how do I remove a keyframe from audio track in media composer 5.5

[John Pale]

Engage audio keyframes in the smart tool.
Hover directly over the keyframe. Hit Delete key.

[Andrew Mckee]

Or to delete a range of keyframes set an in and outpoint around them and then do the same as above to one of them.

Andrew McKee
Editor/Colourist
Avid Certified Instructor – MC5.5
Apple Certified Trainer – FCP7
Pixelwizard.net

[Grinner Hester]

select it and push delete.