Pompe variations
From Guitare Jazz Manouche Wiki
Pompe must not be monotonous since it should be adapted to the solist. The accompanist, who carefully listens to the solist, will vary volumes and effects. For my part, I know of a few effects : the long tremolo (see roulés, tremolos section), some short and quich tremolos at the end of the beats, the shuffle which sounds like a train and the syncopation in triplets to give a break effect. Of course, one should not use effects too much, just use them when you feel the time is right.
The Shuffle
Shuffle with Explanation in French
Pompe with short tremolos
Two quick alternate strokes
Syncopated pompe in triplets