These drone pieces (see also track 14 in Part 2) are the first results of a little experiment in permacomputing-inspired software synthesis. I have written short (~100 LOC) programs in C which rely only on the standard library and simply write raw audio data to stdout. To listen, you can pipe them to tools like aplay or pacat on Linux or aucat on BSD, or you can redirect them to a file to save the output. The audio samples are generated on the fly using small lookup tables of sine values, so very little memory is used and these programs should run fine on quite old machines. The drones themselves are basically just a small number of sine waves, with their pitch or amplitude modulated by slow sinusoidal LFOs, so they variously harmonise with or beat against one another. I chose LFO frequencies which are relatively prime to one another so it takes a long time for the combination to loop - they do loop, but personally I can listen for an hour without getting bored, easily.