The PPG Wave 2.2 was a big step forward in wavetable technology and was released in 1982 - just one year after the PPG Wave 2 was released. Approx. 300 PPG Wave 2.2's was made during its life span.
Is was still an eight voice wavetable synthesizer, but now offered 2 oscillators per voice, SSM2044 analog filters,
and two modulation wheels.
32 wavetables with 64 waves in each wavetable can give you a LOT of value for your money here.
You could use the PPG Waveterm A computer to load samples into its 8 bit sample RAM and this was the first PPG synthesizer that could be hooked up to the PPG Waveterm computer.