Bart,As Rick said, the easiest way to get audio from your laptop to a Raspberry PI is with a USB sound card.On the other hand, it sounds like you have already built a DAC and interfaced it to the PI. Presumably, you have some code that allows you to send data to the DAC from the PI so all you need is to get the audio data from your laptop.My first approach at this would be to copy a WAV file from the laptop to the PI and then send the data from the file to the DAC.
WAV file format is easy to find and decode. it is likely that there is some code for the PI to do that already.Another (much more complicated) approach would be to make software on the PI that would emulate a USB sound card to get the laptop to send the audio data. I'm sure there's an easier way than that though.Good luck with your project and let us know how it turns out.
