Subject: MAX Digest - 28 Apr 1999 to 29 Apr 1999 (#1999-130)
Date: Fri, 30 Apr 1999 00:00:11 -0400
From: Automatic digest processor 
Reply-To: MAX - Interactive Music/Multimedia Standard Environments
     
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There are 6 messages totalling 173 lines in this issue.

Topics of the day:

  1. multiple KORG 1212 ?
  2. MAX manual .pdf?
  3. usb midi interfaces
  4. supersonics (3)

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Date:    Wed, 28 Apr 1999 22:13:37 -0700
From:    David Zicarelli 
Subject: Re: multiple KORG 1212 ?

Hans Tutschku  writes:

>would it be possible to access multiple Korg 1212 cards in one computer
>from MSP.
>What would be the dac~ numbers?

The MSP audiodriver for the Korg 1212 only supports one card.
You might try your luck with an ASIO driver for the 1212 using
MSP's ASIO support audiodriver.

Assuming that the Korg ASIO driver does support two channels...

Since each card has 12 channels, you'll only be able to use 4
channels on the second card, since MSP is limited to 16 channels.
The numbers would be 13, 14, 15, and 16, and you don't really
have a choice of which outputs those channels are going to be...
they're whatever the ASIO driver decides will be its
thirteenth, fourteenth, fifteenth, and sixteenth channel.

David Z.

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Date:    Thu, 29 Apr 1999 03:20:40 -0400
From:    Gordon Adams 
Subject: MAX manual .pdf?

Special thanks to Peter for his udraw object...

As long as we're batting 1.000, I noticed that the MSP/MAX bundle has
all-electronic documentation.  Might this mean that the MAX 3.5 manual is
available for download in .pdf somewhere?  If it's not posted publicly
somewhere, would there be legal or ethical ramifications to me asking
someone to pass such along to me (as a registered owner of 3.5 -- or not,
even)?

Thanks for all your help,
Gordon.

----------------------------------------

Peter Swinnen wrote
>Sounds as if my object udraw could be helpful here: does all lcd does +
>proper refresh, all quickdraw commands, saving to disk (PICT-file) etc.
>
>You can check it out at my website:
>
>http://www.ping.be/peterswinnen/
>
>It is also on the last Ircam Forum CD, but has been updated meanwhiles
>(as have a lot of my other objects too), especially for better working in
>Overdrive and on 68k machines, apart from several bug fixes.
>Documentation has been improved also.

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Date:    Thu, 29 Apr 1999 09:13:58 PDT
From:    v a u g h n 
Subject: usb midi interfaces

        has anyone actually used any of the usb midi interfaces that were
just released?

thanks
v~

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Date:    Thu, 29 Apr 1999 21:20:54 +0200
From:    Jeffrey Burns 
Subject: supersonics

Does anyone know how to get rid of tones above 22000 Hz in MSP? I've tried
using a cycle object to produce a frequency of 43660 Hz, which comes out
sounding like 440 Hz because of the Nyquest effect. Then, I tried filtering
it out with several different low pass filters, including several fancy vst
plugins like GRMBandPassVST. No effect! The filters all handle the
supersonic tone just like the real 440 Hz tone. Or is cycle not really
producing supersonics? Any help appreciated.

Jeff Burns

http://www.snafu.de/~jeff

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Date:    Thu, 29 Apr 1999 16:00:29 -0400
From:    Stonewall Ballard 
Subject: Re: supersonics

The alias tone exists at the moment it's created. The oscillator
itself is producing the 440 Hz tone. There is no way to filter it out
because there is no way to distinguish it from a "real" 440 Hz tone.
This is inherent in digital (sampled) systems.

The only way to avoid this problem is to not generate the high
frequencies in the first place.

 - Stoney

At 9:20 PM +0200 4/29/99, Jeffrey Burns wrote:
>Does anyone know how to get rid of tones above 22000 Hz in MSP? I've tried
>using a cycle object to produce a frequency of 43660 Hz, which comes out
>sounding like 440 Hz because of the Nyquest effect. Then, I tried filtering
>it out with several different low pass filters, including several fancy vst
>plugins like GRMBandPassVST. No effect! The filters all handle the
>supersonic tone just like the real 440 Hz tone. Or is cycle not really
>producing supersonics? Any help appreciated.
>Jeff Burns
  ----------------------------------------------------------------------
Stonewall Ballard                                       Stonetics, Inc.
Home: stoney@sb.org                              Work: sb@stonetics.com
http://stoney.sb.org/                         http://www.stonetics.com/

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Date:    Thu, 29 Apr 1999 16:47:37 -0400
From:    Christopher Murtagh 
Subject: Re: supersonics

On Thu, 29 Apr 1999, Jeffrey Burns wrote:
> The filters all handle the
> supersonic tone just like the real 440 Hz tone. Or is cycle not really
> producing supersonics? Any help appreciated.

 Hi Jeff,

 There is no way to transmit a 43kHz signal via any digital method with a
sampling rate of 44.1k or 48k. For cycle~ to be able to create a tone
above Nyquist (22k ish) it would have to include samples 'between the
samples' which I imagine just isn't possible (at least not the way that I
would imagine cycle~ was coded).

 The only way for this to work would be to crank out the data at a much
higher sampling rate thereby pitch-shifting everything up. This would
still not solve your problem if cycle~ thinks it is sending stuff out at
44.1k or 48k (not to mention that your buffer would run out pretty quick).
I imagine that to create supersonics, it would require cycle~ to be
re-coded and then fed out 96K D/A converters.

 So, David, any plans to go 96k? :)

Cheers,

Chris
-----------------------------------
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has been bundled with Windows98.

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End of MAX Digest - 28 Apr 1999 to 29 Apr 1999 (#1999-130)
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