Using only one channel of a PAM8403 module

[Pimpom]

I'm going to use one-half of a PAM8403 module as a part of a larger system. Its job is to produce short bursts of a fixed tone. I have two questions about this:

1) Is it OK to leave the unused output pins open?
2) Is it best to short the unused input pin to ground?

 

[jlinkels]

Yes and yes

 

[Pimpom]

Thanks. I've been designing electronic circuits for over 50 years but have been away from audio for a long time. Besides, I've had only a limited experience with Class D amps and this will be the first time I use an off-the-shelf module of any kind in my designs.