Remote Control from Airfoil Speakers
Airfoil Speakers offers remote control of selected audio sources being transmitted by Airfoil. A list of supported sources is available for audio being transmitted by Airfoil for Mac and for Airfoil for Windows.
Using Remote Controls
When Airfoil Speakers is receiving audio from Airfoil for Mac 4 (or later), the remote controls will automatically appear if the source supports them. It will look something like this:
Simple remote controls
These should be straightforward - click back to jump back a track, forward to jump forward, and play/pause to toggle playback.
Buffered Controls
Airfoil uses Apple's AirPlay audio streaming protocol, which buffers audio for approximately two seconds before playing it back. Because of this, when you click a remote control button, the result is not immediately heard. When you click a button in Airfoil Speakers, you'll see a brief spinner, like this:
Note the spinner around the Play/Pause button
Once the spinner stops, you'll hear the result of the action.