SOUNDING OUT

[file: Sensor]



Robert Glavas of Bury supplies our first program, a routine to detect

sound entering the cassette port. This could form the basis of many

programs. He supplies us with a demo showing how it could create graphs.



A couple of points. First, some older computers need to be allowed to

warm up for about five or ten minutes before the signal settles to a

standard, and secondly you have to provide the sound!



This can be done in several ways, either connect a microphone to the

ear socket, but this may not be very successful, or record a word or

message and play it back into the Spectrum by the usual lead, or put

your recorder into "play" and speak into the built in mic.



Testing 1, 2, 3, 4. Testing 1, 2, 3 ...