Re: [LAU] Re: [linux-audio-user] Create high-pitch noises like the mosquito device

If you've got some more time to exercise, it's easy to do a hardware implementation - it's called "astable multivibrator" take a battery, two Transistors a Cap and few Resistors,... - eg. http://en.wikipedia.org/wiki/Multivibrator - for a more professional approach, follow the NE555 IC idea. radio-shack sells those.. If you want to get into making annoying noises: try to modulate some high-freq. osc. - there are various tools to generate/synth sounds on linux.. http://apps.linuxaudio.org/apps/categories/software_sound_synthesis_and_mus… depending on your flavor try spiralsynthmodular, pure-data, supercollider, or a dog-whistle + old hair-dryer approach ;) - There is also the possibility of creating sick-feelings with some <16Hz sounds - they don't exactly qualify the subject, but are IMHO more interesting.