Is it an endless knob, you trying to map? What is the console output if you start Mixxx with mixxx --controllerDebug and turning the knob in both directions?
The mapping would look like that using a RMX2 effect knob:
<control> <group>[Playlist]</group> <key>SelectPrevTrack</key> <status>0xB0</status> <midino>0x54</midino> </control> <control> <group>[Playlist]</group> <key>SelectNextTrack</key> <status>0xB0</status> <midino>0x55</midino> </control>
Is it an endless knob, you trying to map?
What is the console output if you start Mixxx with
mixxx --controllerDebug
and turning the knob in both directions?
The mapping would look like that using a RMX2 effect knob:
<control> [Playlist] </group>
<key>SelectPre vTrack< /key>
<status> 0xB0</status>
<midino> 0x54</midino> [Playlist] </group>
<key>SelectNex tTrack< /key>
<status> 0xB0</status>
<midino> 0x55</midino>
<group>
</control>
<control>
<group>
</control>