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====Exile: sampled speech==== ''[[Exile (1988 video game)|Exile]]'' turns the Electron's one channel output into a digital speaker for [[pulse-code modulation|PCM]] output. The speaker can be programmatically switched on or off at any time but is permanently attached to a hardware counter so is normally only able to output a [[Square wave (waveform)|square wave]]. But if set to a frequency outside the human audible range then the ear can't perceive the square wave, only the difference between the speaker being switched on and off. This gives the effect of a simple toggle speaker similar to that seen in the 48 KB Sinclair [[ZX Spectrum]]. ''Exile'' uses this to output 1-bit audio samples.
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