Applies to: A-Station
Check the midi clock source (4th page of the global menu). If this is set to "e" for external, ensure that the A-Station is receiving midi clock. Also check that the arp condition is not off (first page of the arpeggio menu). See pages 36 and 51 in the user manual for full descriptions of these parameters (37 & 52 in the A-Station V1.1 manual).