Convert OGG to MP3
Drop an .ogg file and download an MP3 at 192 kbps. Sample rate and channel count carry through unchanged.
Ogg files turn up from game assets, Linux tooling, Wikimedia downloads, and voice recorders. All of them run into the same wall eventually: consumer playback hardware that only speaks MP3.
Bitrate is not comparable across codecs
A 96 kbps Opus file can sound close to a 128 kbps MP3, so matching numbers between formats is misleading. Encoding at 192 kbps gives MP3 enough headroom to carry the Ogg source without adding much of its own damage.
Raising it to 320 kbps mostly grows the file. The ceiling is set by the Ogg you started with.
Low-bitrate sources
If the .ogg was encoded at 48 kbps for voice, the MP3 inherits that quality no matter what bitrate you choose. Encoding a thin source at 320 kbps produces a large file that sounds exactly as thin.