The first thing she's going to hear is gentle guitar music, its own song but still working with her own. Not long after is she going to come up onto Gobo, who'd chosen a spot near her part of the tunnel to wait, and had been singing to pass the time.

♫ While the sun goes 'round, I'll still be found
Following the sound
Something's calling me
When the world goes drifting back to bed
Memories in my head
Wonders follow me

Every morning
Every day
Every evening
Calling me away... ♪