The PPG Waveterm A - or just PPG Waveterm - was PPG's first entry into a full studio solution.
The PPG Waveterm A does NOT produce any sound itself meaning you will need a PPG Component like the PPG Wave 2.2, PPG Wave 2.3 or PPG EVU if you want to hear anything you do on it.
The PPG Waveterm made PPG owners able to produce their own wavetables and to save their own programs to floppy disk instead of tape using the Cassette interface.
It also made PPG owners able to create songs and to - most importantly to most - sample something and play it back using the PPG Wave 2.2.
The PPG Waveterm is based on an old german computer called Eltec Eurocom II based on the Motorola 6809 processor, and can be set up to run the 'ordinary' Eurocom II software (Flex 9).
You can also hook up a keyboard and a printer to it to have a 'fully featured' home computer - a very expensive one though.
The PPG Waveterm was not cheap - but it was a giant leap in music technology, and the quality of the samples you could produce using the PPG Waveterm was astonishing back then in all its 8 bit glory.