2

• Reverse button: Reverses the contents of the tape loop, so the sound plays back in
reverse. You can activate Reverse when Loopback is either playing or stopped.
• Fade Out button: Gradually lowers the volume level of the tape loop over the time
specified in the Fade Time field. The Fade Out button remains highlighted until the
fade-out has finished and playback stops.
The fade-out affects only previously recorded material. You can start recording during
a fade-out, and the new material is recorded and plays at full level. When you record
new material during a fade-out, Loopback does not stop when the fade-out has finished,
but continues playing the newly recorded material.
• Count-in button: Enables a one-bar count-in, using the concert time signature.
• Metronome button: Turns the MainStage metronome on or off.
• Undo button: When pressed during playback or when stopped, removes the most
recently recorded take from the tape loop. Pressing Undo during the first beat of a new
take removes the previously recorded take.
Using the Loopback Information Display
The information display shows information about several key aspects of the audio material
in the tape loop, and lets you edit some of the displayed values.
• Position field: Indicates the current playhead position.
• Length field: Displays the length of the loop.
If Sync is set to Off, Loopback analyzes the first take and determines the tempo and
length, using the concert tempo as a starting point. After the length is set, it cannot
be changed (until you clear the tape loop).
If Sync is set to On, you can set the length (in the information display, or using a screen
control) before you record the first take. If you do not set the length, Loopback analyzes
the first take and sets the length using the concert tempo, rounding up to the next
whole bar.
• Position dial: Displays the current playback position in the context of the overall loop
length.
160 Appendix B The Loopback Plug-in