Luis_Br wrote:I think most players under use the thumb.
Sebastian wrote:For instance, Carcassi's treatise specifically state that ONLY the thumb finger must play the bass strings, and no other finger.
Sebastian, you have misread Carcassi (or maybe have a poor translation).
As early as page 10 of his method he gives specific examples of the fingers being used on the bass strings and the thumb as high as string two.
Jol wrote:Just curious about rh thumb. Is it advisable to use it on the bass strings wherever possible?
It is worthwhile developing the facility to play bass runs with - alternating fingers - alternating thumb and finger - thumb alone - according to the requirements of the music (and your judgement) e.g.
Jol wrote:... some of the harmony in Capricho Arabe where the harmony is on the 4 string?
The Carcassi instructions that I mentioned above refer to exactly this possibility i.e. thumb and fingers in combination.
As Luis said though - you can decide. If the result is musically sound then it's fine (though you might have other reasons for favouring a particular technique).