In kf5 version of audiocd kio I can't find appropriate settings for bitrate configuration when clicking Constant bitrate radio button on the MP3 Encoder tab. The previous version of audiocd kio switched the Variable Bitrate Settings group box to Constant Bitrate Settings and vice versa depending on the Encoding Method value.
Git commit 5b683ba3b2a80f315ffc129101a635784ef3aa2f by Yuri Chornoivan. Committed on 20/11/2018 at 18:28. Pushed by yurchor into branch 'Applications/18.12'. Fix switching between constant and variable bitrate for LAME configuration module M +2 -2 plugins/lame/encoderlameconfig.ui https://commits.kde.org/audiocd-kio/5b683ba3b2a80f315ffc129101a635784ef3aa2f