Me reading "one five seven lounge" in various styles. Fulfilling request: http://www. Freesound. Org/forum/viewtopic. Php?t=13569&sid=3768de9e712aaf5d4bbb37a510ff6b7a.
The rather elusive razor waveform, as it is commonly called due to its peculiar shape, from the commodore 64's sid chip, acheivable only by activating the outputs of any two waveforms on the oscillator section.