Where Away?

Here is one quote I am trying to find. Maybe someone can help? It is from someone's default icon. Unfortunately she does not know from which book it is:

and the soared up and away, up, joining, separating, twisting, the one answering the other, rising into their native air

I vaguely remember it but really do not wish to wait for the new read to discover it again.

Anyone?

ETA: Thanks to heather_mist and feroxargentea here is the wonderfully complete excerpt:

'Where did you get this?' he asked.
'I picked it up in a pawnshop near the Sally-Port. It cost twelve and six.'
'You were not cheated, my dear. I like its tone extremely warm, mellow. You are a great judge of a fiddle, to be sure. Come, come, there is not a moment to lose; I make my rounds at seven bells. One, two, three,' he cried, tapping his foot, and the cabin was filled with the opening movement of Boccherini's Corelli sonata, a glorious texture of sound, the violin sending up brilliant jets through the 'cello's involutions, and they soared up and away from the grind of pumps, the tireless barking, the problems of command, up, the one answering the other, joining, separating, twining, rising into their native air.
(chapter 7)

They most delighted in the Halleluiah Chorus, and often, when Jack walked forward to lend his powerful bass, they would go through it twice, so that the deck vibrated again and he sang away in the midst of that great volume of true ordered sound, his heart lifted high.
But most of his musical pleasure was on a less heroic scale, and he took it much farther aft, in his great cabin with Stephen, the 'cello singing deep in its conversation with the violin, sometimes plain and direct, sometimes immensely intricate, but always profoundly satisfying in the Scarlatti, Hummel and Cherubini that they knew very well, more tentative and still exploratory as they felt their way far into the manuscript pieces that Jack had bought from London Bach's young man.
'I beg pardon,' said Stephen, as a lee-lurch made him slur his C sharp into a quarter-tone lower than a lugubrious B. They played on to the end of the coda, and after the moment's triumphant silence, the tension dying, he laid his bow on the table, his 'cello on a locker, and observed, 'I am afraid I played worse than usual, with the floor bounding about in this irregular, uneasy fashion. It is my belief we have turned round, and are now facing the billows.'
'Perhaps we have,' said Jack.

(chapter 5)

Since Jack and Stephen love making music together, I can never get enough of those scenes where they delight in tha activity. How I would love to hear Jack in the chorus. :D