[Brad Olander]

Along with the User and Main menus, the HPX2700 has an Option Menu. (“Displayed when the MENU button is pressed while pressing the LIGHT button.”)

In the Option menu, try setting the “RATE SET AT REC” to On. This should allow you to change speeds while recording. According to the manual, “When set to ‘ON’, audio will not be recorded to the P2 card during VFR operation in Native recording mode, whatever the frame rate setting.”

Quotes are from the menu section of the user manual.

Good luck.

Brad Olander
https://www.olandercamera.com