Raspberry Pi Broadcastify Build

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Revision as of 09:02, 23 August 2015 by Blantonl (talk | contribs)
Raspberry Pi Broadcastify Feed Appliance

These instructions show you how to purchase and setup a completely self contained Raspberry Pi to broadcast a live audio feed to

These instructions have been verified and tested as working on a Raspberry Pi 2 Model B Project Board - 1GB RAM - 900 MHz Quad-Core CPU.

If you want to skip the build process, you can download our preconfigured Raspberry Pi image here Raspberry_Pi_Broadcastify_Image

Purchase Equipment

Raspberry Pi 2 Model B Project Board - 1GB RAM - 900 MHz Quad-Core CPU

Power Supply for Raspberry Pi

Memory Card for Raspberry Pi

Case for Raspberry Pi (optional)

Inexpensive USB sound card ($1.70)

1/8 inch audio cable to connect scanner to USB sound card

Install Raspbian OS

All testing and configuration was done using Raspbian

Install pre-reqs and update raspberry pi to latest version

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install git cmake build-essential lame 
sudo apt-get install libmp3lame-dev libvorbis-dev libshout-dev libtwolame0 libtwolame-dev
sudo reboot

Configure the Sound Card

  • Plug your scanner's headphone jack into the mic jack on the USB sound card dongle
  • Start alsamixer
pi@raspberrypi:~# alsamixer
  • press F6, choose the "USB Headphone Set" entry
  • press your tab key to select the "Capture" device volume control
  • use your "up arrow" key to adjust the level to it's lowest level possible (6)
  • press escape to exist alsamixer
  • run the following command to save the volume settings
sudo alsactl store

Two Choices of Software to Broadcast

We recommend the darkice install and configuration method

Method 1: Darkice Install and Configuration (Recommended)

  • download the precompiled version of darkice
  • uncompress the files
tar zxvf darkice_bcfy_v01.tar.gz
  • move the files to the proper places and make sure they are executable
sudo mv darkice /usr/bin
sudo mv darkice1 /etc/init.d
sudo mv darkice.cfg /etc/darkice1.cfg     <--- note the "1" in the /etc/darkice1.cfg you are copying to
  • Edit the /etc/darkice1.cfg file to match your settings, including the sound card you are using, your feed server, mount, password, and description, then exit and save the file
sudo nano /etc/darkice1.cfg
  • Enable the feed to start broadcasting at boot
sudo update-rc.d darkice1 defaults
  • Start your feed
sudo service darkice1 start

Method 2: Ezstream Install and Configuration

sudo apt-get install ezstream

Create the following configuration file at /etc/ezstream_bcfy.xml and replace with your mount, password, and stream name. If you plan on having multiple streams make sure and create a separate named configuration file (i.e.'/etc/ezstream_bcfy2.xml) for each stream and reference accordingly in your command script below.

    <svrinfoname>Stream Name</svrinfoname>
  • Run this command to start the sound card broadcast
arecord -f dat -c 1 -D hw:1,0 | \
/usr/bin/lame -r -s 48 --resample 22.05 -m m -b 16 --cbr --lowpass 4 - - | \
/usr/bin/ezstream -q -c /etc/ezstream_bcfy1.xml > /var/log/bcfy1.log 2>&1 &

Note: very little volume will be needed from your scanner - adjust the levels as appropriate for a good sounding feed.