Saw VCO with lin-FM option

F1 x F2 do in analog computing to get a perfect tracking FM-VCO

Good FM and metallic sounds

lin-FM manually and CV- controllable!

Sine, Triangle, Square and Saw output

Sound sample:

Metallic sound. Carrier (TZ-VCO) and Modulator (XR-VCO) are tuned and tracking parallel. Modulator is slightly changing manually and periodically by a LFO. At the ende modulator is fading out:

Two TZ-VCO interaction: