device has two inputs - left for the to-be-processed signal, right for a trigger signal (won’t be heard on output), to restart the lfos.
there is a trigger gain poti (8), and a trigger indicator beside it. tweak the gain poti until you see the trig indicator flash when receiving a trigger signal.
good trigger signals: anything with good punch, without attack, not too long (e.g. bd, sd, rim).