damper pedal

There was, I admit, great clearness—a clearness that became a smudge when you used the damper pedal.

For the brilliant effect demanded, there should be a liberal use of the damper pedal.

In many modern editions this depression and release of the damper pedal are more accurately indicated by the sign .

May the damper pedal and the soft pedal be used simultaneously, or would this be detrimental to the piano?