Saving output and .ly files automatically into different folders

[dirk van damme]

Hi,

Is it possible within lilypond that - when editing/typesetting - the 
output files (midi, pdf) are stored/Saved automatically into a 
different folder(s) then the .ly files. 
As editor i am using Frescobaldi.
i am searched throughout the lilypond documentation but 
I could not find any info whether to accomplish this by either 
1°) configuring lilypond or Frescobaldi or 
2°) by defining the folder structure within the .ly script itself 
(for example in the \score or \layout) 
i have probably looked into the wrong places.
I appreciate any help on this.
many thanks
Dirk Van Damme