Linux-audio-user January 2008

linux-audio-user@lists.linuxaudio.org

142 participants
145 discussions

Note typesetting software (was: midi sequencers)

by James Stone

> > linux really need a good midi sequencer...... > > Linux needs a lot of things. I personally think the need for a > usable, visual, flexible notation program is more acute right now than > the need for a good sequencer. Did you see NtED (recently discussed on LAD): http://vsr.informatik.tu-chemnitz.de/staff/jan/nted/nted.xhtml Not sure if this fits the bill? James

17 years, 11 months

Re: [LAU] A pc without noise!

by Paul Winkler

> Dave Phillips wrote: > At long last I've replaced the video card in my JAD box. I put in a silent GeForce 7600GS, just like in my 64Studio machine, and that incredibly annoying fan noise is *gone*. > > Now I can hear the hard drive much better. :-/ Heh, that happened to me too. That's how noise is: get rid of one noise and then you can hear something else that it was masking. My drive noise isn't too bad, mostly a little seek noise from the main drive. My audio drive is mounted in a cheap 3.5-to-5.25" adapter frame that attaches to the chassis with rubber grommets; I don't hear that one as much. But they're different makes and models of drive, so I don't know how much that has to do with it. -- http://www.slinkp.com -- http://www.slinkp.com

17 years, 11 months

HD Radio broadcasts

by The Other

Hello All, What is HD radio? A local radio station is advertising they are the first HD radio station in my listening area. Is HD supposed to mean High Definition? How can radio waves be normal for other stations, and HD for this station? Doesn't make sense to me. I suspected HD means the recordings have not been so compressed as other 'normal' radio station recordings, and you can actually hear some dynamic range. Then I saw Fons' comments in another post. ------ Next question then was why all these HR recordings sounded so much better than the average CD recording of the same music - most listeners and the also the authors of the report did agree on that. The answer suggested by the authors is quite sobering: because these recordings have been made for a niche market of audiophiles, and the sound engineers who made them were therefore not subject to the usual pressure to produce a type of sound that record companies think sells best (reduced dynamic range, a balance that emphasizes solo parts, added reverb, EQ, etc.). In other words because they were allowed to do the recording in the way they believed was right, usually employing very simple recording techniques. ---------- Now this make sense to me. Rather than having a radio broadcasted recording go for "LOUD", the powers-that-be in radio broadcasting have finally discovered that the radio audience actually prefers to hear the subtlety in the music. Took the powers-that-be long enough. Now if they would just use the same techniques for television commercials. I *hate* it when the commercial is louder than the television program. Regards, The Other

17 years, 11 months

Using a microphone to record acoustic guitar

by Leslie P. Polzer

Hello folks, will a vocals microphone produce acceptable results when used to record an acoustic instrument? Leslie -- My personal blog: http://blog.viridian-project.de/

17 years, 11 months

QRanger

by robert lazarski

http://www.lionstracs.com/store/information_pages.php?info_id=34&osCsid=ffa… Not sure if this is entirely new but the link got updated to coincide with NAMM which starts tomorrow. Short summary: Q-Ranger is an Audio/MIDI multi-track pattern sequencer application written in C++ around the Qt4 toolkit. The initial target platform will be Linux, making use of the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI. The code for Q-Ranger is developed for use under the Lionstracs Mediastation Linux OS code engine and Licensed under GNU GPL License. I Couldn't find a source download link but thought I'd mention it anyways. Robert

17 years, 11 months

Which keyboard to buy?

by Arnold Krille

Hi all, I am planning to by a second keyboard (once I really talked my wife into it:). The primary reason to do so is that a keyboard with faders and knobs costs less than for example the M-AUDIO UC33E (http://www.thomann.de/de/evolution_uc33e_usbcontroller.htm). So I am thinking about a keyboard in the 49-keys range, either the M-AUDIO OXYGEN 49 (http://www.thomann.de/de/maudio_oxygen_49.htm) or the EVOLUTION MK449 C (http://www.thomann.de/de/prod_zoom_AR_166415.html). Has anyone recommendations in regard to stability, usability and linux-/standards-compliance? (I remember a time when m-audio-devices seemed to need a firmware?) Thanks in advance, Arnold -- visit http://www.arnoldarts.de/ --- Hi, I am a .signature virus. Please copy me into your ~/.signature and send me to all your contacts. After a month or so log in as root and do a "rm -rf /". Or ask your administrator to do so...

