Talko is an open source Arduino based LPC speech synthesizer. It’s firmware can be updated via the onboard USB port, using the standard Arduino IDE.
In Speech mode, the speech starts with a gate signal and complete before waiting for a new gate signal. The speech has the priority.
In Repeat mode, the speech starts and stops with the gate signal going high or low. The gate has the priority and the speech repeats while the gate is high. This mode is very useful to create crazy rhythms.
In VCO mode, the LPC engine loops while the gate is high, producing steady notes.
The VCO mode can also produce sounds using white noise instead of tones, making strange throat like sounds.
The sound synthesis can be is driven via CV signals or knobs to choose sounds and alter pitch, speed & bending.