Audio function generator composed of ICL8038

The audio function generator composed of ICL8038 is shown in the figure.
    The integrated circuit uses ICL8038.
    Resistor Ri and potentiometer RP1 are used to determine
the DC potential of pin ⑧, usually ≥2Vcc/3. The lower the µ,
the lower the output frequency and vice versa. Therefore, ICL8038 is also
called a voltage controlled oscillator (vc0) or frequency modulator (FM).
The adjustable frequency range of RP1 is 20Hz~ZOkHz. When using
dual power supplies. The DC level of the output waveform is zero. When using
a single power supply, the DC level of the output waveform is
Vu:/2. The audio function generator composed of
    ICL8038 can generate square waves, triangle waves and sine waves, and its corresponding output terminal is shown in Figure 21-35 .