Trilby hat SDR. Raspberry pi hat http://www.kinetic.co.uk/Trilby.php Also contains
apt-get install libasound2-dev
wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.50.tar.gz
make nospi
sudo apt-get install libfftw3-dev
mkdir build
cd build
cmake ..
make
./ttunevg -t -s
Keypress should be done in terminal window, not openvg window
Squelch is on register 0xf5 Mute is on register 0xf6