John,

I tried that and it works but is very slow on the timeline.

I reckoned it could be done with the free tool AutoHotkey. But it's outside my skill level so I sought help. I've tweaked and tested the resultant script, which works fine here in MEP 2014 (and in fact globally). I've compiled it and uploaded it here:

https://dl.dropboxusercontent.com/u/4019461/MouseWheel-Horiz-1.exe

Hopefully anyone should now be able to download and run that. It will place an icon in your tray to show it's loaded, awaiting activation. Then to toggle it on or off the hotkey is Shift+F1.

To use, hover the mouse cursor over the timeline orange marker and press the hotkey. You can then use the mouse wheel to scroll horizontally. It moves quite a long way with the settings I've used (otherwise it was painfully slow to get anywhere) but you can always press the left mouse button to get fine control.

Please let me know if it works, as this is my first attempt to export an AHK script for portable use!

--
Terry, East Grinstead, UK

Hi Terry

. . . . I tried that and it works but is very slow on the timeline. . . . .

IMHO it is meant to be slow, scrubbing is specifically used for accurately locating a point in a section of a clip  where a sound starts, first by moving the timeline cursor to the approxiamte point and the using the scrub wheel for fine tuning and hearing the audio, with the idea of making an editing decision eg a cut.

John