Or perhaps you can combine both worlds, which is what [oldmaninSC] did with his digital ... with each LCD via I2C, two TCA9548A I2C multiplexers are connected to an Arduino, along with an RTC ...

Capable of generating sine, triangle, and square waves up to 10MHz with its all-digital circuitry ... with the Arduino, rotary encoder, and 16×2 LCD providing an interface to control it ...