Subject: MAX Digest - 8 Sep 1999 to 9 Sep 1999 (#1999-268)
Date: Fri, 10 Sep 1999 00:00:22 -0400
From:
Automatic digest processor <LISTSERV@LISTS.MCGILL.CA>
Reply-To: MAX - Interactive Music/Multimedia Standard Environments <MAX@LISTS.MCGILL.CA>
To: Recipients of MAX digests <MAX@LISTS.MCGILL.CA>


There are 5 messages totalling 291 lines in this issue.

Topics of the day:

  1. video and tv mirror
  2. hardware issues
  3. avg~ at > 10hz?
  4. pigmout
  5. Powerbook PCMCIA audio cards

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

Date:Wed, 8 Sep 1999 17:41:42 -0400
From:Neal Farwell <nfarwell@FAS.HARVARD.EDU>
Subject: Re: video and tv mirror

Hi Otto and others

I've used the composite video out on my 8600 (I think it's the same Apple
built-in h/w as the 8500?) both in PAL and NTSC. To answer some of your
comments:

- the picture quality is quite good; most notable failing is that it's
over-bright (I think incoming video signals on a TV or monitor usually go
through an automatic gain control, which uses the height of the sync pulses
to gauge the overall amplitude; my guess is the Mac circuit gets the sync
height and the black-white range in a slightly wrong ratio)

- there's a fair range of screen-size settings in the Monitors and Sound
CP; the hardware zoom (320x240 -> full screen) is great for Imagine etc

- adding the extra 2Mb video RAM probably is worth it; the TV can then be a
second monitor, with no menu bar etc; some of the above CP settings may not
be available without it; you have a video screen for video things and a
computer monitor for computer things; you don't have to unplug the comp.
monitor each time;

- fine horizontal lines always look jittery on interlaced TV; fine vertical
lines upset the color circuitry unless you use S-video; if you want to
display Max patches that's a problem - checking the "eliminate flicker" box
in Monitors & Sound helps...

- some 8500/8600 machines had an unreliable internal earth which made the
sound nasty and would do the same to video. Squeezing bits of the
case-joins (really!) should show that up...


To sum up, I'd say you shouldn't need a third-party video card unless
you're getting into serious video editing.


>Second, the resulting signal is rather poor, it comes out
>pale, the vertical borders are crooked and there is
>sometimes a noticable flicker around the edges.

As an aside, I had a problem like this trying to get a domestic VCR to play
to a TV; the VCR was producing "copy protect" signals that mess with the
sync, so that it only worked with the special "VCR Channel" on the TV.


Might be worth experimenting? The idea of the protection system is that a
second domestic VCR won't have the unscrambling circuit, so you cant copy
commercial videotapes. Not that the mac has this protection, but if its
sync is suspect...

And, stating the obvious, use a good quality 75ohm cable or S-video cable.


That's about 3 cents worth.

Neal

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

Date:Thu, 9 Sep 1999 17:09:17 +1000
From:"Sensor.E Overlobe" <overt@OVERLOBE.COM>
Subject: Re: hardware issues

>Has anyone had problems with losing control of the mouse and/or keyboard while
>using MAX/MSP? I have a G3 400MHz and find this happens on a regular (but not
>predictable) basis. Are there any strategies for avoiding or ameliorating this
>problem?

at the recent msp summer school in Ogaki David Z mentioned that the b/w
g3's will 'lock - out' the usb mouse and keyboard when you tax their
processors too much.. could be that you're trying to do too much at once
for that machine.?

maybe one way could be to keep an eye on the dsp state.. (can you tell what
percentage it's using) and 'shut down' non important encapsulated functions
when it reaches certain thresholds? there's an object~ for this, i'm sure.

'luck

jeremy

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

Date:Wed, 8 Sep 1999 17:51:19 -0700
From:Scott Draves <scott_draves@YAHOO.COM>
Subject: avg~ at > 10hz?

i noticed that the meter~ and avg~ objects don't
appear able to handle measurement intervals smaller
than 0.1s (10hz). i would like to measure something
like RMS power in the signal at higher frequency (eg
100hz). this would appear to be a buffering problem,
but i don't know what it is (i tried changing the
DSP status vector sizes without effect. these are
much too small to account for this effect anyway).
the output of this avg~ at 40hz looks like:

...
print: 0.000000
print: 0.018623
print: 0.000000
print: 0.000000
print: 0.000000
print: 0.027628
print: 0.000000
print: 0.000000
print: 0.000000
print: 0.013753
print: 0.000000
print: 0.000000
print: 0.021920
print: 0.000000


print: 0.000000
print: 0.000000
print: 0.022918
print: 0.000000
print: 0.000000
print: 0.000000
print: 0.010810
print: 0.000000
print: 0.000000
print: 0.018090
print: 0.000000
print: 0.000000
print: 0.019372
print: 0.000000
...

