. . . I was just curious if there's any other way to play my local music from my hard drive . . .
Yes, there are. We have similar conditions; I have iPhone and iPad and almost the same amount of stored digital music on my home network that I can also access away from home. I also have lots of stored m4v movies I can access as well. Over the past few years I have been storing my media on my WD My Cloud NAS, and not on any other hard disks in the network any more. I keep no media stored on my iThings, and am dependent upon accessing my home network from afar. I also have a virtual cloud I can access via internet to stream from. For when there is no internet (or only poor quality internet) available, I have wireless drives that contain my media files.
Currently, I mostly access the My Cloud. The NAS is on the home network 24/7, does not need a PC on, and is what many people are using for storage of media today. Very accessible. So, by using the WD companion app called My Cloud (as well) I can access the NAS from the phone or Pad to play music, video and photo media; either when at home or away. My Cloud devices come in various price ranges, capacity and speed.
I also can access my home network via a router app. My Asus app has an app called AiCloud that can access all the drives and devices on my network with shared content. Before I had a NAS, this is what I was using, and can still use. It even accesses the My Cloud's contents.
My virtual Cloud is called Pogoplug, and I only have movie files in it I can access via the internet. Last week while out of town I streamed a lot of movies to iPad for my little granddaughter to watch.
If you need anymore info about this ways to stream remotely, let me know. I have other ways, too, but these are what I mostly use.