The only requirements are you did the steps in previous blog post Installing Dependencies. This page completes Other dependencies and is according to linuxfromscratch.org
XML library supporting XPath.
./configure --prefix=/usr --disable-static --with-history &&
make
make install
Free sound file format library.
./configure --prefix=/usr --disable-static &&
make
make install
Cross-platform audio output library.
./configure --prefix=/usr &&
make
make install &&
install -v -m644 README /usr/share/doc/libao-1.2.0
Library supporting Soundfont2 and other instrument's container formats.
./configure --prefix=/usr &&
make
make install
Advanced Linux Sound Architecture output library.
./configure &&
make
make install
Universal Unique Identifier library.
./configure &&
make
make install