This wall of text is copied from http://www.akaipro.com
"Using Scenes (the horizontal row selection and Scene Launch), you can trigger playback of an entire row of clips in Session View with one move. You’ll notice five Scene Launch buttons on the APC40 to the right of the Clip Launch / Session Overview buttons for this purpose.
Once you have built your session to include lots of clips and scenes, you’ll likely find yourself using the APC40’s Bank Select buttons to navigate through scenes. The Bank Select buttons move your scene selection in Live up or down by five. By mapping an assignable knob to the Scene Select function, you can move by one row at a time without changing the highlighted scene. This is helpful for more exact control, particularly in live settings.
To assign an APC40 knob to Scene Select, first determine which knob you would like to use. We like the Cue Level knob for its location near the Scene Launch buttons, but you can use any knob you like.
Select the knob bank you wish to assign to Scene Select. If you choose an assignable knob, you want to choose Bank 2 – 8 so that you don’t override the default Bank 1 knob behaviors Press and hold Shift on the APC40 and press the desired Bank number (red numbers next to global and Device Control buttons on APC40)
Enter MIDI Map mode in Live
You will see a button in the Master Track now show a row of buttons associated with the Scenes. Press the Scene Select button on the right (Circled in Fig. 2).
Move the knob on the APC40
If you make a mistake and move the wrong knob, just delete the assignment from the MIDI Mappings window on the left, while in MIDI Map mode by clicking on the mapping and pressing delete on your keyboard
Exit MIDI Map
You can now use this newly assigned knob to scroll through Scenes easily and individually without losing the current Scene highlight."
So the instructions you gave me should be correct, Sato. I’ve got a feeling that changing the banks is only done in the software (only doable in Live), and is not “physical” (doesn’t change the CC).
"Up the top left we have a set of 8 knobs that are used for panning and sending audio tracks off to your send return track. The 8 knobs will manipulate parameters depending on whatever one of the 4 buttons below the knob is selected (Pan, Send A, Send B and Send C).
The 8 device control knobs are laid out the same as the track control knobs, holding down the shift key and pushing any of the 8 buttons below will move you to the next bank of 8, so you have 64 device control knobs."