Linux-audio-user January 2012

linux-audio-user@lists.linuxaudio.org

133 participants
123 discussions

by Folderol

This is a three part multi-layer improvisation, that hopefully pushes out my boundaries a bit more. I hope you like it. http://www.musically.me.uk/music/Stranger.ogg -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

12 years, 3 months

A new Bach 3-part Invention in C minor

by Julien Claassen

Hello everyone! OK, just recorded: http://juliencoder.de/nama/bach-c_minor_sinfonia.ogg http://juliencoder.de/nama/bach-c_minor_sinfonia.mp3 It's played on a piano and processed by a reverb from the concertgebouwe (Amsterdam). Nothing fancy. :-) I know, there are one or two problems in there, which shouldn't be, but overall it was the best I could do tonight and I feel rather impatient. :-) Enjoy, anycomments welcome! Warmly yours Julien =-=-=-=-=-=-=-=-=-=-=-=- Such Is Life: Very Intensely Adorable; Free And Jubilating Amazement Revels, Dancing On - FLOWERS! ====== Find my music at ====== http://juliencoder.de/nama/music.html ..................................... "If you live to be 100, I hope I live to be 100 minus 1 day, so I never have to live without you." (Winnie the Pooh)

12 years, 3 months

Bathyal - a simple Csound composition

by Dave Phillips

Greetings, http://linux-sound.org/audio/bathyal.mp3 http://linux-sound.org/audio/bathyal.ogg A very simple ambient study created with Jean-Pierre Lemoine's AVSynthesis (sound by Csound) and edited with mhWaveEdit. Best, dp

12 years, 3 months

Freesoundscape 1

by Dave Phillips

Greetings, I've posted a little piece to SoundCloud : http://soundcloud.com/davephillips69/freesoundscape-1 For the unclouded it's also available from my ftp site : http://linux-sound.org/audio/freesoundscape01.mp3 http://linux-sound.org/audio/freesoundscape01.ogg Fun with the Freesound database and other goodies in Ardour3. Best, dp

12 years, 3 months

monitor specifications

by Brendan Jones

Hi all I've just moved to Germany and am still setting up my new studio. While its insanely quick and easy to buy gear here I was thinking of rolling my own studio monitors (with the help of a very handy father-in-law) Has anyone here done this and is it possible to do this oneself? Some plans/specifications would go a long way (or should I not bother) What I'm looking at is something similar to the yamaha HSM80's or the Adam A7's many thanks Brendan

12 years, 3 months

Neophyte questions re: selecting an audio interface

by Chris Metzler

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi. After a much longer delay than I wanted, I'm finally getting the chance to get into recording. Right now I only have consumer audio line-in capability and need to get a better interface. To help decide what to get, I've been reading old posts on this mailing list and have come up with what seem to me to be the pros/cons of PCI, USB, and FireWire interfaces. I'm hoping that folks having more of a clue than I do will look at this list below and tell me if what I've concluded is right/wrong, as well as any pros/cons I may have missed. At the end, I've tacked on some additional questions that have come up while reading. I really, really appreciate any advice you can give. Thanks! ===== - -Pros/Cons of Interfaces- PCI - --- Pros: - - Low latency - - High data rates -- can handle lots of inputs/outputs at high sample rates Cons: - - Outdated technology -- PCI slots being slowly phased out of modern motherboards - - Interface not portable -- can't use it with a laptop - - Latency tuning possibly required (identifying IRQs associated with PCI slots and picking slot accordingly) - - Computer-caused interference noise possible unless audio converted to digital domain outside computer ==> breakout box. But PCI interfaces with breakout boxes tend to be pretty expensive. OTOH, no breakout box = lots of cables going to the back of the computer. USB - --- Pros: - - Interface portability -- everything has a USB port these days - - Current technology - - Relatively cheap - - Outside computer ==> less electrical interference noise Cons: - - USB 1.1 devices are generally well-supported; but USB 2 devices probably aren't. - - USB 1.1 limitation means serious sample rate/channel # limitation. A single 24/96 channel means 2.3Mbps; 12Mbps nondirectional hard limit under USB 1.1 so only 2 channels full duplex, or 4-5 inputs/no outputs, possible. 1394 - ---- Pros: - - High data rates - - Outside computer ==> less electrical interference noise - - Portable; no fiddling with internal cards. - - More options supported at high data rates than USB. Cons: - - Long-term viability of 1394 interface? Will my next computer have one? Will a future laptop? ===== - -Questions I have- 1. Some PCI interfaces (like the Delta 1010LT) have RCA jacks rather than 1/4". What about issues relating to noise/degradation introduced by a 1/4"-to-RCA adapter? I've read elsewhere (on the M-Audio forums) of people complaining about unpleasant noise with guitars when using an adapter that's then plugged into an RCA plug on the Delta 1010LT. 2. Some interfaces seem to have a combination jack that allows XLR and 1/4" inputs. Are these good? Or is there a tradeoff between convenience and sound quality? 3. When selecting an interface, I don't want to just look at what I need right now, because I don't want to replace my interface every 1-3 years. But I sometimes see people selling audio interfaces with the explanation that what their selling is "more than they need." Maybe they're just recovering some money; but are there reasons (other than cost) one *shouldn't* pick up an interface with a lot of excess capability? Put another way, if you have the chance to pick up at a really good price Z-Audio's UberSuperDuperInterface, with a gazillion ins/outs and a lot of features, and right now you only need a small fraction of what it can do, are there non-cost reasons why you *shouldn't* get it? 4. I'm so confused about what I can plug into an interface's 1/4" jack at this point that I'm having trouble even articulating questions. Here's my best shot: a) Guitar cables typically use a TS connector while line-level devices (analog outs on drum machines, keyboards, etc.) typically use TRS, right? I'm presuming there's a difference in voltage range as well (hence why guitars aren't referred to as line-level)? b) Am I correct in thinking that a cable with TS connectors is unbalanced and a cable with TRS connectors is balanced? c) My understanding is that in order to plug a guitar into a balanced input, there needs to be a DI box in-between to change the impedance. But in advertising blurbs, some 1/4" inputs on interfaces are billed as accepting balanced or unbalanced input. Does that mean that both guitars and line-level devices can be plugged into them? If an interface only has mic/line jacks, does that mean you *must* get a DI box to plug in a guitar? d) Since guitars aren't at line level, do they need preamplification like microphones do? Or if an interface has unbalanced inputs, can you just plug a guitar in and go? ===== Thanks much for any and all help! - -c - -- Chris Metzler cmetzler(a)speakeasy.snip-me.net (remove "snip-me." to email) "As a child I understood how to give; I have forgotten this grace since I have become civilized." - Chief Luther Standing Bear -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.10 (GNU/Linux) iEYEARECAAYFAk8HGDQACgkQEqzZtgaaqqGJUQCgm0/99VVOhbnbz5O0s4sT0AZQ 1ecAoIGucbp0UN4M6Ib4a0yTI3hytuHE =Bxcx -----END PGP SIGNATURE-----

