Re: clef transposition: tenor -> bass

[Roman]

Paul Scott schrieb:

> staffTrombone = {
>   \key c \major
>   \clef bass        % formerly \clef tenor
>   \relative c {
>       \time 3/4
>       c c c
>       ...
>   } }
>
>
> That's all there is to it.  Those C's will appear on the second space of 
> the bass clef instead of just below the tenor staff.  You have already 
> specified three C's one octave below middle C.  Lilypond will put in the 
> right place for whatever clef you choose.

Okay, but my problem is, that a C in tenor clef isn't a C in bass clef 
and I don't know how a transposition between them needs to be!?

I know the \transpose-Command of Lilypond but how do I apply it to 
transpositions between tenor and bass clef? Both clefs are located on 
the 4th line. In bass clef this is the "f"-line, but what's it in tenor 
clef?

How do I have to apply the transpose-command in my example?

  \transpose tenor_keynote f \staffTrombone

or what isn't this correct? And how will the clef itself be replaced in 
this scenario, if \staffTrombone has \clef tenor as shown above??