[PD] IEM's [hdspmmixer] with hdsp multiface

Rich E reakinator at gmail.com
Tue Aug 29 03:20:22 CEST 2006


For me, I would like to use the Behringer rotary or fader box to control the
hdsp driver directly.  It seems that your object would be a nice way to do
this without tying up the entire midi box.

I don't understand how the madi works I guess; when you turn up one level,
all 8192 values are sent to the driver? Or is this just on startup.

Rich

On 8/28/06, Winfried Ritsch <ritsch at iem.at> wrote:
>
> Hello,
>
> > > I just came across this object in the cvs that gives access to the
> hdsp
> > > 'madi' mixer in pd, which is great.  Will it work with my hdsp
> interface
> > > as well?  I can't get it to 'find' and useable soundcards, whereas pd
> is
> > > using it fine.
> >
> > as far as i know, [hdspmmixer] is really _only_ for the madi. (wini is
> > not here for the next 2 weeks, so he cannot be asked).
> >
> > the main reason for this object was, that there was no mixer (gui) at
> > all for the madi, whereas there IS a hdsp-mixer for the multiface and
> > the like.
>
> status report:
>
> I started it for our 3D-Mixer to use outputs as Group outputs and with
> the "number box Matrix"-Gui so you have a matrixmixer. It should work on
> the
> hdsp cards also, but i havent tested it hard (its cvs now). I hope I will
> finish this in next 2 weeks.
>
> The main problem was that on the madi we have (64+64)*64=8192 Fader and
> therfore numberboxes as control, which makes pd slow. Even with 4bytes
> this
> exceeds 16k-limit on ioctl for madi to get it in one call, so it has to
> make
> a lot of sytemcalls if also monitoring them. So the goal was to extend the
> alsadrivers for memory-mapping of faders and additional power and
> peakmeters
> for in and outs. This would reduce a lot of systemcalls for low latency
> but I
> dont know if it will ever work... any hints.
>
> So its a good idea to make it compatible for als hdsp cards, but I have to
> change the arguments so the soundcard can be set, even if there are more
> than
> one in the computer.
>
> mfg winfried
>
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