My guess: Audacity to edit the sound (Eg: Cut from a EWL / NSL
announcement and paste the edited sound / record it by asking his
friends / himself.)
I didn't use audacity. I used audioblast. And oh yeah, I have
partnered with a friend to create routes for harbourvale city. As
of now, I'll be starting works on harbourvale airport express line,
which will interchange harbourvale line at stadium (previously
boulevard) and the train stock for the whole line will be c751b
(object train and default train). My friend will try to create
evergreen fields line, north west line and evergreen fields lrt
line. He "operates" HLRT (harbourvale light rail transport) and
will "operate" the above lines. I'll attempt to create harbourvale
line (in which I have already released), blackton line and hael. I
"operate" hcrt (harbourvale city rapid transit) and will "operate"
the above lines. And together we make up the mrt/lrt system of
harbourvale, just like smrt and sbs transit making up the mrt/lrt
system of singapore.