Create Batch Downloader For Website URL

I have a directory on my web server filled with my own .mp3 files that I want to distribute to Windows devices, iDevices, Android devices, etc. My thought is to have a URL that *any* browser can go to, regardless of device or platform. Every *.mp3 in the directory shows up on the web page (form) with a checkbox next to it. There are two buttons at the top... "Select All" and "Download Selected". Individual files can be selected or unselected clicking the checkboxes. Once the "Download Selected" button is clicked, the selected files batch download individually. They need to be playable once received, so .zip etc. isn't an option. Also there will be over 200 files, so starting every stream at once should not be attempted. I don't need user registration, download counters, IP tracking or anything else. I don't need to hide the file names or URL. I just need a maintenance free batch downloader for .MP3 files. (Should detect all .mp3 files in the directory so I need to do is upload new files and they will become available.) Any script language is fine as long as it works on browsers for all three platforms... Apple, Microsoft, and Android (2.3+) PM me with any questions or ideas for modifications from my specifications above.