Sound to Light

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.