Subject: Re: [linux-audio-user] Using DeMuDi
From: Darren Warner (darren_AT_dazwin.com)
Date: Mon Apr 21 2003 - 22:03:10 EEST
Thanks for the info Derek - this is very useful.
Where do you get sarge DeMuDi? Both agnula.org and demudi.org mention
woody & sid, but nothing in between.
Basically, I'm trying to get a musician friend off an old Atari
ST/Notator setup (which is preferable to Windows). Although problems are
to be expected at the moment, it needs to be somewhat usable. I'm hoping
this can work, because as a developer and an ex sound engineer it's an
area I can really get my teeth into :)
Darren
On Sun, 2003-04-20 at 10:01, derek holzer wrote:
> Darren,
>
> >I have a few general questions for those people using DeMuDi,
> >
> >- Which version are you using - woody or sid?
> >
> Sarge. as i mentioned in a previous email, the "official release" of
> this will be in a few weeks. i was lucky enough to do a workshop with
> one of the developers a week ago, so i really got a lot of the bugs out!I'm actually wondering if I've got the right apt sources () - you say your building jack, but running
>
> >- Is anyone using a sid IsDeMuDi over a sarge (or even woody) base Debian?
> >
>
> is there a Sid Demudi?
>
> anyway, for the record, here's what i did to get it running:
>
> i installed Woody with the ext3 file system, then updated to Sarge,
> built my own custom kernel with the low latency and preemptive patches
> [don't forget the devfs and reiserfs support!], compiled my Alsa and
> Jack, and got the Demudi apps. so, technically, i am only half-using
> Demudi. i skipped using the kernel, although i have gotten the newest
> kernel version running nicely on my laptop, there were still some issues
> with it keeping its Alsa settings and such. also, some hand-tweaking is
> required of the /etc/fstab to add the /dev/shm file system for the Jack.
> next step is to ditch the ext3 file system and replace it with reiserfs
> for smoother low latency operation, but that is beyond anything that
> Demudi would do right now...
>
> >
> >- How much software are you replacing with upstream source balls or CVSI'm actually wondering if I've got the right apt sources () - you say your building jack, but running
> >versions?
> >
> is running
> i still get Alsa and Jack from source. especially Jack, as i want to
> seriously optimize it right now, so i am trying as many tweaks as i can
> find in the compile. i am not sure if the Demudi Jack version is
> optimized for realtime operation by users [instead of root, which
> crashes the shm file system anyway under Demudi], and if it is, then it
> may not be possible to use it with an ext3 file system on a 2.4.20
> kernel without lockup. if Guenter or somebody else has patched the
> 2.4.20 Demudi kernel package against this, it is not a problem. but i
> don't know if all this is worked out yet.
>
> other than that, there are almost zero sound apps which i have gotten
> from upstream. many of the Demudi Sound Apps packages in the Sarge are
> compiled from CVS versions [espc. PD, Ardour, etc...], although probably
> not the LATEST in many cases, although the PD and related externals
> versions I can vouch for specifically as being only a week old!
>
> >- How 'usable' is your setup - I doubt that many have a workhorse
> >solution, although there seem to be a few success stories on this list
> >and elsewhere, but is it still really just experimental (in the Debian
> >sense of the word)?
> >
>
> with Jack fine-tuned, i see my setup being highly usable... plugging PD
> and Ardour together alongside my HDSP card is my main goal, and i think
> i am almost there. right now, it is just as experimental as i am.....
>
> best,
> Derek
>
>
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