This circuit uses the well-known 8038 to generate 3 waveform signals. Frequency bands are selected by S1. The circuit generates signals from 30 Hz to 30 kHz in 3 bands.

This circuit uses the well-known 8038 to generate 3 waveform signals. Frequency bands are selected by S1. The circuit generates signals from 30 Hz to 30 kHz in 3 bands.