When the EBow is placed into position, the string in the DriveChannel will begin to vibrate. For a faster response, add more pressure on the EBow (see Pressing). For the quickest response, tap the fretboard harder with your left hand or tap the EBow into position (see Spiccato). Moving the EBow across the strings activates each string as it leaves the EBow GuideGroove and enters the DriveChannel (see Cross-String Bowing).
Or see and hear it: