, Ardour and Rosegarden are all playing nicely together. However, I have found that: 1) There is a severe timing problem when using the HDSP MIDI interface under Linux. Over time the HDSP 9652 just gets further and further behind. 2) There is no problem with the HDSP MIDI interface under Windows. 3) Thee is no problem with the MidiMan 2x2 interface under Linux. The problem seems to be pretty clearly the way the Linux stack is using the HDSP 9652 MIDI interface. I'm guessing it's a driver problem, but I don't want to color the perception. I know it's a newer driver. How can we go about debugging this and getting it fixed? I can post mp3's of all these cases for people to hear if it is desirable. I have lots more technical data to relate once we decide how to go about solving the problem. Thanks in advance! The fact that I have all this software working as well as it is is a great accomplishment for me, and due to a lot of great programmers out there like you guys! Cheers, Mark

23 years, 2 months

[linux-audio-user] 24bit 96khz cards that work well

by Brian Redfern

Well, I figured out that the culprit to my xrun problem wasn't my 533mghz processor, its my envy24 chipset based card, from the alsa wiki: "Many but not all users complain about sound glitches. This may be due to the cards being IRQ hungry. (VU meter interface?) -- Tobiah" Given that the evil envy24 chip is in a lot of cards out there, I'm wondering what cards people have had better results with? http://www.brianredfern.org

23 years, 2 months

[linux-audio-user] What wave-editor to use for voice removal?

by Remco Poelstra

Hi, For a musical I've to remove the background choirs from a karaoke cd. The CD sounds like it's MIDI, and it's some simple music. I hope I can remove the choirs by overwriting them with other parts of the song that have the same instrumental parts. The problem is that I can't find a good editor to do so. I need some multitrack capabilty, to lay all the different parts on different tracks for easy editing. I need some form of volume-envelope/automation for smooth fading of the tracks (fade in/out plugins are not an option because I need to tweak it and that's difficult with plugins that work on selections). The obvious candidates like audacity and ardour don't work, because audacity has no markers, so I can't find back the positions from where I cut and ardour is too buggy to use. I've looked at linuxsound.at for editors, but most are still too much under development. I hope someone here can give me a good hint on what editor can be used. Perhaps I missed a feature in one editor that can help me? What editor would you choose? Thanks in advance, Remco Poelstra

23 years, 2 months

[linux-audio-user] want a midiman portman 2x4 parallel port midi interface?

by Matthew Yee-King

Hello I'm clearing out all my old guff and i found a midiman portman 2x4 parallel port midi interface. Last time i looked ( a year and a half ago) there were no linux drivers, but if anyone wants it, i can send it to them. mail me off the list if you want it. you'll have to pay the postage. cheers + good new year matthew

23 years, 2 months

[linux-audio-user] new computer woes

by Anthony

Thought I'd post to see if anyone has any advice. I've just built a new SMP machine: Asus A7M266-D, 1.0 Ghz Athlons * 2. I got some nice fans from endpcnoise.com (Molex) that are virtually silent and a Power Supply which is louder than what I'd hope but very reasonable for 400W's I suppose (dunno). I installed gentoo, latest alsa, etc... Unfortunately playback is distorted during video load. It is *not* a CPU load issue - I can playback just fine while compiling the kernel with make -j3. If I scroll pages up and down in galeon the sounds slows down :o. Jack doesn't report Xruns but sometimes delays when I do this. This occurs both with the onboard C-media chip and my Delta 44. I struggled for a long time to get the IRQ's not to share. I tried all the suggestions in the Audio Quality HOWTO. The video card is a PCI GForce 2. It was in my old machine and didn't cause any problems (while my old onboard AGP did create some noise). The only thing I can find is the PCI Latency settings are all set to 32. This seems odd I suppose, so I tried higher settings for the video to give it more bandwith and other variations with no success. I might go out and buy an inexpensive AGP card tomorrow, but I'd hate to find out the problem is deeper than that. Kernel is 2.4.20 vanilla tried with and without lowlat. Maybe I should back down to 2.4.19? Any suggestions? TIA --ant

23 years, 2 months

[linux-audio-user] Re: linux-audio-user digest, Vol 1 #162 - 9 msgs

by dietrich.heese.boutin＠utoronto.ca

Hello, I was wondering if anyone here had any experience using the new demudi/agnula beta distro? Reason being that I would like to know the process for downloading the iso and extracting it before burning. Furthermore, will it be possible to boot from this cd or is really only an upgrade to a debian system. Thanks for any help --DHB

23 years, 2 months

[linux-audio-user] Music Construction Set

by JSusanj＠aol.com

I recently joined a choir and I find myself behind since everyone else is intimately familiar with the music. I loaded up the Music Construction Set on my Commodore 64 and it is working out OK. However, I really would like an equivalent program for Linux. I need to be able to put notes on a staff to match the sheet music and then I need to play it back. The program has to be simple to use and easy to learn. So far I have found some very powerful programs but with power comes complexity so that none seem to fit my requirements. Is there anything available to do what I want? Jeff S.

