I have the digital IO board rather than the analog one (in hindsight I wouldn't have bothered buying an IO board at all). Previously I was using headphones via the headphone jack on my monitor with the HDMI audio. However, I have replaced my old monitor with a new one and one small oversight was the new one doesn't have a headphone jack. So I now have no audio.
What is a cheap option to get audio for headphones? I want as few extra devices and cables as possible. Alternatively I am tempted to return the monitor and get one that I can plug headphones into.