3.10 FX-Mixer
To add an FX-channel, press the + button on the right. You can delete or move an FX-channel by right-clicking on it and choosing the desired option from the context menu. You can also rename an FX-channel by double-clicking on its name.
Each FX-channel has separate left and right (stereo) volume indicators located on each side of the fader slider control, but the left and right volume cannot be controlled independently by the fader, it controls both simultaneously. To change the volume of an FX-channel, drag its fader up and down with the mouse. You can also add an Amplifier effect to balance channels.
Each FX-channel also has a Mute/Unmute LED toggle switch below its name.
An FX-channel can be selected by clicking on its name. The name will turn from white to green, and only one FX-channel can be selected at any time. When an FX-channel is selected, the Effects Chain for that FX-channel will display in the Effects Chain box at the far right end of the window.
When selecting an FX-channel, you can click on "Send" on another channel to send its signal to it. You can use the knob to control the level of signal that is sent to the channel.
3.10.1 Master FX-channel
By default, all instruments have their "FX" initially set to channel zero which is the "Master" channel at the far left end of the FX-Mixer window. The Master channel controls the overall volume of all the combined instruments and FX-channels. Also, it ca function as FX-channel zero (FX0) which allows you to apply effects to the master output (i.e. everything combined).
3.10.2 Add Effects to FX-channels
To add an effect to an FX-channel, select the FX-channel (i.e. click on its name), then click the Add effect button below the Effects Chain box (see image). This will open a dialog box where you can select one effect from the list of all available effect plugins. You can add another effect by clicking the Add effect button again (you can only add one effect at a time). You will get a "Controls" dialog individualized for the particular effect plugin you just added - here you can edit the effect plugin's configuration. Notice that the effect plugin has been added as an entry at the bottom of the stack in the Effects Chain box. Each effect's entry has a standard set of visible controls:
On/Off LED toggle switch (yellow)
Knobs for W/D, Decay, and Gate (these are explained in section Instrument Editor#FX tab)
Controls button that is a show/hide toggle for the effect plugin's configuration dialog
A right-click context menu allow yo to:
remove the effect's entry from the Effects Chain box
move the effect's entry up or down in the stacking order
Also notice that the Effects Chain box itself has an On/Off LED toggle (green) that turns off all the effects on that FX-channel only.
3.10.3 Assign Instruments to FX-Channels
To assign an instrument to an FX-channel, click on its name in either the Song-Editor or Beat+Bassline Editor, depending on where it is located. In the instrument settings window, set the FX CHNL to the FX-channel you want by:
hovering your mouse over the digital readout number and scrolling the mouse wheel
dragging your mouse vertically on the digital readout number
A double-click on the digital readout number will change the selected FX-channel in the FX-Mixer window to the FX-channel with that number. The right-click context menu for the digital readout number has Reset, Copy, and Paste followed by a number in parentheses. The number in parentheses is the number that it will be reset to, or will be copied to the clipboard, or will be pasted, respectively. Multiple instruments can be assigned to a single FX-channel in order to get the same effect on each instrument (e.g. an equalizer).
3.10.4 Channel Grouping
The interface in LMMS for sending channels may be confusing at first sight.
Select a channel except for the Master channel
The other channels should have a "send" button above them
Click on a send button to send a signal to the channel it is attached to
You can adjust the strength of the signal you are sending with volume knobs below the send buttons
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