Is letting go limited to feeling of letting go?

[Danioover9000]

   I think that letting go is more than just the feeling of letting go. There are some cases I experienced this:

   During meditation I let go of a thought that engaged with my sight.

   During meditation there's sometimes an annoying song that plays and I attempted to let go of that.

   Question is: is letting go of a phenomenon limited to feeling of the letting go? If it isn't limited to feeling, then what unifies the letting go to the senses of the body and mind?