Hey, just filter out MIDI Clock messages and forward them as needed using the virtual pipelines. 
Check this out:
The pipelines above the red line is for forwarding the clock to all DIN-5 outputs. The filter keeps only messages related to transport and MIDI clock. The pipelines below the red line forward the tempo and MIDI note on / off to MIDI A, implementing the Arpeggiator.
Sync_And_Arp.mhp (251 Bytes)