1.14(.1) requires Fabric! Loader and Fabric API

1.13(.2) requires Rift! https://minecraft.curseforge.com/projects/rift

Play your tunes (mp3/ogg/wav/m4a/flac) inside Minecraft. Browse your folders (and drives) and play the songs in them. Also opens playlists (m3u/pls). Not exactly a necessary mod, but I was bored waiting for MCP to ever update

Press J while in game to bring up the interface. In-game, you can press P for play/pause, or [ and ] for previous and next track, or - and = for volume down and up. These are all bindable (and unbindable) in the minecraft controls menu. Double click file to play. Volume and position in song are adjustable. Remembers your last used folder (and volume)

Mod Review: https://www.youtube.com/watch?v=7Z7G-yMXn3Y
Mod review (auf Deutsch): https://www.youtube.com/watch?v=gppbvqOh6X0

TODO:

DONE add OSD (On Screen Display). still TODO - improve it. Show somewhere other than in chat perhaps, or display a graphic for play/pause/stopped or something
"Now playing" field in interface. Probably an editable "Current directory" field as well so one can change directories without clicking through the whole file tree.
DONE maybe a convenience link in the root directory pane to the Minecraft music folder :) You can still get there, through c:\users\username\appdata\roaming\.minecraft\assets\virtual\legacy\music(orRecords). OMG. Yeah definitely a shortcut to that haha
read id3 tags and ogg tags maybe
allows songs to be queued to play next (outside their normal order)
add shuffle button
possibly edit/create playlists

Known issues:

occasional troubles with VBR MP3s. Variable bitrate may or may not work.
seeking in m4a encoded with lossless ALAC codec works fine, unless it is mono (not stereo). If it's mono, seek breaks past 25% or so. Just have to listen to it in order ;)

modpacks: This may be used in modpacks if

you give credit / link to this page
you do not make money from the pack (ie it is not hosted behind adf.ly links or things like that)

1.14 install:

Install fabric loader
put fabric API jar in your mods folder
put MineAmp .jar in your mods folder

1.13 install:

install Rift. for 1.13.2, get it here: Rift 1.13.2 snapshot
download the MineAmp .jar file and put it in your minecraft/mods folder
select the rift profile in the launcher

1.12.2 and below install:

install liteloader (this is required)
download the MineAmp .liteloader file and put it in your minecraft/mods folder
select the liteloader profile in the launcher (the liteloader installer can chain this to Forge, so this mod works fine with Forge too)

MineAmp