According to the numbers and the recording notes in Volume 6 of the Naxos label's recordings of Weiss' Lute sonatas, the sonatas contained therein (#7 in C minor, #45 in A major and #23 in B flat major) were written throughout Weiss' compositional life. According to the notes, Weiss' compositional maturity was truly reached in, of course, #45. Not being a musical scholar, I really can not rate these works as to there compositional maturity or immaturity. I only know that to me ALL three works are beautiful as played by Robert Barto. He plays all three works with such gorgeous tone that listening to this recording brought much solace to my life!
If you enjoy the sound of the lute, you really can't get much better than this album. It is indeed filled with beautiful music that is played exquisitely. The sound of the recording is great too--thank you Naxos.