My settings are Analog(3+4) and the meters of the Main are still working.
I'm not certain that the problem springs from BF, I have tried the sound from the computer's first soundcard. the meters work but it is silent too.
I don't know what to do about it.
Thanks.

please provide a screenshot of your totalmix window, which exactly shows what is "green" or where a signal is being displayed.

To which analog outputs are your monitors connected ?

The usual way is to create the screenshot with the Windows snipping tool, save it i.e. as JPG file.
This file you place i.e. on Dropbox.
With the Dropbox URL you link this here as picture.
At the end of the Dropbox links there is ".....dl=0" change it to "....dl=1" then its directly visible here in the forum.

Furthermore I simply assume that you did not configure the proper routing in TotalMix FX.
Its very simple if you know the basic concept.
In TM:
- Make sure that you are in submix mode.
- Then click on the hardware output where phones are connected to
- Then raise / lower the fader of channels under "Hardware Inputs (1st row)" "Software Playback (middle row)" or mute them as you like / need

If the music comes from a player or from your DAW, then you will see the playback in the middle row to where you configured the application to send it out .. There you need to ensure to raise the fader to 0dB (assumed you are in submix mode and has before clicked/selected the Output channel of your phones).

So your recording interfaces has so many "submixes" as it has Hardware Output channes (lower row in TM).
Simply click to an HW output and "dial in" the routing which you require, by moving faders as described or muting a channel ...

If you have several standard routings, then save these to one of the 8 Snapshots on the right hand side to be able to recall them quickly and easily.

Dont forget to save your settings (save snapshot, workspace) and you can even assign this TM view together with its settings and 8 Snapshot into one of the 30 Workspace Quick Select slots ... once you are more comfortably with it, all is "isi pisi" and very user friendly.

You should maybe watch the RME training videos and read my blog article about 1st setup and usage.

http://www.tonstudio-forum.de/blog/inde … al-Videos/
http://www.tonstudio-forum.de/blog/inde … rnal-equi/

So I see in the middle row that your application sends output to Software Playback Channel AN 3/4.
And this seems to be routed to Main Out. To which output channel is Main Out assigned ?
Click with the mouse to the assign button, then move the mouse pointer to Main Out and look which channels in the list are in "boldface".

You mean because no green bar visible in the LED meter of AN 1/2 ?