The Coleco Talking Teacher was made in 1985. It is similar to the Speak & Spell.

When a key is held down it will continuously replay the sound. I wired two rotary switches to the keyboard matrix to select and activate each key function in order to create looping sounds. Most bends work when a key is pressed so this creates nice glitchy loops.

Keyboard matrix diagram
Pitch and Tone

Audio clip: Adobe Flash Player (version 9 or above) is required to play this audio clip. Download the latest version here. You also need to have JavaScript enabled in your browser.