Re: [Osw-users] Re: Trying OSW

[Amar <am...@pt...>]

Hi John,

   Yes, as Wil mentioned, I'm currently maintaining the Windows version of
OSW (as well as the Mac version and the SGI version). I haven't run Windows
98 in a while, I've mostly been using XP for development and then testing on
2000.   One of the things that often gets tweaked in OSW is the
threading/scheduling system to acheive better realtime performance, and
threading is one of the things that works differently in 9x systems versus
2k/XP systems.  I will what I can do about getting hold of a 98 system on
which to test, but I would strongly recommend upgrading of real-time Csound
produces similar results.

   The ShepardTone patches are fairly compute-intensive, I think, but the
19-tone uses only a fairly quick-and-dirty square wave generator.  I tested
the "octave keys" and they sounded right, I will perform a more solid ET
test comparing listening results with a 19-tone tuning table on a Proteus.

  I don't know much about your particular sound card, and you said that you
had not yet tried out your USB midi interface, so we can probably rule that
out in this case.  I have had experiences with USB midi devices don't always
play nice with some sound devices (e.g., Creative Extigy).

  Wil is right in saying that OSW is designed to run in real time from the
ground up, but you can stream to and from disk using the SampleStreamer,
SampleWriter and whatever processing you want in between.  It will not run
"faster than real time" until I finish development of the non-realtime clock
source, but that may not be a major issue in this case.  I'd be interested
to learn what sort of experience you have if you try using OSW this way.

   Regards,
    -Amar

----- Original Message -----
From: <wl...@wl...>
To: <jhc...@uc...>
Cc: <osw...@li...>
Sent: Wednesday, April 16, 2003 11:22 PM
Subject: [Osw-users] Re: Trying OSW


> > Wil: I downloaded OSW this PM and although it installed and ran, I'm
> > having a bit of trouble getting decent sound out of it. The Shepard
> > tone demo runs, but the sound quality is very poor, I suspect because
> > my DAC can't keep up or vice-versa, the computation is too slow.
> >
> > I couldn't get any sound out of the OSW demo at all. Perhaps it's very
> > slow to compute, but I had no indication of this.
>
> If the OSW demo you're talking about is the can_you_say.osw patch, I don't
> think it is supposed to make sound- yet. How is the sound quality poor?
> Does the audio start "crackling"? Have you tried any of the simpler audio
> patches in the tutorial/audio folder?
> >
> > The midi demo's worked, but sounded terrible and I don't think the 19
> > tone demo was actually in 19-tone ET, but the sound was so poor nothing
> > sounded right.
> >
> > I'm using a Sony Vaio tower computer, 550 Mhz Pentium III, Windows
> > 98SE, 256 Megs of RAm, a 10 gig hard drive. Csound in various versions
> > runs fine and gives me good sound in write to file, then play mode.
> > Realtime Csound sounds about like OSW, so I suspect it's my computer.
>
> You're using the windows binary? I have no information on OSW running
> under windows 98- that might be an issue. I'll cc this message to the OSW
> users' list- maybe Amar can shed some light on this. He is the
> creator/initial developer of OSW, as well as the Windows maintainer.
> >
> > The sound card is an Aureal Vortex AU8830. I have a midi interfact for
> > the USB port, but haven't had time to try it.
> >
> > I'm somewhat familiar with MAX, having gotten an alpha version from
> > CNMAT in the late 80's and have used other sound generating programs
> > such as HSML with Wires, Jsyn (the latter on my old MAC). I've even run
> > MusicIVBF on a mainframe back in the Pleistocene at UCSD.
>
> Cool. It sounds like you have a history of early adoption.
>
> >
> > Anyway, I think the OSW has a lot of potential and I like the look of
> > the GUI. Hopefully, my problems won't prove fatal. I would be willing
> > to run OSW in non-real time mode if that is possible.
>
> OSW was designed from the ground up as a realtime language. As far as I
> know, there is no way to run it in non-realtime. But, then again, realtime
> is so much more fun. : )
> >
> > --John
>
> ,Wil
>
>
>
>
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