*[https://www.serdashop.com/TNDLPT TNDLPT soundcard] aka PCjr or Tandy Sound - based on SN76489 (1979) - [[media:Texas_instruments_sn76489an.pdf|Datasheet]]
*[https://www.serdashop.com/CVX4 CVX4 soundcard] aka Covox Speech Thing - [https://scalibq.wordpress.com/2017/11/28/the-covox-years/ Technical analysis]
Fun fact: the OPL3 sound chip is capable of emulating the C64 SID. [https://youtu.be/iS_iC1mSmwg Source]
Note: Unlike the [[AMSDAP]] OPL4 & YRW801 ROM solution, the S2P soundcard natively supports Wavetable MIDI without requiring a software translation layer. The Willy with S2P soundcard recreates what it was like to connect an Amstrad CPC via a [[Music Machine]] MIDI port to a Roland MT-32 synthesizer in 1987.