There are many types.
Some have EEPROM so they can remember where they were last set to. (never used because I have micros with eeprom)
There are many different interfaces. I2C, SPI, etc
10k, 20k, 50k, 100k ohm.
Many are linear some are log.
Some are built for audio and are there for very different.
It is possible to get noise into the system form the micro. I have not had problems on video but audio can be a problem.
What out for where the power up default setting.
I would to to digikey.com and search for digital pot.