Linux-audio-user

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20661 discussions

[linux-audio-user] Re: [linux-audio-dev] New powermacs?

by cliffw＠easystreet.com

> Hi all, > >[snip - mac news - ] > > Please don't get me wrong. I am still in favor of Linux, obviously due > to its open architecture. But at the same time I am becoming a bit weary > of having to "hack" my advanced audio settings rather than use > user-friendly tools. That, coupled with still anemic direct vendor hw > driver support has really made me pay closer attention on Macs (as scary > as that sounds). Yet, I feel such a sense of accomplishment when my > Linux purrs just right with my desktop being uniquely configured and > tailored to my needs. After all, I am a geek. :-) And the inner struggle > goes on... > > Anyone care to comment or (please) dissuade me from potentially making a > costly mistake? ;-) > Well, i'm messing with a used iBook G3/500 right at the moment. OS X does look nice, and the few OS X audio apps i demo'd are solid. And, dual-booting w/Debian unstable was dead easy to do, i have OSS audio working jest fine with the built-in set, and i'm hoping to do ALSA via USB audio soon, which will be kewl. I like the hardware platform. The display is noticeably better than most Intel laptops, certainly better than the used ones i was comparing to. The Firewire Just Worked, right from the Debian install kernel. I've been using it with a IDE -> firewire disk carrier. The unit is solid. The built-in audio is okay, my model has no real inputs (built-in mic) - you would definately be using USB or firewire for Real Work. Using Open Firmware at boot instead of BIOS is sweet. With Linux, performance is fine, even with the 500mhz chip. The OS X on the other hand, is noticeably slooower than Linux (2.4.21 + 2.5.72 kernels ), especially at reboot. And the Mac world is insanely closed, it actually surprized _me how little choice you have with OS X - near as i can figure, you buy most everything from Apple, pay a bunch more money than a comparable M$ product, or suffer. And since they are _not a huge monopoly, they seem to have little shame about being closed - i was very amused by the way they attempt to corral the first-time user into signing up for .Mac (Apple's version of MSN) during the OS X install, iTunes also. The main thing-that-makes-me-nutbar is the keyboard layout. That's fixable with X, and you can set up keymappings with sysctl for some Mac-specific things. Main installation pain is the Mac version of fdisk, which is....terse. So in conclusion, i'd say the iBook + external converter (USB/fire) would make a fine Linux audio laptop. Get a decent sized disk, and you can dual-boot with OS X, and that will motivate you to run Linux again. :) cliffw (PS - http://www.penguinppc.org - is a good start point for Mac links) > Ivica Ico Bukvic, composer & multimedia sculptor > http://meowing.ccm.uc.edu/~ico > >

22 years, 4 months

[linux-audio-user] Mastering; Rezound, fir filter, digital clipping

by R Parker

Hi, I'm doing a study on audio mastering. Hopefully this letter will generate some correspondance from which I'll learn enough to augment a GFDL licensed document that I've been working on. The test job is an album I recorded several years ago. The source I've decided to use is 16bit 44100 audio CD. I'm restricting the applications I use to jack clients. I guess the process of copying audio and data from CD doesn't introduce any opportunity to compromise the sonic quality of the source. Am I right or wrong? Having opened the songs in Rezound, I've discovered that some of the songs have an inordinate amount of clipping--represented by vertical red lines on the time line. For the purposes of testing this is excellent because they're an opportunity to solve a common problem. The clips cause a series of questions for which I absolutely do not have definitive answers. Is what I am seeing clipping or is there a more accurate term to describe what I'm seeing? Perhaps someone could provide a technical explanation of clipping or a link to a definition. What tools do you use for eliminating clipping that already exists in a source? I don't care at all about preventing the problem. For the moment I am using the Rezound Arbitrary Fir Filter to identify the hz where the clips occur and am performing a decibal cut on the problem range. The interface for this filter enabled me to do some detailed work. Reguardless of how detailed I get, there's an audible consequence to eliminating the clips. I configured a preset with the minimal settings required to eliminate the clips but the result is audibly unacceptable. Another preset eliminates about 80% of the clips and audibly is marginally acceptable if applied to the entire file. What's interesting about this specific set of clips is that they are mostly inaudible. The clipping occurs around 10kHz -> 15kHz and are almost all within the high hat. This causes me to wonder: *how Rezound is configured to conclude that there are clips *should measuring for these types of problems be user configurable or does a technical specification define when a clip occurs *can engineers safely ignore inaudible clips and tell their clients that there's room to fudge and not to worry Is a Fir filter a good tool for addressing the problem of digital clips or is there something better? Are there alternative Fir filter algorithms that produce better results than the one being used in Rezound? I haven't a clue what Rezound uses. Anyway, there's a few of my questions which I realize are probably enough to exhaust anyone's patience. Reguardless, I really would appreciate your thoughts. ron __________________________________ Do you Yahoo!? Yahoo! Calendar - Free online calendar with sync to Outlook(TM). http://calendar.yahoo.com

