Pianoteq and TriplePlay

Within Logic Pro, you may need to open up the Midi Editing window by double clicking on the midi notes, and view the "lengths" of the notes you say are being played very staccato in the newly opened Midi Edit window.  There are two possibilities happening here:

1), the notes really "are" captured with very short durations, in which case, you can highlight a bunch of them, and drag their representative lengths to the right to lengthen them to taste.

2) there is also the possibility that your guitar-type controller is sending out more than one copy of each note on the same midi channel.  In this case, even though the length of a single note "looks" okay, there might be another note hiding under the original note that needs to be removed.  To see if this is the case, simply highlight one note that is playing "excessively short" and temporarily drag it up an octave or two -- and look to see if there are any "ghost notes" that remain in the original position. 

If these ghost notes (my terminology) are present, you will need to get rid of them before returning the original note back to its original position.  Here is what happens, in the event a ghost note exists:  both the original note and the ghost note will start at essentially the same time, but the note-off message of the very short ghost note will cause the original note to also shut off.

Hope this helps.

Cheers,

Joe