Adding new tracks will have a default preset of effects enabled. One of these effects is reverb, which simulates space (hall, room etc).
To remove this effect:
- Open the instrument panel, and turn down the Reverb knob, or
- Remove the separate Reverb from the Effects tab (if added)
Still hear echoes?
It's possible that your recording environment or microphone may be causing this. Try recording in a different place, or use a different mic.