The menu 'track' contains a number of sub-menus which allow to manipulate the active track (with the blinking cursor). Some of the commands are applied only to the time-interval defined by punch-in and punch-out. So these temporal bounds have to be set in advance, either by navigating the cursor to the corresponding fields or by pressing '1' for interactively setting the punch-in time and '2' for punch-out while the music is playing.
Duplicate: The active track is copied to the first empty track in the list. CuSE does not yet provide the possibility to undo the last action. So it can be a good idea to copy a track prior to its manipulation. You may want to mute the original track when working with the copy. Otherwise, each note is played duplicated. That unnecessarily occupies voices on you sound source and sometimes creates a strange 'flanger' effect because frequencies of your chosen sound may be canceled out.
Deleting an unnecessary track is as easy as pressing the del-key. You will have to confirm a simple dialog-box before the action is actually carried out.
Quantize: Quantization means to move every note to the nearest temporal bound of a chosen granularity. When quantizing to 1/16th notes, each time stamp of a note-on/off MIDI-event will be altered such that it coincides with the nearest 1/16th note. As an effect, small timing errors will be wiped out by quantization. On the other hand, all the temporal interpretation a musician has put into the play is lost as well, so the function should be used with care or it should be applied for test on a duplicated track only.
Erase beats: There is not much to be said about this option. It simply erases all played notes between the punch-in- and -out time.
Copy beats copies all MIDI-events between punch-in and punch-out to the current location shown by the 'locator'-field. So the tracks to be copied have to be defined first, then the song must be played to the destination of the insertion or the 'locator' has to be set manually.
Transpose is also applied only to the notes played within punch-in and punch-out. The user defines in a dialog-box about how many half-tones the music will be transposed.
Time shift defines the number of quarter notes the slice of music between punch-in and punch-out is moved forth (positive values) or back (negative ones). Fractions as be used to obtain an arbitrary granularity.