I've just been reading through Sagreras book 1 and I'm not sure how he expects us to play the G note that occurs every second beat in lesson 52. Is it to be played with the thumb or the i finger? It could be played either way. Just curious.
I agree with Konstantin. I believe that Sagregras' intention is for the middle dyads to be played with m & i.
A couple of things worth considering:
1. the previous 8 exercises all had the 2nd and third strings played with m and i and in his method, Sagreras generally only introduces one new concept for each excercise.
2. the purpose of Leccion 52 is to practice playing the bass note with the thumb whilst simultaneously playing an accented note on top string. This is only notated on each down beat. So it's reasonable to assume that Sagreras did not intend for the upbeat notes on the 3rd string to be played with the thumb.