I cannot reproduce this one, but last evening while reading, I pressed the one key to go back a sentence and the BP hesitated, then changed it's pitch and volume, and then continued to read. I stopped the reading and tried other functions. Although many would work, never could I get the beep to invoke the second function of a key. The unit did, however, perform the alternate function if I held the key for the correct period of time. Although volume and pitch were changed, the voice remained Precise Pete. A reset using 2 B resolved the problem of the beep not sounding.