SoundginZ (Quad) - Sound & Speech synthesizer IC for Arduino / Raspberry PI

Speakjet Phoneme Based Speech Synthesizer 18-pin IC

SoundginZ (Stereo) - Sound & Speech synthesizer IC for Arduino / Raspberry PI

Soundgin SSG01 Complex Sound & Speech synthesizer IC for Arduino / Raspberry PI

SoundginZ (Mono) - Sound synthesizer IC for Arduino / Raspberry PI

Incredible Musical Keyboard / Kawasaki Synthesizer for Commodore 64, Works

Vintage TI-99/4A Speech Synthesizer PHP1500 Texas Instruments 1979 Untested

Commodore 64 synthesizer & Sequencer, The Music Studio. Games +manuals. Untested