Subject: MAX Digest - 31 Oct 1998 to 1 Nov 1998 (#1998-56)
Date: Mon, 2 Nov 1998 00:00:00 -0500
From: Automatic digest processor 
Reply-To: MAX - Interactive Music/Multimedia Standard Environments
     
To: Recipients of MAX digests 

There are 4 messages totalling 171 lines in this issue.

Topics of the day:

  1. long term stability
  2. max in the desert
  3. Want advice for outdoor installation
  4. Outdoor installation

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Date:    Sun, 1 Nov 1998 01:06:51 -0500
From:    Johnny DeKam 
Subject: long term stability

>>Does anyone here have experiences with Max installations with
>>these demands on reliability? ...

Eventually, MAX's internal clock needs to be reset...
In long term installations I've run, MAX has crashed after only a week.
but this may depend on which objects you use -- (others might know which
ones exactly)

To alleviate this you could program a reboot cycle, this is built into the
MacOS.
So that once a week the machine automatically restarts.

Also, in terms of power outages, there are UPC Backup power supplies which
include an
RS-422 port (serial) so called "smart" Power backups.  When there is a loss
of power, the battery kicks in, and politely instructs the computer to
shutdown.  When power is restored the computer will then boot up as normal.

As for solid state drives - never actually seen one for the Mac, but who
knows.
Another strategy might be to schedule a periodic replacement of the computer
and/or hard drive.

Johnny DeKam
....................................................................
                                                    http://node.net/

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Date:    Sun, 1 Nov 1998 12:31:10 +0100
From:    Robert Henke 
Subject: max in the desert

Hi eric,
you may ask people who build stuff for military purposes...
a more serious aeswer : have you ever thought of using simple hardware
(no cpu/harddisk/display) like logical gates / flipflops / timers to
realize your project ?
if you do so you indeed can use millitary versions of integrated circuits
which will definitly operate under your circumstances. if you realize it
all with low impedance TTL circuits you will also not have trouble with
humidity.
you just hve to find a guy who makes this hardware for you. for the
simulation and develoopment of this hardware you can use max.

rob.

> Asking for a bit of advice:
>
> I am about to make sound and/or music for a permanent outdoor =
installation
> here in Oslo, Norway. We are a little in doubt what equipment to use for
> the project. Different sounds should be generated by movements of the
> installation. I'd say this is a typical "Max and a sampler" project, but
> for the reliability. This installation will be left unattended for 24 =
hours
> a day, 365 days a year, hopefully for many years. Temperatures will vary
> between minus 30 and plus 40 degrees centigrade, and it has to auto-boot
> after power failures. To get this reliability, we are advised to use a =
PLC

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Date:    Sun, 1 Nov 1998 09:25:19 -0700
From:    Richard Zvonar 
Subject: Re: Want advice for outdoor installation

At 10:43 AM -0700 10/31/98, Eirik Lie wrote:

>I am about to make sound and/or music for a permanent outdoor installation
>here in Oslo, Norway...This installation will be left unattended for 24
hours
>a day, 365 days a year, hopefully for many years. Temperatures will vary
>between minus 30 and plus 40 degrees centigrade, and it has to auto-boot
>after power failures.

You might have a look at the SuperNova system from Level Control Systems.
The LD-88 mixer provides full dynamic 8 X 8 matrix mixing of external
signals (expandable up to 128 X 128), with built-in automation control. The
LD-16S Wild Tracks card provides 16 channels of asynchronous playback from
a SCSI hard drive. These channels are available in addition to the external
input channels, so a single LD-88 can mix 24 source channels. The system
can be set to auto-boot and to execute its internal programming on
power-up.

The hard drive playback system supports redundant hard drives, so that if
the primary drive fails the secondary drive will start playing "on the
beat" within one second. The automation system is Cue and Cue List based.
This allows the system to automatically run through its program without
outside control, but it also allows recall of individual cues or direct
adjustment of any parameter via MIDI or RS422/RS232 serial commands from an
external source. It also supports MIDI Time Code.

More information can be found at 

______________________________________________________________________________
Richard Zvonar, PhD                              zvonar@LCSaudio.com
(818) 788-2202 voice                             zvonar@well.com
(818) 788-2203 fax                               zvonar@alum.mit.edu

                          http://www.well.com/~zvonar

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Date:    Sun, 1 Nov 1998 22:10:05 +0000
From:    Jakob Brandt-Pedersen 
Subject: Re: Outdoor installation

Eirik Lie wrote:
> I am about to make sound and/or music for a permanent outdoor installation
> here in Oslo, Norway. We are a little in doubt what equipment to use for
> the project. Different sounds should be generated by movements of the
> installation. I'd say this is a typical "Max and a sampler" project, but
> for the reliability. This installation will be left unattended for 24
hours
> a day, 365 days a year, hopefully for many years. Temperatures will vary
> between minus 30 and plus 40 degrees centigrade, and it has to auto-boot
> after power failures.
> However, I would rather like to use a Mac running Max and/or a sampler for
> this project. Does anyone here have experiences with Max installations
with
> these demands on reliability?

5 years ago I made an interactive sound- and light-installation, called
The Musical Floor.

Although it was not outdoors, but in a church. I still think the setup
was nice:
I used a Mac with a SampleCell-card, runned by MaxPlay. By putting the
SampleCell-bank-document and the Max-program in the startup-folder it
was possible to load all sounds into the card and start the Max-program
automatically.

The Installation worked without problems in the 3 months the exibit
lasted. Every morning it was started when the personel turned on power
in the church, and every night it was shut down, so actually this would
be the same to power failures.

The good thing about this setup is that it is so simple. One little box
doing it all. No cables or midi-interfaces etc.

I have only worked with temperatures from +5 to 35 degrees celsius, but
this has not been problematic. Perhaps it is possible and even cheeper
to somehow insolate the system?

Cheers
Jakob Brandt-Pedersen
Multimedia-artist

--------
jbrandtp@get2net.dk
http://hjem.get2net.dk/jbrandtp/
--------

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End of MAX Digest - 31 Oct 1998 to 1 Nov 1998 (#1998-56)
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