Canon EOS RP Mirrorless Camera - Manual (Page 545)

545
Custom Function Settings
C.Fn III-9: Audio compression
Sets audio compression for movie recording. [1: Disable] allows higher
audio quality than when audio is compressed, but file sizes are larger.
z
0: Enable
z
1: Disable
o Editing movie files recorded with [1: Disable] and then saving them with
compression will also compress the audio.
o Audio is compressed even if [1: Disable] is selected when [Movie rec. size]
is set to
L6V
(NTSC) or
L5V
(PAL).
o Audio for video snapshots is compressed even when [1: Disable] is selected.