Quick and easy guide for adding music to Emulatonstation on RetroPie. Noob friendly!

cyperghost

@cool_iron I think there is no problem to install mpg123 as background player just for in game music. This would be the easiest solution.... And if there are occouring problems you can easily remove it.
As you use the python method the python code checks for process PID of a running emulator in background so it seems to be impossible without altering python code. But that's out of my class.

EDIT:
Maybe you can act like this!
I think about a code like this ...

Enable ingame BGM.sh

#!/bin/bash
# PSEUDOCODE!
# DISABLE python check for running processes of emulators by pausing the python script!!!!
# OMXPlayer will still run in background and will play music!
pkill -STOP "python backgroundplayer"

and by editing runcommand-onend.sh you always set the -CONT condition.

But why don't you give the mpg123 no chance? Imho it is the easiest method for BGM but keep in mind that mpg123 is just a small player with a small bunch of command line arguments...

@retroprogrammer Before spamming this thread you can ask @meleu if he want's to add your tuts into his Useful topics thread

retroprogrammer

sorry for spamming guys just wanted to say that their are some other tutorials other sorry :(

Skyfire

Having some issues after getting music playing in the background via this tutorial. On launch of any ROM I am getting an audiomanger error stating the device or resource is in use. Once the game loads I have no game audio.

zerojay

Created an alternative guide for using vgmplay instead of mpg123 to play directly emulated audio rips from game consoles and arcade machines. Much smaller file sizes than mp3s.

https://retropie.org.uk/forum/topic/14682/quick-and-easy-guide-for-adding-emulated-music-to-emulationstation-on-retropie

jonnykesh

@zerojay How much room does it save? For example a track I use is 1:39 and 2.4MB. Would this really save a significant amount of space?

zerojay

@jonnykesh Well, put it this way, if you have a full NES game's soundtrack, let's say 20 songs in mp3 for about 3MB each song, that's 60MB. The emulated version is going to be a small part of the actual NES game's size so there's pretty much no NES game soundtrack in VGM format that will be bigger than 1MB total. Most NES games are about 200-300K for their full soundtrack in this format. Look around for VGM rips as they are a better indicator than anything I can say.

BobHarris

Could somebody tell me which file I have to edit (and what kind of text) to set a startsong which plays everytime when you boot up the Pi?

coldnpale

Great guide! Anyway to choose what track plays first if we have many mp3's in the folder?

mitu

@bobharris Since the command line using mpg321 plays the songs at random, there's no configuration involved.
You could try replacing mpg321 -Z with mpg321 -l 0 (lowecase L, then zero) in the playing script and the playorder should be alphabetical - so you can place a 0_start.mpg3 to be always played first.

BobHarris

@mitu Ok thanks. This is not an option for me, as I prefer a randomized playlist after the first song.
So I will just use the Python script instead (http://www.pretendo.online/2017/01/25/adding-background-music-to-emulation-station/).. so far it seems to work great (and it allows you to set a startsong). It has other perks too, like fade out (after starting a game) and it plays a new song after exiting a game, instead of resuming the previous song.
I wasn't sure which method to use as I read some people were having issues with the Python script. (Songs playing at half speed for example.)

(There is a workaround for anyone who uses mpg123 and wants the same song/sound at the start and a random playlist: Turn your song into an mp4 video file and set it as your splash screen.)

coldnpale

@mitu
amazing! thanks alot!

coldnpale

So, now with "mpg321 -l 0" I am able to arrange the songs in the order I want. Tha's great! However, isn't the playlist supposed to loop infinite times after it ends? Or am I missing a part?

mitu

@coldnpale Err', I guess it only loops through the 1st song, right ? So my suggestion doesn't work right off the bat :(.
I don't have the RPI at hand at the moment, but you could create a .m3u with the files you want, in the specific order you need, then try to run

mpg321 -l -0 playlist.m3u

so it loops continuously. I'm sure there's a one liner to make the m3u on the fly, but just need a command line on the PI to have it right.

coldnpale

@mitu
Thanks!
At the moment i am using 2 songs to test it, withou an .m3u. It plays them in alphabetical order, but once the second song finishes nothing starts again.
But I could always try an .m3u ..i'll give it a shot

BobHarris

@mitu This change in the script (-l 0 instead of -Z) is actually very helpful.
I now have another build with no music in the bgm folder except for the Sony ps1 bootup sound. With this script you hear it only once when booting and then it's all quiet. :-)
It might become my new main build if I get tired of my playlist.

mitu

@coldnpale Ok, I got to run a test and this is what seems to work:

Make a .m3u file with the names/paths of the mp3 files:

/home/pi/music/file_start.mp3
/home/pi/music/file2.mp3
/home/pi/music/file3.mp3
...

Run mpg321 with:

mpg321 -l 0 -@ path_to_m3u_file

replacing path_to_m3u_filewith the actual path of the m3u file.

mitu

@bobharris If you only have 1 file, then just running mpg321 /path/to/mp3file would be enough, i.e. no parameters would be needed.

BobHarris

@mitu Ok thanks!

coldnpale

@mitu thanks a lot! I'll check this as soon as I am back home!

Finnbro

I have a couple questions involving this bgm method, would be interested if anyone has any input.

I've been wanting to modify this where it starts a new song after exiting a game, instead of resuming the same song. My current fix was to edit the /opt/retropie/configs/all/runcommand-onend.sh to be the exact same as the autostart.sh in the same folder. This effectively reloads RetroPie every time I exit a game, and while it does give me the intended effect of playing a new song, it is a bit inconvenient with the extra loading time and not resuming from the same place I was in the games menu. Anyone know of a more elegant method?
Does anyone know of a script where you can have a button that sets a different folder for bgm music, as well as some kind of skip button? I have the on/off button enabled in my RetroPie menu thanks to /u/columboscoat over on /r/RetroPie, but these extra options would be fantastic additions to my build. I have a folder for chiptunes and a folder for remixes, would be awesome to be able to switch them on the fly. I've done some research on the ins and outs of mpg123, but it is way over my head.

Thanks in advance.