Re: [linux-audio-dev] jack_callback <-> rest of the world

2005-10-29 Thread Dave Robillard
On Sun, 2005-30-10 at 00:42 +0200, Richard Spindler wrote: > I read the tutorial at http://userpages.umbc.edu/~berman3/ , it uses > mutex+condition, is it okay to do this? Are there better ways? That's a wonderful tutorial... on how NOT to write a Jack client. (There's no lock free data structures

[linux-audio-dev] List maintainer: action required !

2005-10-29 Thread fons adriaensen
Hello, Could someone please remove '[EMAIL PROTECTED]' from the subscription list ? The last weeks I get a bounce from AOL for every message posted... -- FA

Re: [linux-audio-dev] jack_callback <-> rest of the world

2005-10-29 Thread fons adriaensen
On Sun, Oct 30, 2005 at 12:42:47AM +0200, Richard Spindler wrote: > 1. what is the preferred way of feeding data from disk to the callback? Use a separate thread to read ahead. Trigger it in the same way as you would for a thread that takes data from the callback. > 2. What is the preferred w

[linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Loki Davison
On 10/30/05, Richard Smith <[EMAIL PROTECTED]> wrote: > > software seems like it would be horrible to me. Buy or borrow a decent > > turntable. A few modern ones can play all three, for instance stuff > > from stanton. Though don't touch there needles, they are crap. To > > This may be getting to

Re: [linux-audio-dev] jack_callback <-> rest of the world

2005-10-29 Thread Lars Luthman
On Sun, 2005-10-30 at 00:42 +0200, Richard Spindler wrote: > I have two questions concerning the jack callback, > > 1. what is the preferred way of feeding data from disk to the callback? > > Is there a general design pattern agreed upon? Best Practices? The most common way is to use some varian

Re: [linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Jussi Laako
On Sat, 2005-10-29 at 22:41 +0100, Chris Cannam wrote: > Do you really think you can tell the difference between an LP and the > same LP transferred to CD? (Assuming a decent CD player, and decent > hardware used to do the transfer.) > > I have some pretty good equipment to hand, but much as I

[linux-audio-dev] jack_callback <-> rest of the world

2005-10-29 Thread Richard Spindler
Hi, I have two questions concerning the jack callback, 1. what is the preferred way of feeding data from disk to the callback? Is there a general design pattern agreed upon? Best Practices? 2. What is the preferred way to notify the non-realtime thread that something happened in the jack-callba

Re: [linux-audio-dev] Latency and feedback problems: soundcard with live microphone pass-thru, optimal solution ?

2005-10-29 Thread Dan Mills
On Saturday 29 October 2005 22:25, fons adriaensen wrote: > Frequency shifting will give a few dB extra, not more. It's based on the > fact that a typical room response will have many very narrow peaks only > a few Hz or less apart, and shifting the frequencies will smooth out the > response as th

Re: [linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Chris Cannam
On Saturday 29 Oct 2005 22:04, Jussi Laako wrote: > I've transferred number of vinyls to > CD using this equipment with very good results. Wish there were open > source or even Linux software for authoring DVD-Audio discs to take > full advantage of capabilities of vinyl hardware... Do you really

Re: [linux-audio-dev] Latency and feedback problems: soundcard with live microphone pass-thru, optimal solution ?

2005-10-29 Thread fons adriaensen
On Sat, Oct 29, 2005 at 06:43:05PM +0100, James Courtier-Dutton wrote: > Benno Senoner wrote: > > >As we know in analog PA gear you have the microphone feedback problem > >(usually it comes in form of high pitched whistle sounds). > > > This problem is common as you know, and it has been solved

Re: [linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Jussi Laako
On Sat, 2005-10-29 at 14:11 -0400, Paul Davis wrote: > i have a music hall turntable, and it is the paragon of great design > (glass platter!), reasonable cost and sweet sound. i have the mmf-5 with > a goldring cartridge, feeding a NAD phono preamp. In europe there's good availability of Pro-Ject

