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20661 discussions

[linux-audio-user] sampling at high frequencies

by Florin Andrei

Anyone here using 192kHz for sampling? I know that lower sampling frequencies (44.1, 48, 88.2, 96) are more popular, but i wonder if someone tried to use 176.4 or 192kHz with Linux audio software? If you did, what was the hardware (sound cards) and software (JACK? Ardour? etc.) that you used? Any problems? How many stereo channels were you able to use simultaneously (and what was your CPU and disk speeds)? Did you try to apply LADSPA filters on 192kHz channels? How long before the system became unresponsive and started to drop frames? -- Florin Andrei http://florin.myip.org/

21 years, 9 months

[linux-audio-user] Re: Using VST-Instruments with Linux and (almost) NO LATENCY

by Kjetil Svalastog Matheussen

"michael heubeck": > > hi, > > i don't know much about professional audio-applications for linux but i > want to try using VST-Instruments with linux-applications. which > applications can i tra/use? As far as I know, the only linux-program with support for vst-instruments is Pure Data, using the k_vst~ external. pure-data.sf.net www.notam02.no/arkiv/src/pd/ > is it possible to get low or almost no > tatency with the new kernel 2.6? > Yes, but your chances are probably better with 2.4. --

21 years, 9 months

[linux-audio-user] lrdf build tool changes

by Taybin Rutkin

Hi Steve, I had to apply these changes to get liblrdf to build on MacOSX. I think they should work on linux too. If they do, could you apply to the next version? Thanks, Taybin

21 years, 9 months

[linux-audio-user] RME Multiface vs. M-Audio Delta 1010

by Kjetil Svalastog Matheussen

> > I'm comparing the RME Multiface with the M-Audio Delta 1010 (the full > model, not the LT). > > Both things provide 8 balanced analog ins/outs (and balanced is very > important to me), some digital ins/outs (the M-Audio provides only > SPDIF, RME has SPDIF and optical) and MIDI. Both are fully supported by > ALSA. Both can do 96kHz/24bit. > M-Audio Delta doesn't have headphones output. > > The big difference is the price. > RME Multiface can be bought in the US for like $920 (the breakout box > plus the PCI card). > M-Audio Delta 1010 is $600 total; even if i stick to it a 4-way > headphone amp, it's still only $700. > > What do i lose if i go the M-Audio way, instead of the RME? > > I know the RME stuff are more like sound routers (can combine the > channels in a very flexible fashion), plus they do a lot of things with > 0% CPU load. > How's the M-Audio Delta in this regard? Can i do the same clever things > with it? > Since everybody is reccomending a RME card... Having administrated 5 delta cards (2*1010+1*66+2*44) for soon 2 years on linux/alsa at notam/oslo, whithout any trouble, I can safely reccomend delta. I also had an unpleasant experience this summer getting an rme card to work. There were lots of lots of trouble getting the driver to work somewhat properly. However, I think that was a digiface so you probably wont experience the same trouble. But, if I should choose, and had an unlimited amount of money, I would take the 1010 card. ~No doubt. --

21 years, 9 months

[linux-audio-user] mixer for jack

by Alexander Klosch

hi, is there a mixer available which works on top of jack, to mix the different sources? regards, kloschi

21 years, 9 months

[linux-audio-user] re: sampling at high frequencies

by BrbrOfSvl＠aol.com

->Which membrane? The basilar membrane is responsible for frequency alaysis(AFAIR), but its limited by its geometry. Doesn't it detect resonances inthe narrowing tube? Transients could be detected before the pressure wavereaches the basilar membrane, though I'm just guessing here.<- Quick review - changes in air pressure cause the eardrum to move. This causes the three little bones (hammer, anvil, stirrup) to move - these bones are responsible for a great deal of amplification of sound which is needed when you are trying to vibrate liquid from vibrating air. The last and smallest bone causes a little membrane on the outside of the inner ear to vibrate, which sets up vibrations in the fluid of the inner ear. That fluid causes the basilar membrane to vibrate (the very very short-story version of this is that the basilar membrane vibrates in different places based on the frequency). Basilar membrane vibrations, as well as the further amplification gained by active outer-hair-cell vibration causes potentials to fire in inner-haircells which form synapses with neurons which eventually send their information, cleaned up a bit, to pathways to the brain. Transients are still detected by the basilar membrane, but there are stations in the ascending pathways which deal with transient sounds differently than longer, more periodic sounds. The moral of the story is that there's still a TON of work to be done just on pitch perception - and of course even more on general auditory perception. Matt

