==Comparison of the SID and AY-3-8912==
AY sound chip has 3 tone channels, 1 noise channel and 1 hardware envelope.A mixer can be used to enable/disable tone output for each channel, The volume of each tone channel can be independantly controlled,OR be controlled by a hardware envelope.SID:
* 3 tone channels
* Ring-Modulation
* Filters
* Programmable hardware envelopes on any channel
AY:
* 3 tone channels,
* 1 noise channel
* 1 hardware envelope (with programmable waveform)
* the volume for each channel can be set or controlled by the hardware envelope.
* The mixer can be used to enable/disable tone output for each channel, enable noise or hardware envelope on a channel.
The SID sound chip is more powerful than the AY sound chip.
== Comparing Amstrad Plus and C64 ==