Im building a scanner, may need help

[TTerbo]

im not getting the scanners with the DMX soundboard, im building a soundcard DAC

[mixedgas]

lissajous.exe attached in zip. Its XP era, so you may need to enable permissions/legacy with Vista, etc

Start with 200 hz in oscillator one, 300 hz in oscillator two, all four amplitude sliders full right, and sin-cos mode. remember to hit the three start buttons.

keep in mind the program was designed for 800 x 600 or so screens, not the modern wide ones.

You may need to drag a oscillator some times to get it to start.

Steve

[mixedgas]

[QUOTE=goninanbl00d;174073]So lissajous.exe will work without a correctional amp? In that case it's probably more useful than the DMX board anyway.

Well, there will be loss below say 20 Hz, but it goes equal amounts below and above ground, so that should stay balanced without much jummping around unless he sets it for very low signals. I'm sure there are sound cards that go down to 5 hz, I have one tha goes to DC natively.

Steve

[mixedgas]

Attached is a sample LSA file for lissajous.exe, For those who need to learn that ratios, and phase, more then raw frequency, influences abstracts.

SimpleGifts.ZIP

[TTerbo]

hey mixedgas, i downloaded the zip file but i cant open or view it.
did i need to download the lasershow software first?

[mixedgas]

You should have two zips to download, in two different posts.
One has a .exe and one has a .lsa, they are about 3 posts apart

pm me with a email if you do not get it.

Steve

[TTerbo]

ah cool i got it,
i can make little spheres and stary type things by messing with the frequency, where can i get more of the things you "load" in to it like "simplegifts"

[mixedgas]

ah cool i got it,
i can make little spheres and stary type things by messing with the frequency, where can i get more of the things you "load" in to it like "simplegifts"

You have to make them.

Steve

[TTerbo]

is that done by messing with the frequencies to make the different patters?

[mixedgas]

yes, very frequency, amplitude and phase.

Phase in your case is limited to Sine:Cosine or Sine:Sine. Sin:cos makes "outties" then Sin:Sin makes "innies"
Which refers to which way the loops point, not to belly buttons.

Start with ratios of the frequencies, for example. 3:2 is a five pointed star.

So lets say I start with 30 hz, 3* 30 = 90 hz, 2 * 30 = 60 hz

You need to have at least one oscillator above 20 Hz so images do not flicker, and so the signal makes it through the sound card when it is not modified.

Dial in 90 and 60 for the two oscillators and adjust the amplitudes till you get some thing you like:

Try various ratios, 1:2 , 3:2 , 3:1, 4:1 ; 4:3 ; 4:5 7:5 etc

Then try splits, say 3:2.5

Each oscillator plots a circle then the circles are mixed to get the patterns. If you want to add motion, ie a spin, offset one of the oscillators 1 or 2 hz,

ie a spinning star is 60 Hz, 91 Hz instead of just 60:90

Watch here, see the Java animations, to get a idea of what is going on:

http://en.wikipedia.org/wiki/Epicycloid
http://en.wikipedia.org/wiki/Hypocycloid
http://en.wikipedia.org/wiki/Hypotrochoid
http://en.wikipedia.org/wiki/Spirograph


Steve