17 years, 11 months

Changing Ardour's font size

by Leslie P. Polzer

Subject says it. I couldn't find out what one is supposed to do to be able to read anything without squinting :) I'm sure most of you have already figured this one out. Leslie -- My personal blog: http://blog.viridian-project.de/

17 years, 11 months

Re: [LAU] Need to convert 24bit/48000 to 16bit/44100 stereo on linux

by Kjetil S. Matheussen

Fons Adriaensen: > I wrote libzita-resample mainly for high-quiality real-time SRC > of multichannel audio, and it's a compromise between 'numerical' > quality and CPU load. But so far nobody has been able to hear the > difference with a no-compromise algorithm in a series of listening > tests (all audio experts and musicians). Interesting. Do you know if anyone is able to hear the difference between a 48000hz sound downsampled to 44100hz and then upsample to 48000hz again, and the original 48000hz sound? Just wondering. :-)

17 years, 11 months

xruns with Delta 66 on F7/Planet CCRMA

by Paul Coccoli

I sent this message to the Planet CCRMA list, but got no response. Maybe someone here has some suggestions? I've been running Planet CCRMA for years and have generally been happy with it. Since moving to Fedora 7, however, I can't get my jack latency settings as low as I'd like. I get periodic xruns (without any jack apps running) at anything below 1024 frames and 2 periods. The hardware is an Athlon 1800, 1G RAM, with a M-Audio Delta 66. Same hardware I've had for years, and I could swear I had better performance with FC5 (and FC2, and RH9). I've looked at everything I can think of: I've got the latest Planet kernel: paul@boon ~]$ uname -r 2.6.22.6-1.rt9.5.fc7.ccrmart I bumped the PCI latency timer up on the ICE1712 chip (the Delta): 00:0a.0 Multimedia audio controller: VIA Technologies Inc. ICE1712 [Envy24] PCI Multi-Channel I/O Controller (rev 02) Subsystem: VIA Technologies Inc. M-Audio Delta 66 Flags: bus master, medium devsel, latency 248, IRQ 20 IRQ stuff looks fine to me (audio on IRQ 20): [paul@boon ~]$ cat /proc/interrupts CPU0 0: 272253996 IO-APIC-edge timer 1: 2 IO-APIC-edge i8042 6: 6 IO-APIC-edge floppy 7: 0 IO-APIC-edge parport0 8: 0 IO-APIC-edge rtc0 9: 0 IO-APIC-fasteoi acpi 12: 4 IO-APIC-edge i8042 14: 893299 IO-APIC-edge libata 15: 5410951 IO-APIC-edge libata 16: 1602810 IO-APIC-fasteoi uhci_hcd:usb1, uhci_hcd:usb2, uhci_hcd:usb3, ehci_hcd:usb4 18: 2 IO-APIC-fasteoi ohci1394 19: 1374546 IO-APIC-fasteoi eth0 20: 3078836 IO-APIC-fasteoi ICE1712 NMI: 0 LOC: 319262183 ERR: 0 MIS: 0 The only IRQ with a higher priority is the RTC on 8 (seems sensible): [paul@boon ~]$ ps -e -o pid,cmd,pri | grep IRQ 61 [IRQ-9] 90 304 [IRQ-12] 104 305 [IRQ-1] 105 322 [IRQ-16] 110 345 [IRQ-14] 90 346 [IRQ-15] 90 673 [IRQ-6] 90 910 [IRQ-8] 120 942 [IRQ-18] 90 948 [IRQ-7] 90 1034 [IRQ-20] 115 1498 [IRQ-19] 90 Jackd priority looks right (I assume the 100 is the watchdog, 90 is the audio thread?): [paul@boon ~]$ ps -mo pid,cmd,pri -C jackd PID CMD PRI 31851 jackd -R -P50 -dalsa -dhw:0 - - - 19 - - 19 - - 19 - - 100 - - 90 QJackctl is using this: [paul@boon ~]$ cat .jackdrc jackd -R -P50 -dalsa -dhw:0 -r44100 -p256 -n2 And yet, xruns: 21:40:37.506 Startup script... 21:40:37.512 artsshell -q terminate JACK tmpdir identified as [/dev/shm] 21:40:37.877 Startup script terminated with exit status=256. 21:40:37.879 JACK is starting... 21:40:37.884 jackd -R -P50 -dalsa -dhw:0 -r44100 -p256 -n2 21:40:37.903 JACK was started with PID=32405 (0x7e95). jackd 0.103.0 Copyright 2001-2005 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 JACK compiled with System V SHM support. loading driver .. Enhanced3DNow! detected apparent rate = 44100 creating alsa driver ... hw:0|hw:0|256|2|44100|0|0|nomon|swmeter|-|32bit control device hw:0 configuring for 44100Hz, period = 256 frames, buffer = 2 periods ALSA: final selected sample format for capture: 32bit little-endian ALSA: use 2 periods for capture ALSA: final selected sample format for playback: 32bit little-endian ALSA: use 2 periods for playback 21:40:40.166 Server configuration saved to "/home/paul/.jackdrc". 21:40:40.168 Statistics reset. 21:40:40.169 Client activated. 21:40:40.171 Audio connection change. 21:40:40.199 Audio connection graph change. JACK tmpdir identified as [/dev/shm] Enhanced3DNow! detected 21:40:40.374 Audio active patchbay scan... 21:41:11.971 XRUN callback (1). delay of 11622.000 usecs exceeds estimated spare time of 5619.000; restart ... **** alsa_pcm: xrun of at least 0.054 msecs 21:41:21.684 XRUN callback (2). Any help would be appreciated. What have I missed?

17 years, 11 months

[RELEASE] jack-audio-connection-kit 0.109.0

by Hermann Meyer

Tank you very mutch that is realy welcome greatings hermann

17 years, 11 months

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Linux-audio-user January 2008