12 years, 3 months

Re: [LAU] monitor specifications

by Ralf Madorf

On Sat, 2012-01-07 at 12:00 +0000, linux-audio-user-request(a)lists.linuxaudio.org wrote: > Message: 2 > Date: Sat, 07 Jan 2012 01:03:22 -0500 > From: Al Thompson <althompson58(a)gmail.com> > On 01/06/2012 12:17 PM, Brendan Jones wrote: > > I was thinking of rolling my own studio monitors > > is it possible to do this oneself? > It's "possible." I wouldn't really recommend it though. +1 I also won't recommend to do it. It's time consuming and costs lot of money, good luck and perhaps some knowledge. OTOH, if you've got much time and a lot of money, you might build a better monitor than there's on the market. Trail and error is how people from rich families build some good pro-audio gear. The VM-1 microphone is such an example. Patience and money in the beginning is all you need. You even don't need knowledge that much.

12 years, 3 months

Re: [LAU] monitor specifications

by Ralf Madorf

On Sun, 2012-01-08 at 12:00 +0000, linux-audio-user-request(a)lists.linuxaudio.org wrote: > Message: 3 > Date: Sat, 07 Jan 2012 15:47:56 +0100 > From: Guido Piazzi <guido(a)fotocaos.it> > Subject: Re: [LAU] monitor specifications > - Google for "Auratone 5C": they should be the easiest studio > monitors > to clone (single driver, no hi-fi at all), and a very useful tool in > your studio even when you already have "real", good monitors. Auratones are used to have an impression of how the mix will sound on variety of consumer gear, they are not used to do a complete mix. More of a mix is done by using near field monitors. If somebody don't has much money, it's better to buy monitors, than to build monitors. If somebody has lot of money, it also might be more comfortable to by monitors. If somebody is in a financial crisis, I recommend to buy RTF B3010 HIFI at Ebay. They are from the GDR and today small radio stations and small audio studios use them as near field monitor here in the FRG. I'm using them myself. A pair costs 50,-€ at Ebay. They aren't very good, but you still can buy monitors for 1000,- € that are less good. DIY for gear like monitors is risky. - Ralf

12 years, 3 months

scheduled server downtime - 10/Jan/12 - linuxaudio.org

by Robin Gareus

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi *, linuxaudio.org will be offline for scheduled server maintenance on Tue, 10 Jan 2012 14:00 UTC for about 2-3 hours. All online services will be unavailable during that time. If all goes well (new disks, fsck, kernel-update,..) the actual downtime will be much shorter.. thanks for bearing with us, robin -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEARECAAYFAk8IZxUACgkQeVUk8U+VK0KJXgCgjbxcqXk4U9tzzBjWDbY/F7B9 RkQAoLHYKxinF9fWLkOyzJMyuRqqSKIP =U5Uj -----END PGP SIGNATURE-----

12 years, 3 months

pulseaudio in realtime mode

by Emanuel Rumpf

I can't start pulseaudio in realtime mode: I: module-jack-sink.c: JACK buffer size changed. I: module-jack-sink.c: JACK thread starting up. I: core-util.c: Successfully enabled SCHED_RR scheduling for thread, with priority 9. I: core-util.c: Successfully enabled SCHED_RR scheduling for thread, with priority 13. W: module-jack-sink.c: JACK error >Cannot use real-time scheduling (RR/67)(1: Operation not permited)< W: module-jack-sink.c: JACK error >JackClient::AcquireSelfRealTime error< But /etc/secuity/limits.conf @audio - rtprio 99 @audio - nice -20 @audio - memlock 6000000 @pulse-rt - rtprio 99 @pulse-rt - nice -20 @pulse-rt - memlock 6000000 groups user user dialout cdrom audio plugdev lpadmin pulse admin sambashare pulse-rt -- E.R.

12 years, 3 months

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Linux-audio-user January 2012