On the soundtrack, the piece is broken into two sections. One, called "Vale Decem" — which, in the episode, is the bit until the Tenth Doctor's last words, "I don't want to go" — and the other, "Vale", which is the primarily orchestral and non-verbal choral "response" played during the regeneration itself. The latter incorporates the melody of "The Doctor's Theme". However, the division is largely artificial, as the two share essentially the same melody. Indeed, the distinction was not made during the live Proms performance, where both parts were played under the title, "Vale Decem".