[Freeswitch-users] dp tools record to 1 channel but uuid_record record to 2 channels which cannot been playback

# play test.wav Input File : 'test.wav' Sample Size : 16-bit (2 bytes) Sample Encoding: signed (2's complement) Channels : 2 Sample Rate : 16000 1) is it the default behavior that uuid_record record with 2 channels 2) is it reasonable that FS can record to 2 channels but cannot playback? 3) do I need to set RECORD_STEREO=false before uuid_record? Thanks for help.