Great video of Ricky Naranjo y los Gamblers haven't hear or seen any in a long time ...but still a kick ass conjunto. Watching fron Villapark Il.Hope to see more of your videos.in the near future.
I believe it's actually the 'attack' sound of the bass drum. Basically it's all you hear on music like metal where they play the bass drum so fast you can't have the rumble muddying up the sound. Here we have the attack along with the rumble since it's single strokes.