The DT

[oygirl]

Will Roland ever get to the top of the DT for ever?

[vivazebool]

I'm assuming you've finished DT7.

I won't give you the answer, but I'll point you in the right direction...

Here's some hints:
Read the poem by Robert Browning at the end of DT7, especially the last stanza.
Re-read the first couple of pages of The Gunslinger, pay attention to what it says about what Roland is wearing and not wearing.
Re-read the end of DT7.
In these parts, King has given us hints to the answer.

[Bluey Lunger]

the song never stops, just the singer.