Hi, I've just downgraded from UbuntuStudioGutsy64 and I'm attempting to get Chuck running but I can't seem to understand this error that I'm getting.  I have downloaded rtaudio4.0.3 and it looks like it compiled fine.

make linux-jack
make -f makefile.jack
make[1]: Entering directory `/home/stochastic/Desktop/ChucK/chuck-1.2.1.1/src'
g++ -D__LINUX_JACK__ -c -O3 -D__CK_SNDFILE_NATIVE__ rtaudio.cpp
rtaudio.cpp:2715:23: error: jack/jack.h: No such file or directory
rtaudio.cpp:2721: error: ISO C++ forbids declaration of 'jack_client_t' with no type
rtaudio.cpp:2721: error: expected ';' before '*' token
rtaudio.cpp:2722: error: ISO C++ forbids declaration of 'jack_port_t' with no type
rtaudio.cpp.......

what obvious part am I missing?
It would really be nice if some proper Linux documentation could be written into the upcoming versions of the install tutorial.  I'd be happy to help write it once I understand it.

Thanks.
-Eric