Stable AF Configuration for Music-X?

Howdy folks.

I spent some time here last year, and everyone was very helpful. Thanks!

I walked away from my AF Plus 2009 because I could not find a stable, solid configuration to run Music-X 2.0, but I just bought AF Plus 2010, and am trying it again.

The problem I'm having is erratic tempo, with halts and slow-downs. I also get stuck notes in the main Sequencer screen, but those notes do not stick during playback from the Edit screen. (I have turned off the 'Re-Out' for each MIDI channel, in the Filters screen, so it's not that - I thought it was a MIDI feedback loop).

The closest one to work so far:

UAE Plugin

Emulated Hardware: A600, Basic non-expanded configuration
Emulated Drives: Music-XDisk1 & Disk2
Hard Drives: 'Add PC drives at startup' is checked. This adds my C: drive and a partitioned D: drive that serves as my bridge to the PC side, for finished songs, etc.
Added Hardfiles: 'System2.0.hdf' & 'Work.hdf'. These were moved to my PC from my actual Amiga 600HD, using Amiga Explorer, a few years ago. After loading the 'Work.hdf' image, I uncheck the box marked 'bootable'.
Display: I use the drop-down box to change from Primary Display Driver to my Radeon All-In-Wonder 8500DV. I change the Native Mode dropdown box to Full-window, because I cannot do sequencer work in such a small screen.
IO Ports: MIDI dropdown box gets changed to my USB MIDI Interface (E-MU XMIDI2x2, although I also could use an Roland/Edirol UM-1)

After the Workbench loads, it looks like my actual A600HD's screen, with my familiar desktop icons. I open Music-X from my 'Work.hdf' hardfile, where it is installed on my 'System2.0.hdf'. I have tried running it from the 'Music-XDisk1', but when I try to open any requesters to load a sequence, I get an error, asking me to 'Suspend' or 'Reboot'. Either one requires a restarting of WinUAE.

That's all the variables I can think of right now. If anyone has any help, I would greatly appreciate it. I would obviously love to use the fastest Amiga possible, since complex sequences require complex screen redraws.

I love the look of the AmiKit and AmiSys, but I cannot figure out how to include my PC drives or select my MIDI interface. Same with all the other ready-to-click AF emulations on the 'Applications' tab. So I've been stuck with WinUAE, which is fine if it worked.

Thanks everyone!

This thread has 41 views, but no clues? Hard to fathom.

How about an easier question: which chipset should be used when trying to emulate an A600HD? I believe that WinUAE chooses the AGA by default, but mouse hovering over AGA states: A1200, A4000, CD32 while hovering over Full ECS states: A500+, A600, and A3000.

Would Full ECS provide a more stable timing clock than AGA? Do either of these chips even have anything to do with timing clocks?

Thanks in advance.

[TCD]

Not sure about AF, but the A600 quickstart in WinUAE will set Full ECS.