Oh Boy, do I struggle with this one!
This exercise is not for the faint hearted.
The tremolo is a revered classical technique which thousands of hours of practice to master… not for us though.. we’re just going to use it as an exercises to get more dexterity and strength in our plucking fingers.
This will help you strengthen and develop your right hands pinky, as well as your coordination and ability to reverse roll. You can practice this on any chord, on any string, but I highly recommend learning at least a few bars of a musical example.
Some famous examples are…
1. Recuerdos de la Alhambra by Francisco Tárrega (The most Famous and one I tried back in the day)
2. Una limosnita por el amor de Dios by Agustin Barrios
3. Campanas del Alba by Eduardo Sainz de la Maza
examples are from classicalguitar.org a great resource for more information.