21 years, 9 months

[linux-audio-user] Creative Extigy and Linux

by Oliver Bohlen

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello List I'm looking forward to get the Creative Extigy for my Notebook but there is one think I want to know before. My Notebook has a SiS 7012 SoundChip, working with ALSA on Gentoo Linux with Kernel 2.6.1-rc1. I want to use both Soundcards. Is this possible? As I read on http://www.cs.umass.edu/~cochran/ is the Extigy driver based on OSS. Did anyone of you have any problems with using the Extigy together with other Soundcards? Or has anyone of you experience with the Extigy and other Soundcards? Bye Olli - -- Registered Linux User Nr. 259631 http://counter.li.org/cgi-bin/runscript/display-person.cgi?user=259631 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.3 (GNU/Linux) iQEVAwUBQBLD7Fb2+hVV5H1AAQLIIggA4vgC81QOHL2Wq2a89iqpv35US+NXX2Vs ElF2g+QqkUbGe2fcK1gBEooxRtJwIa+TuiLbUFEm0U3AGsqMPOo/Ly6+/5rMbrAk 9bE/tG6qGEAlMzVEChKj3X5ZuoZQYcSLwhDab0r4FubWD3Qzcx42j4DD7pCVkbEc e2e00OQF4+6yM5guVq62IYTsHQ2c7ElSNscqFgKnaPXTJniwzeYImM8W7TeKm4ts 4zAQCrjiiwb/WRdGRIjh4bK0V6csUImLtdJbPn9bC6zgAHSXl+klJtnUA/3ZT1uR a0ckwfqIJQ2tPFVnuPixf/v5QSNTA6CibIKhTQA+pf5uT+CbQrpuFg== =ilSd -----END PGP SIGNATURE-----

21 years, 9 months

[linux-audio-user] How to set up my linux box to record an album

by Livio

Hi all, This is my first message on this mailinglist. :D I don't know too much english so sorry for all mistakes i'm going to make in this message. I would like to set up my pc to record a cd of a band. I would like to rec single instrument at time and also all the band at the same time. What software i've to use?! What hardware i need?! Thanks for the replys bye Livio PS. In Italian "se c'è qualche italiano che mi possa dare una mano sarebbe molto gradito" In English: "Is there an Italian who can help me?"

21 years, 9 months

[linux-audio-user] sound input directly to output

by wouter buytaert

Hello, for some reason, my sound input is redirected directly to the output instead of being captured by alsa/jack/ardour. I suppose there are many possible explanations, but are there easy checks to get an idea about where my sound input gets lost? Or a detailed guide about sound input and alsa and jack? Sound input has been working with ecamegapedal before I installed ardour, so I suppose it's no hardware problem. My setup: gentoo kernel 2.4.23 ASUS A7N8X-X nforce mainboard alsa snd-intel8x0 driver (working for output) jack 0.91 (output OK) jack readable clients: alsa_pcm (capture_1 & capture_2) thanks, Wouter

21 years, 9 months

[linux-audio-user] Help - with Midiman Quattro

by dave aube

I Have outputs from Quattro work great, but no inputs, and no way to adjust volume. KAMix shows proper inputs and outputs for the PCM card (second card), but when set to the Quattro card. the KAMix Window is blank for inputs and outs. Qinit shows a segmentation fault. Alsapart of Modules.conf: # Alsa sound support. # Warning: please don't modify comments over aliases 'snd-card-#' alias char-major-116 snd #module options should go here #OSS/Free portion alias char-major-14 off options snd-intel8x0 snd_ac97_clock=0 snd_enable=1 snd_index=1 options snd snd_cards_limit=2 snd_major=116 # YaST2: sound system dependent part # alias sound-slot-0 snd-card-0 alias sound-service-0-0 snd-mixer-oss alias sound-slot-1 snd-card-1 alias sound-service-1-0 snd-mixer-oss alias sound-slot-2 off alias sound-service-2-0 off alias sound-slot-3 off alias sound-service-3-0 off # uniq.virtual:USB Audio Quattro alias snd-card-0 snd-usb-audio # H0_h.AyAc5dtQ3r5:nForce2 AC97 Audio Controler (MCP) alias snd-card-1 snd-intel8x0 alias sound-service-0-1 snd-seq-oss alias sound-service-0-3 snd-pcm-oss alias sound-service-0-8 snd-seq-oss alias sound-service-0-11 snd-mixer-oss alias sound-service-0-12 snd-pcm-oss alias sound-service-1-1 snd-seq-oss alias sound-service-1-3 snd-pcm-oss alias sound-service-1-8 snd-seq-oss alias sound-service-1-11 snd-mixer-oss alias sound-service-1-12 snd-pcm-oss # end of i386 part for modules.conf # --- END: Generated by ALSACONF, do not edit. ---

21 years, 9 months

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