SOUND TO LIGHT

by Graham Mason



The theory of converting sound to light is a dubious one. Turning a

sensation caused in the ear by the vibration of the surrounding air

into a natural agent that stimulates the sense of sight, is certainly

a concept difficult to conceive. Well, it is for me anyway. But, there

again, "difficult" is only a word and the Speccy is a machine that

doesn't want to know its own limitations; and so, using Graham Mason's

program, the dubious can become certain and you can have sound to

light.



What the hell am I waffling about? Just type in this routine and

you'll see what I mean.



Method

Simply use the Hex Loader to type in the block of hex and then save it

with SAVE "s-to-l" CODE 64400,200 [Except that the code is 1016 bytes

long. JimG]. And remember, before you load it always use CLEAR 643999

[Sigh. JimG] first. RANDOMIZE USR 64400 will execute it.



BZZZZZZZZZTTTT!!

The best results come if you use a Speccy 128 (+2 or +3) when you can

hear the sound through the TV. Otherwise, if you use the 48K, then

disconnect the Mic plug and pull the Ear play out of the tape recorder

slightly so you can hear the music. Play the music tape and watch the

result.



WARNING! Do not attempt to use this program if you suffer from

epilepsy or any other related disease.



You can also change the effect the routine produces by POKEing random

numbers into FBA6 to FBAF [That's 64422 to 64431. JimG]. This affects

the way the screen reacts, the fade-out delay, symmetry and speed. Try

combinations like 1,2,1,254 and 3,2,3,254 for screen rotation and so

on. Experiment to find the effect you want.