Yes it can, you can “tune” each string individually. The guitarsounds themselves are passable at best, nothing spectacular. The string-, piano-, synth- and brass-sounds on the other hand are stellar. I testdrove one yesterday. Tracking is acceptable and the occurrence of glitches is minimal compared to the 33 or 55 for instanc.
In addition to tuning individual strings, there are lots of settings on GK/hexaphonic capable input devices that can help tracking tremendously by setting them how you play. I am sure the same exists on the GM-800. Example: input sensitivity, play feel, and pitch bend data settings. The last 2 are most important.
Many people who complain about tracking just tried one out at GC and bailed on it when the tracking sucked. Then the flaming started. I have been playing both GR-33 and then a GI-20 (midi only no sound module) for decades. I find the tracking to be pretty great but you have to set Play Feel appropriately. Mine has these choices:
Normal: General picking, thus the standard setting
for play.
Finger picking: The setting for when you want to perform with the feeling finger picking provides. Sensitivity is a little higher than Normal.
Hard picking: This setting is for those who pick rather hard, and the sensitivity is a little lower than Normal.
Soft picking: For picking that is a little weaker. Sensitivity is a little higher than Normal.
Tapping play: When making use of many kinds of picking techniques, such as tapping play (or “right-hand play”), pullingoff, or hammering-on, this setting provides very stable sound expression. The range of power that can be expressed is a bit narrow.
No dynamics: With this setting, no matter how hard or softly you play, you get uniform volume and tone. Use this setting with tones like Synth Lead or Organ when you want to transmit a feeling without expression.
As far as pitch bend data the "Bend Data Thin" function also improves tracking by reducing pitch bend data. If you play with a lot of vibrato you will want this. Another common mistake is to not adjust the bend range. May not be an issue on GR's or on GM-800 for built-in sounds, but as soon as you try to drive a virtual instrument in your DAW it will become an issue and glitching will occur due to overwhelming the plugin with pitch bend data. Example: Piano is a chromatic instrument so I usually set bend range to 0 for triggering keys. Most plugins handle a bend range of 2 half steps just fine but 2 octaves of bend range going into a chromatic instrument is going sound bad.
With all that said any midi pickup will require very clean technique for good tracking since they pickup and transmit things in a less forgiving way than a regular guitar pickup. Example: if you aren't careful then even muted notes can trigger sounds.
