Editing Amstrad CPC (section)

===Audio===
The CPC uses the [[General Instrument AY-3-8910|General Instrument AY-3-8912]] [[sound chip]],<ref name="464 Tech spec"/> providing three channels, each configurable to generate square waves, white noise or both. A small array of hardware volume envelopes are available.

Output is provided in mono by a small (4&nbsp;cm) built-in loudspeaker with volume control, driven by an internal [[amplifier]]. [[Stereophonic sound|Stereo]] output is provided through a {{nowrap|3.5 mm}} [[headphones]] jack.

It is possible to play back [[sampling (signal processing)|digital sound samples]] at a resolution of approximately 5-bit by sending a stream of values to the sound chip. This technique is very processor-intensive and hard to combine with any other processing. Examples are the title screens or other non-playable scenes of games like ''[[Chase H.Q.]]'', ''[[Meltdown (8-bit video game)|Meltdown]]'', and ''[[RoboCop (1988 video game)|RoboCop]]''.  The later Plus models incorporated a DMA engine in order to offload this processing.