 He had asked NBC to let him pre-record his 1944–45 series on transcription discs, but the network refused, so Crosby had withdrawn from live radio for a year.ABC agreed to let him use transcription discs for the 1946–47 season, but listeners complained about the sound quality.Crosby realised that Mullin's tape recorder technology would enable him to pre-record his radio show with high sound quality, and that these tapes could be replayed many times with no appreciable loss of quality.