Cork underlayment over wood flooring

I would like to install floating hardwood (bamboo) on the wooden floor of the second floor of my two-story house in California. For the maximum sound isolation I purchased QEP 1/4 in. cork underlayment. The roll came without instruction from the manufacturer, and I was wondering if anyone could guide me through the installation process.

1. Should I leave any gaps between underlayment edges and walls?
2. Once I unroll the roll and cut a piece of the need length, should I flip it over so the curled edges would face the floor to minimize curling?
3. Should I seal the runs with tape? I found instructions from another manufacturer of rolled cork underlayment, and they say not to seal the runs with tape for wood subfloors because ventilation is needed.

 

Took 5 seconds to locate the manufactures installation instructions!

https://images.homedepot-static.com/...ff60368bcc.pdf

 

Thanks. It says to tape the seals to wall joints with duct tape. How do you do it? At 90 degree so that a part of the tape gets on the wall itself and later be hidden under the base boards?