I have a pi zero I'm not using, I could probably build a music player
chaowo
I think double-ended usb drives are a thing, you could probably attach one of those for storage so that you can easily add music
@unascribed @chao @xenon is there no chance with alternative fs, or a Ο4 connected to a SSD & also works as a server, connected to a working Ο4 screen?
@_microbe101 and for the Pi4 solution I believe you've just reinvented the NAS
@_microbe101 if you mean over USB: i don't believe any Raspberry Pi supports running as a non-host USB device unmodified
you'd need at least a custom kernel
@unascribed thanks for your input, NAS was a solution what a friend of mine does, the kernel change sounds not a good idea (slow, no response notification)
but i'll learn more about that. 
@_microbe101 @unascribed ...I've been thinking about a Pi Zero MP3 player for a bit.
I've considered solutions to the "music transfer" problem.
One is to use the USB-OTG feature of the PiZero:
https://magpi.raspberrypi.org/articles/pi-zero-w-smart-usb-flash-drive
Another is a USB direct transfer cable, called "host-to-host":
https://www.linuxquestions.org/questions/linux-hardware-18/usb-host-to-host-cable-which-one-575469/
And a third would be a networked option, like a Samba share over wifi.
you may consider https://www.adafruit.com/product/1381 instead of a whole computer. or this boi if you have a microcontroller already https://www.adafruit.com/product/1681
does encoding of vorbis/wav and decoding of vorbis/flac/mp3/aac/wav all in hardware at a very low energy cost!
@xj9 @unascribed @_microbe101 hmmmmmmmm that looks shiney.
@_microbe101 anything is possible with an alternative fs assuming the usb drive can do it, but i suspect the micro USB and USB sides are connected to the same places on the board precluding any of this from being feasible
and communication over a filesystem without any form of notification of change or a way to send interrupts is gonna be slow as hell