Trig conditions let each sequencer step fire only when a logical rule is true

Trig conditions (conditional locks) attach a logical rule to any trig via the COND parameter on Trig Page 1. If the condition evaluates true the trig plays; if false, it doesn’t. This is the core mechanism for making a single pattern evolve over time. Available conditions include: probability percentages (re-evaluated every cycle), PRE/NOT PRE (depends on the last evaluated condition on the same track), NEI/NOT NEI (depends on neighbor track), 1ST/NOT 1ST (first pattern loop only), LST/NOT LST (last loop before pattern change), A:B ratios (plays on the Ath out of every B cycles), and FILL (active only in Fill mode). A pattern can combine multiple condition types on different trigs to create complex, non-repeating variation. PRE chains are evaluated left-to-right and skip other PRE/NOT PRE trigs in the chain.

Examples

Set trig 3 to 50% probability. Set trig 5 to PRE — it plays only when trig 3 played. Set trig 7 to NOT PRE — it plays only when trig 3 didn’t play. Result: trigs 5 and 7 are mutually exclusive, toggling each loop.

Assessment

Explain what A:B = 2:4 means in plain English. Then describe how to set up a hi-hat that only plays the first time a pattern loops.