Free Solution:
You have a Google Chromecast Audio, so use it. Download and install Google Chrome and enable Cast. Then you can Cast the Desktop Audio to the Chromecast. However, it doesn't work with iTunes. A work-around is to upload your iTunes library to Google (first 50000 songs free).
If you had an Android phone, you could use BubblePNP and just play the music stored on the phone. This is what I do. I stuck a big ass micro-sd memory card in my phone and carry around a lot of my favorite CD's including some Hi-Res. When they announce 2TB micro-sd, I'll be the first to pre-order. Then I can fit my entire music library on the Phone and dump the music server. Again, iTunes not supported.
https://support.google.com/chromecast/answer/6279396?hl=en&vid=0-1189761614155-1502287144843
You have a Google Chromecast Audio, so use it. Download and install Google Chrome and enable Cast. Then you can Cast the Desktop Audio to the Chromecast. However, it doesn't work with iTunes. A work-around is to upload your iTunes library to Google (first 50000 songs free).
If you had an Android phone, you could use BubblePNP and just play the music stored on the phone. This is what I do. I stuck a big ass micro-sd memory card in my phone and carry around a lot of my favorite CD's including some Hi-Res. When they announce 2TB micro-sd, I'll be the first to pre-order. Then I can fit my entire music library on the Phone and dump the music server. Again, iTunes not supported.
https://support.google.com/chromecast/answer/6279396?hl=en&vid=0-1189761614155-1502287144843