If your lowest frequency is 10 Hz, and your highest frequency is 100 kHz, and electrolytic will probably work fine. If you need to go up to a MHz or beyond, a polymer cap will work. For 10 Hz, you would be looking at something like 200 uF – 470 uF.
A 1 kohm resistor to ground after the cap will help discharge the cap AFTER powering on your device and BEFORE connecting the SA44B. A 50 ohm series resistor somewhere is desirable if you have a low impedance output.
Hopefully this helps.
