information recording apparatus includes a first recording mechanism for recording information at a certain location on a recording medium such as a tape , and a reproducing mechanism for reproducing the information recorded on the tape . a source of information different from the information recorded on the tape is coupled to mixing circuitry which mixed the information reproduced from the tape by the reproducing mechanism , and the newly generated information , and the combined information is re - recorded by a second recording mechanism at the certain location on the tape .