Can I still use GiO’s footswitches while using another Apogee interface (such as Apogee’s ONE) for audio input and output?

Yes you can use another audio interface for sound input and output, while using GiO for just the footswitches.

Simply connect both devices and choose ONE as your audio input/output device. GiO’s footswitch functions will automatically be recognized, regardless of the audio input/output setting.