23 years, 2 months

[linux-audio-user] No such device using ALSA drivers

by Reinier Bos

Hi, I'm trying to use mplayer's ac3 passthrough option, with the ALSA drivers, but I get the following error: alsa-init: requested format: 48000 Hz, 2 channels, AC3 alsa-init: soundcard set to iec958:AES0=0x2,AES1=0x82,AES2=0x0,AES3=0x2 ALSA lib pcm_hw.c:866:(snd_pcm_hw_open) open /dev/snd/pcmC0D3p failed: No such device alsa-init: playback open error: No such device if I do an ll on the /dev/snd/pcmC0D3p the permissions, etc look fine: - ll /dev/snd/pcmC0D3p crw-rw-rw- 1 root root 116, 19 Dec 26 17:54 /dev/snd/pcmC0D3p When I try to cat the file, it gives me the same error, though. Does anyone have any ideas? Regards, Reinier.

23 years, 2 months

[linux-audio-user] USB MIDI and Audio

by Joseph Zitt

I'm pleased to say that the Oxygen 8 now works with my RedHat-based laptop, after installing the latest stuff from Planet CCRMA. The only problem is that now my USB Audio interface fails. ALSA appears to be starting OK: [root@gimel jzitt]# /etc/rc.d/init.d/alsasound start Starting sound driver snd-usb-audio [ OK ] Starting sound driver snd-usb-audio [ OK ] Starting sequencer driver snd-seq-midi [ OK ] Restoring sound driver settings [ OK ] [root@gimel jzitt]# But jack hangs: [root@gimel jzitt]# jackstart -R -d alsa -d hw -r 44100 jackd 0.41.1 Copyright 2001-2002 Paul Davis and others. jackd comes with ABSOLUTELY NO WARRANTY This is free software, and you are welcome to redistribute it under certain conditions; see the file COPYING for details loading driver .. creating alsa driver ... hw|1024|2|44100|swmon starting engine cannot lock down memory for RT thread (Cannot allocate memory) **** alsa_pcm: xrun of at least 0.074 msecs (and there it sits until I do a ^C) I'm also seeing an error from lsusb for the Audio interface: Bus 001 Device 012: ID 0582:0006 Roland Corp. Device Descriptor: bLength 18 bDescriptorType 1 bcdUSB 1.00 bDeviceClass 0 Interface bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 8 idVendor 0x0582 Roland Corp. idProduct 0x0006 bcdDevice 1.10 iManufacturer 1 Roland iProduct 2 UA-30 (44100Hz, Analog REC) iSerial 0 bNumConfigurations 1 cannot get config descriptor 0, Connection timed out (110) Language IDs: (length=4) 0409 English(US) ...though the Oxygen 8 looks OK: Bus 001 Device 011: ID 0763:1015 Midiman Device Descriptor: bLength 18 bDescriptorType 1 bDescriptorType 1 bcdUSB 1.00 bDeviceClass 0 Interface bDeviceSubClass 0 bDeviceProtocol 0 bMaxPacketSize0 64 idVendor 0x0763 Midiman idProduct 0x1015 bcdDevice 1.20 iManufacturer 0 iProduct 0 iSerial 0 bNumConfigurations 1 Configuration Descriptor: bLength 9 bDescriptorType 2 wTotalLength 39 bNumInterfaces 1 bConfigurationValue 1 iConfiguration 0 bmAttributes 0xa0 Remote Wakeup MaxPower 0mA Interface Descriptor: bLength 9 bDescriptorType 4 bInterfaceNumber 0 bAlternateSetting 0 bNumEndpoints 3 bInterfaceClass 255 Vendor Specific Class bInterfaceSubClass 0 bInterfaceProtocol 0 iInterface 0 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x81 EP 1 IN bmAttributes 3 Transfer Type Interrupt Synch Type none wMaxPacketSize 32 bInterval 1 Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x82 EP 2 IN bmAttributes 2 Transfer Type Bulk Synch Type none wMaxPacketSize 32 bInterval 0 Endpoint Descriptor: Endpoint Descriptor: bLength 7 bDescriptorType 5 bEndpointAddress 0x02 EP 2 OUT bmAttributes 2 Transfer Type Bulk Synch Type none wMaxPacketSize 32 bInterval 0 Language IDs: (length=4) 0409 English(US) Does this suggest anything (other than what we could tell from my earlier posts)? -- | jzitt(a)josephzitt.com http://www.josephzitt.com/ | | GPG: A4224EFA http://www.mp3.com/josephzitt/ | | == New book: Surprise Me with Beauty: the Music of Human Systems == | | Comma / Gray Code / VoiceWAVE Silence: the John Cage Discussion List |

23 years, 2 months

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Linux-audio-user