OSCAR-27 Satellite return "on-air" !!!
AO-27 wasn't originally intended to be an FM satellite. It lacks the audio filtering normally seen with an FM receiver, since its uplink receiver was going to be used for data. You should be able to get better audio with wider filtering on your end.
With the lack of audio filtering on the uplink receiver, AO-27 was used for tests with D-Star radios.....
73 de IW2BSF - Rudy