The house I live in has integrated speakers and they are all hooked up to an old AV receiver (Marantz NR1604). Currently it is annoying to play music through the receiver because essentially I have to plug my phone directly to the receiver. I am looking at other options.

Currently I set up a RaspPi to run Volumio, then I connected the RaspPi directly to the receiver. This allows me to play music from a music library (eg. a NAS) but I still can't easily stream music from my phone to the receiver. I'm wondering if anyone has any set up ideas for easy streaming from phone or computer to the AV receiver.