Re: [linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Chris Cannam
On Saturday 29 Oct 2005 19:11, Paul Davis wrote: > i have a music hall turntable, and it is the paragon of great design > (glass platter!), reasonable cost and sweet sound. i have the mmf-5 > with a goldring cartridge, feeding a NAD phono preamp. > > i am not sure what the availability is in europe

Re: [linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Paul Davis
On Sat, 2005-10-29 at 10:10 -0500, Richard Smith wrote: > > software seems like it would be horrible to me. Buy or borrow a decent > > turntable. A few modern ones can play all three, for instance stuff > > from stanton. Though don't touch there needles, they are crap. To > > This may be getting

Re: [linux-audio-dev] Latency and feedback problems: soundcard with live microphone pass-thru, optimal solution ?

2005-10-29 Thread James Courtier-Dutton
Benno Senoner wrote: Hi all, I would like to route a microphone through a sound card and back to powerful amplified speakers. As we know in analog PA gear you have the microphone feedback problem (usually it comes in form of high pitched whistle sounds). This problem is common as you know

Re: [linux-audio-dev] Latency and feedback problems: soundcard with live microphone pass-thru, optimal solution ?

2005-10-29 Thread fons adriaensen
On Sat, Oct 29, 2005 at 05:16:53PM +0200, Jens M Andreasen wrote: > Suggestion: Invert the phase of the offending microphone. This should > kill dead feadback in the frequency-band currently annoying you. The > downside is that it will also emphasize other frequency-bands that did > not pose a pro

Re: [linux-audio-dev] applying RIAA curves in software

2005-10-29 Thread fons adriaensen
On Sat, Oct 29, 2005 at 03:10:50PM +0300, Jussi Laako wrote: > >From quality point of view, at least I would recommend using IIR filters > for this... Please ignore my previous post - I misread 'FIR' where you wrote 'IIR', and that explains it all... -- FA

Re: [linux-audio-dev] Latency and feedback problems: soundcard with live microphone pass-thru, optimal solution ?

2005-10-29 Thread Jens M Andreasen
Benno! There are some missing parameters in your description, but I will assumme your problem arises out of the monitor-mix rather than the house-mix. Suggestion: Invert the phase of the offending microphone. This should kill dead feadback in the frequency-band currently annoying you. The downsid

Re: [linux-audio-dev] Re: applying RIAA curves in software

2005-10-29 Thread Richard Smith
> software seems like it would be horrible to me. Buy or borrow a decent > turntable. A few modern ones can play all three, for instance stuff > from stanton. Though don't touch there needles, they are crap. To This may be getting too OT so let me know if I need go off-list. I've been looking a

Re: [linux-audio-dev] applying RIAA curves in software

2005-10-29 Thread fons adriaensen
On Sat, Oct 29, 2005 at 03:10:50PM +0300, Jussi Laako wrote: > On Wed, 2005-10-26 at 02:41 +0200, fons adriaensen wrote: > > > Filter 1: F = 50 Hz, A = 9 > > Filter 2: F = 2120 Hz, A = 1 > > > > and add the two outputs. > > >From quality point of view, at least I would recommend using IIR

Re: [linux-audio-dev] applying RIAA curves in software

2005-10-29 Thread Richard Smith
> >From quality point of view, at least I would recommend using IIR filters > for this... > > Unless digital'ish sound is preferred... ;) Fons sent me a LADSPA and native jack filter that he wrote that will do this. I haven't tested it yet. When I finally get jack up and running on my system I'l

Re: [linux-audio-dev] applying RIAA curves in software

2005-10-29 Thread Jussi Laako
On Wed, 2005-10-26 at 02:41 +0200, fons adriaensen wrote: > On Tue, Oct 25, 2005 at 06:47:51PM -0500, Richard Smith wrote: > > > Which one is 9 the 50 or the 2120? > > Any suggestions on what program I can use to run these? Audacity will > > do LADSPA plugings but I rather something I can script