Question / Help Is there a way to use VBR for audio encoding specifically, with AAC?

[MightyBirdy]

Looking at logs, it shows:

17:35:08.961: [CoreAudio AAC: 'Track1']: settings:
17:35:08.961:     mode:          AAC
17:35:08.961:     bitrate:       192
17:35:08.961:     sample rate:   44100
17:35:08.961:     cbr:           on
17:35:08.961:     output buffer: 1536

Is there a way to turn CBR off?