Set up alsa on vagrant

Should work on linux and macos, I only tested osx and was able to hear sound coming out of it using mpg123 on the command line.

LibreTime probably still needs some fixes to make this work as intended.

Vagrantfile

@@ -15,8 +15,29 @@ Vagrant.configure("2") do |config|
   config.vm.provider "virtualbox" do |v|
     # to run without OOMing we need at least 1GB of RAM
     v.memory = 1024
+
+    # enable audio drivers on VM settings
+    # pinched from https://github.com/GeoffreyPlitt/vagrant-audio
+    config.vm.provider :virtualbox do |vb|
+      if RUBY_PLATFORM =~ /darwin/
+        vb.customize ["modifyvm", :id, '--audio', 'coreaudio', '--audiocontroller', 'hda'] # choices: hda sb16 ac97
+      elsif RUBY_PLATFORM =~ /mingw|mswin|bccwin|cygwin|emx/
+        vb.customize ["modifyvm", :id, '--audio', 'dsound', '--audiocontroller', 'ac97']
+      end
+    end
   end
 
+  # ubuntu/trusty64 alsa setup
+  # slightly modernized from  https://github.com/naomiaro/vagrant-alsa-audio
+  # https://wiki.ubuntu.com/Audio/UpgradingAlsa/DKMS
+  config.vm.provision "shell", inline: <<-SHELL
+     alsa_deb="oem-audio-hda-daily-dkms_0.201703070301~ubuntu14.04.1_all.deb"
+     wget -nv https://code.launchpad.net/~ubuntu-audio-dev/+archive/ubuntu/alsa-daily/+files/${alsa_deb}
+     sudo dpkg -i ${alsa_deb}
+     rm ${alsa_deb}
+     sudo DEBIAN_FRONTEND=noninteractive apt-get -y -m --force-yes install  alsa
+     sudo usermod -a -G audio vagrant
+  SHELL
   config.vm.provision "shell", inline: "cd /vagrant; ./install -fIapv --web-port=9080"
   config.vm.provision "shell", path: "docs/scripts/install.sh"
   config.vm.provision "shell", path: "docs/scripts/serve.sh"