thanks for your attention. -spot

max v2;
#N vpatcher 319 104 870 700;
#P newex 134 40 59 196617 delay 1000;
#P newex 4 152 50 196617 metro 25;
#P newex 68 249 30 196617 avg~;
#P newex 122 141 27 196617 +~;
#P newex 77 199 27 196617 *~;
#P message 142 68 27 196617 stop;
#P newex 121 321 30 196617 print;
#P button 76 21 15 0;
#P message 96 77 31 196617 start;
#P newex 116 106 29 196617 adc~;
#P message 185 133 59 196617 interval 25;
#P user meter~ 146 196 226 209 25;
#P connect 4 0 10 0;
#P connect 6 0 10 0;
#P connect 7 0 9 0;
#P connect 10 0 9 0;
#P connect 8 0 7 0;
#P connect 8 0 7 1;
#P connect 4 0 3 0;
#P connect 3 0 2 0;
#P connect 6 0 2 0;
#P connect 9 0 5 0;
#P connect 2 0 8 0;
#P connect 4 0 11 0;
#P connect 2 1 8 1;
#P connect 11 0 6 0;
#P connect 8 0 0 0;
#P connect 1 0 0 0;
#P connect 4 0 1 0;
#P pop;

===
http://draves.org
__________________________________________________
Do You Yahoo!?
Bid and sell for free at http://auctions.yahoo.com

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

Date:Thu, 9 Sep 1999 13:03:30 +0000
From:andy g <host@PODCENTRE.DEMON.CO.UK>
Subject: pigmout

hello again list people.

i put in a post a couple of days ago about strange behaviour from 'pgmout'
- no response so far... i've been doing all sorts of trials with it, all to


no avail. the most confusing aspect of this is that maybe 2 times out of 10
it all works fine, but the rest of the time 'pgmout' is either doing
nothing or selecting programme numbers at random, even programmes outside
of its instructions. i.e. i want it to select 1,2,3 or 4 but it selects 43,
77, 101, whatever.

i've enclosed a stripped down version of the patch i'm running. if any kind
soul out there has the inclination to run it, i would be interested to see
if they get the samekind of behaviour.

i'm using a PB 1400c, yamaha A3000 sampler + translator pro interface if
thats of any interest.

another aside, i've also tried out a few older patches with loadbangs
triggering 'pgmout' that used to work fine. these are also now
malfunctioning. what could be going wrong in my system to make this
happen???


thanks in anticipation


andy

max v2;
#N vpatcher 50 40 701 322;
#P newex 456 179 41 196617 midiout;
#P newex 456 151 49 196617 midiflush;
#P button 435 126 15 0;
#P message 526 65 27 196617 stop;
#P message 489 65 31 196617 start;
#P message 456 65 28 196617 read;
#P newex 456 96 27 196617 seq;
#P message 375 147 14 196617 4;
#P newex 375 66 35 196617 r pfou;
#P newex 337 66 35 196617 r pthr;
#P newex 296 66 38 196617 r ptwo;
#P newex 258 66 35 196617 r pone;
#P message 337 146 14 196617 3;
#P message 296 146 14 196617 2;
#P message 258 146 14 196617 1;
#P number 317 198 35 9 0 0 0 3;
#P newex 317 222 55 196617 pgmout a 1;
#P number 75 59 35 9 0 0 0 3;
#P newex 183 228 35 196617 s pfou;
#P newex 147 228 35 196617 s pthr;
#P newex 108 228 38 196617 s ptwo;
#P newex 72 228 35 196617 s pone;
#P newex 137 193 63 196617 sel 240 259;
#P newex 108 161 63 196617 sel 260 279;
#P newex 89 126 63 196617 sel 280 299;
#P newex 72 91 63 196617 sel 315 300;
#P fasten 8 0 0 0 80 84 77 84;
#P fasten 3 0 7 0 142 217 188 217;
#P fasten 3 1 7 0 168 217 188 217;
#P fasten 2 2 3 0 165 186 142 186;
#P fasten 2 1 6 0 139 188 113 188 113 220 152 220;
#P fasten 2 0 6 0 113 220 152 220;
#P fasten 1 2 2 0 146 151 113 151;
#P fasten 1 0 5 0 94 223 113 223;
#P fasten 1 1 5 0 120 147 94 147 94 223 113 223;
#P fasten 0 1 4 0 103 112 77 112;
#P fasten 0 2 1 0 129 119 94 119;
#P connect 16 0 13 0;
#P connect 0 0 4 0;
#P connect 15 0 12 0;
#P connect 14 0 11 0;


#P connect 13 0 10 0;
#P connect 12 0 10 0;
#P connect 11 0 10 0;
#P connect 17 0 18 0;
#P connect 10 0 9 0;
#P connect 18 0 10 0;
#P connect 19 0 24 0;
#P connect 20 0 19 0;
#P fasten 21 0 19 0 494 86 461 86;
#P fasten 22 0 23 0 531 118 440 118;
#P fasten 22 0 19 0 531 86 461 86;
#P fasten 23 0 24 0 440 146 461 146;
#P connect 24 0 25 0;
#P pop;

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

Date:Thu, 9 Sep 1999 16:21:22 -0400
From:"M. Abidh Waugh" <abidh@MUSIC.UMASS.EDU>
Subject: Powerbook PCMCIA audio cards

Does anyone have any experience with the VXPocket PCMCIA audio card? Does it
work with MSP?
Are there other options besides this product for higher quality digital audio i/o
on a powerbook?

Thanks in advance.

  1. Abidh Waugh

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End of MAX Digest - 8 Sep 1999 to 9 Sep 1999 (#1999-268)
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