22 years, 4 months

[linux-audio-user] horgand-1.01

by holborn

Hi! again ... Hi! New Release : horgand 1.01 News in v1.01 (21/06/2003) ------------- -Fixed Bass frequencys, now are tuned :-) -Master Transpose transposes the bass line too. -Master MasterTune tunes the bass line too. -Added more chords to recognition. -Fixed small bugs in split, chords ... REQUERIMENTS: * FAST COMPUTER * LINUX * LIBSNDFILE * ALSA * JACK * FLTK 1.1 Web Page : http://personal.telefonica.terra.es/web/soudfontcombi/ Josep

22 years, 4 months

[linux-audio-user] mplayer and alsa plugins

by Anthony

I've been trying to get mplayer to work with my delta44. I have a working plug pcm type: pcm.dplug { type plug slave.pcm ice1712 } and $ mplayer -ao alsa9:dplug foo.avi will play audio, but no more than a few frames of video. If I look at the verbose output I see; alsa-init: requested format: 48000 Hz, 2 channels, Signed 16-bit (Little-Endian) alsa-init: compiled for ALSA-0.9.4 alsa-init: soundcard set to dplug alsa-init: pcm opend in block-mode alsa-init: chunksize set to 1024 alsa-init: current val=7, fragcount=7 alsa-init: unable to set periods: Invalid argument alsa-init: got buffersize=26212 The number of periods the driver requests is 7 which the code obtains by calling snd_pcm_hw_params_get_periods_max(). So my question is, what should this value be for a plug, should it be the same as the underlying slave. Is the ice1712 not reporting the correct maximum? The maximum jackd will start with is 5 periods so there seems to be something wrong here. --ant

22 years, 4 months

[linux-audio-user] silly midi volume stuff :)

by Ryan Underwood

Hi, I have a MIDI card (Yamaha DB50XG) that I use as a performer for my old Ensoniq controller. It works fine. However, it seems that the Ensoniq keyboard sends the velocity information at only half what it should be -- if I pound on the keyboard, the volume is increased from normal playing, but still rather quiet. If I play a midi file through tse3play or something similar, the volume is full. To get around this problem, I have two sysex files; I cat volume_high.syx > /dev/midi when I want to use the keyboard, and cat volume_low.syx > /dev/midi when I want to play midi files. The sysex's each set the midi master volume to a level which is comfortable to use with either. However, this feels like a kludge. In addition, sometimes annoying things happen like after I've been playing the keyboard at its comfortable volume, I visit a web page with a MIDI on it, and it plays at 250% volume and blasts my ear out. Or I play a game like DOOM which has hardware MIDI support and have to lunge for the volume on my mixer to keep from disturbing the neighbours. :) The keyboard is a Ensoniq SDP-1 from 1986 or so. I tried the volume setting on the keyboard in the hopes that it would modify the volume of the notes sent to the midi card, but it seems to have no effect. (Is it broken possibly?) I was thinking about hacking the mpu401 driver so that when midi data is received externally, it rewrites the velocity somehow before it reaches the midi device. Or if that isnt possible, when a file is played to /dev/midi, after the file sets master volume, reset it to a lower value. Thoughts? Suggestions? This has been annoying me for a while now. :) Thanks, -- Ryan Underwood, <nemesis at icequake.net>, icq=10317253

22 years, 4 months

[linux-audio-user] thanks

by Dan Easley

at the risk of degrading what I'm appreciating - I just wanted to send a note thanking y'all for the great discussions and high signal-to-noise ratio of this group. I've been lurking for three months, waiting till I have the finances to buy equipment to try all this stuff - and sitting on this list has been highly educational. the recent mastering conversation is really diggable. thanks! -- Rev. Dan Easley http://burntpossum.com

22 years, 4 months

[linux-audio-user] how to set otput line level of delta 66 to -10dbv

by rob

Hi, How do I set the ouput line level of my delta 66 to -10dbv? Under windows this can be done using the delta control panel but I can't see any option for this in envy24control nor alsamixer. thanks -- rob <mailingLists(a)pangolin.org.uk>

22 years, 4 months

[linux-audio-user] Audigy 2 and DSP24

by Khadiyd Idris

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I'm looking for inexpensive soundcard but with high quality... for recording dan monitoring I found two candidates: - - Soundtrack DSP24 (seems hard to find it in local store) - - SB Audigy 2 Can some1 share experience on these two soundcard in linux... regards, khad -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.1 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQE+7sz81MQpYWgG+JsRAis5AJ4kPKgTZJ4MPZ9ePP6GCaUm0/xILACfX4q2 IvUwuMIFf2it+TAYUT76+h0= =6PBD -----END PGP SIGNATURE-----

22 years, 4 months

[linux-audio-user] Basic linux audio problems

by Michael Tench

I'm having trouble getting my audio hardware to work under linux. I'm not sure if this is the correct place to ask a qustion like this though... I'm getting noise on the audio input with a faint shadow of what I'm trying to record. I'm trying to get one sound card working first and hope to add one or two more. Michael Tench

22 years, 4 months

[linux-audio-user] LAU meeting next week at the Expo?

by Daniel James

For those list members who are going to the postponed LinuxUser & Developer Expo next week in Birmingham (that's England, not Alabama) is there interest in rescheduling the informal linux-audio-users meeting I originally proposed? I'm going to be there all three days, but I'd prefer to meet up on the Thursday, say 12.30pm for lunch? Meet at the Rosegarden stand? Hopefully it will have calmed down a bit by then and I'll be able to get away from our own stand... Cheers Daniel

22 years, 4 months

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