Re: [linux-audio-dev] request to use latencytest (OSDL)

2002-07-12 Thread Andrew Morton
Roger Larsson wrote: > > ... > An alternative would be Andrew Mortons amlat - it is simpler, possibly better > in an automated environment. That would require a kernel patch. I always use a mucked-with version of Mark Hahn's `realfeel' application. Simple, accurate. Attached here. /* * This

Re: [linux-audio-dev] priority inversion & inheritance

2002-07-12 Thread Juhana Sadeharju
>From: [EMAIL PROTECTED] > >Soft real-time: average case is X, standard deviation is Y >Hard real-time: worst case is X. Thanks for the defs. What is the practical worst case in standard Linux in terms of audio latency (say)? Last I checked the worst case was good enough for disk recorder/player.

Re: [linux-audio-dev] LADPSA v1.1 SDK Provisional Release

2002-07-12 Thread Steve Harris
On Fri, Jul 12, 2002 at 03:28:29 +0200, Martijn Sipkema wrote: > > So, one vote for adding the version > > to the API ? > > I would like to add that old LADSPA plugins can be easily identified > because they lack the \'version\' symbol, so there really is not segfault > problem as far as I can se

Re: [linux-audio-dev] Re: Exact desicption of PCM system for ALSA

2002-07-12 Thread Paul Davis
>> encoding, the value (generally) varies between -(2^N) and (2^N)-1, >> where N is the number of bits used to store the value. So a 16 bit >> value will vary between -65536 and 65535. there are other ways of > >Errr, I think you meant "... between -(2^(N-1)) and 2^(N-1)-1 ... " >So you get a ran

Re: [linux-audio-dev] Re: Exact desicption of PCM system for ALSA

2002-07-12 Thread Alexander Ehlert
Hi Paul, > encoding, the value (generally) varies between -(2^N) and (2^N)-1, > where N is the number of bits used to store the value. So a 16 bit > value will vary between -65536 and 65535. there are other ways of Errr, I think you meant "... between -(2^(N-1)) and 2^(N-1)-1 ... " So you get a

Re: [linux-audio-dev] priority inversion & inheritance

2002-07-12 Thread yodaiken
On Fri, Jul 12, 2002 at 04:01:29PM +0300, Juhana Sadeharju wrote: > >From: [EMAIL PROTECTED] > >> > >> I agree. That's why it is needed. And for realtime threads SCHED_FIFO/RR > > > >You lost me there. A RT scheduler is needed for RT tasks. > > You're selling RT Linux, right? Of course. But RT

Re: [linux-audio-dev] Re: Exact desicption of PCM system for ALSA

2002-07-12 Thread Paul Davis
>Yes I did have a look at this tutorial and it has been quite good, >but I don't understand the signal which is produced there. >I guess this seems to be a digital 101010... signal. >But it sounds like an disordered signal and I don't >understand how to unfluence the volume or the of frequency thi

Re: [linux-audio-dev] LADPSA v1.1 SDK Provisional Release

2002-07-12 Thread Martijn Sipkema
> >Well, it\'s not _that_ important, but there are a few good reasons... > > > >1) The LADSPA API was not designed for ABI changes (most notably the > > interface version is not exported by plugins). This means that > > old plugins that you didn\'t remember to delete/recompile can > > caus

Re: [linux-audio-dev] priority inversion & inheritance

2002-07-12 Thread Juhana Sadeharju
>From: [EMAIL PROTECTED] >> >> I agree. That's why it is needed. And for realtime threads SCHED_FIFO/RR > >You lost me there. A RT scheduler is needed for RT tasks. You're selling RT Linux, right? The standard Linux in our application can be considered as a real-time system because audio cards

Re: [linux-audio-dev] Re: Exact desicption of PCM system for ALSA

2002-07-12 Thread Alexander Ehlert
Hi Philipp, > But it sounds like an disordered signal and I don't > understand how to unfluence the volume or the of frequency this signal. > I actually have an algorythm for sine signals but it's too complex > for undestanding. It seems like you're missing the basic understanding how digitial a

[linux-audio-dev] Re: Exact desicption of PCM system for ALSA

2002-07-12 Thread Philipp Vollmer
Hello dear Dr. Nagorni, Yes I did have a look at this tutorial and it has been quite good, but I don't understand the signal which is produced there. I guess this seems to be a digital 101010... signal. But it sounds like an disordered signal and I don't understand how to unfluence the volume or

Re: [linux-audio-dev] priority inversion & inheritance

2002-07-12 Thread yodaiken
On Fri, Jul 12, 2002 at 10:31:14AM +0200, Peter Hanappe wrote: > [EMAIL PROTECTED] wrote: > > On Fri, Jul 12, 2002 at 01:40:42AM +0200, Peter Hanappe wrote: > > > >>[EMAIL PROTECTED] wrote: > >> > >> > >>>For example, in RTLinux, fifos shared > >>>between Linux (non-rt) processes and RT threads a

Re: [linux-audio-dev] LADPSA v1.1 SDK Provisional Release

2002-07-12 Thread Alexander Ehlert
> 2) Marketing. Only way to make developers believe that your >ABI is truly stable and will not change all the time is >to keep it stable. Just saying that "after this change there >won't be any modifications" every six months just doesn't cut it. >Whether this is a problem for LAD