
GM mixer channel strips in the Logic Pro for Mac Environment
The MIDI channel strips work as a remote control for the mixing parameters of the controlled sound modules and synthesizers (volume and pan, for example).
If your sound source understands bank select events, you can choose the bank number with the Bank parameter field at the bottom of each channel strip (only visible if the Bank parameter in the Object inspector is selected). Remember that not all synthesizers support bank select events. You can use several different bank select formats (see Mapped instruments in the Environment).
The Program button allows you to select a sound by name. Click it to open a pop-up menu that contains all GM sound names. Each channel has its own pop-up menu.
The Volume fader controls the output level of a MIDI channel. Adjusting it sends controller 7 via your MIDI interface.
The Mute button switches the volume of the channel between zero and the current Volume fader position. In practice, this means that if the button is selected, the channel is muted. If you deselect the button, the current Volume fader position (and value) is used.
You can assign any controller to each of the knobs.
In addition to the GM Standard, there are extended standards created by Roland (GS) and Yamaha (XG). GS and XG mode allow you to select different effect programs, and to control the level of the reverb and chorus effects.
The Reset button transmits a GS On or XG On command, and resets all controllers to neutral positions. This allows you to reset all connected sound modules to their standard settings, and begin a mix from scratch.