Raspberry Pi Radio Config Notes =============================== !!!!!! These notes assumes your Raspberry Pi resides on a secure, trusted network (e.g. behind a firewall in your own home). No consideration has been given to security. !!!!!! Run `raspi-config` to turn on ssh, set boot to console, and expand filesystem sudo apt-get update sudo apt-get dist-upgrade sudo apt-get install nginx fcgiwrap spawn-fcgi vim pulseaudio mplayer tmux Edit /etc/network/interfaces to set static IP: auto eth0 iface eth0 inet static address netmask gateway Add the www-data user to the audio, pulse groups. Edit /etc/group: audio:x:29:pi,pulse,www-data pulse:x:110:pi,www-data pulse-access:x:111:pi,www-data Edit /etc/pulse/daemon.conf daemonize = yes system-instance = yes exit-idle-time = -1 Edit /etc/default/pulseaudio PULSEAUDIO_SYSTEM_START=1 Find the name of your prefered audio output with `pacmd list-sinks`. Edit /etc/pulse/client.conf default-sink = alsa_output.usb-C-Media_INC._USB_Sound_Device-00-MicroII.analog-stereo /usr/bin/amixer set Master 26% cat /dev/urandom | pacat ^C tmux new-session -s michiganradio -d 'pulseaudio -D ; mplayer http://ummedia12.miserver.it.umich.edu:8004/miradio' Web Server Setup ---------------- sudo mkdir /var/www sudo mkdir /var/www/cgi-bin sudo chown -R www-data:www-data /var/www/ sudo cp /etc/nginx/sites-available/default /etc/nginx/sites-available/dist-default Edit /etc/nginx/sites-enabled/default: server { root /var/www/; index index.html; server_name localhost; location / { try_files $uri/ /index.html; } location /cgi-bin { include fastcgi_params; fastcgi_pass unix:/var/run/fcgiwrap.socket; } } Restart nginx: `sudo service nginx restart`. Minimal Web Radio Control ------------------------- Create `/var/www/index.html`: Raspberry Pi

Raspberry Pi

Create `/var/www/cgi-bin/play-michiganradio.cgi`: #!/bin/dash /bin/echo -e "Content-type: text/html\r\n\r\n" /usr/bin/tmux new-session -s michiganradio -d 'mplayer -cache 1024 http://ummedia12.miserver.it.umich.edu:8004/miradio' Create `/var/www/cgi-bin/stop-michiganradio.cgi`: #!/bin/dash /bin/echo -e "Content-type: text/html\r\n\r\n" /usr/bin/tmux kill-session -t michiganradio Create `/var/www/cgi-bin/increase-volume.cgi`: #!/bin/dash /bin/echo -e "Content-type: text/html\r\n\r\n" /usr/bin/amixer set Master 1%+ Create `/var/www/cgi-bin/decrease-volume.cgi`: #!/bin/dash /bin/echo -e "Content-type: text/html\r\n\r\n" /usr/bin/amixer set Master 1%- Finally: cd /var/www/cgi-bin sudo chown www-data:www-data ./* sudo chmod u+x ./* Speech Synthesis ---------------- sudo apt-get install espeak The espeak package works, but it outputs at 22050Hz, which my external USB speaker doesn't like. This fails: espeak "Test Test Test test test test test test test" This works: espeak "Test Test Test test test test test test test" --stdout | mplayer -cache 1024 -af resample=44100:0:0 -