Word Hunt: Audio Player Terminology

Solution 1:

1. The Marker that represents the current position (time) in the Song.

Answer:

Seek Bar Thumb (more of a programming term) or Slider Handle

2. A term meaning "The current position (time) in the song".

Answer:

Current Time or Elapsed Track time

3. A term meaning the entire time, buffer, needle, etc. mashed up into a widget.

Answer:

Seek Bar

Note: I have no references to this answer. I once worked on a requirement to design a sticky media player widget and I know these terms thanks to the wire-frames provided by UX team. Just search with the aforementioned terms in StackOverflow. You'll find numerous pertinent questions and usage examples.

For instance, see questions related to seek bar or seek bar thumb.

Update:

As @Chris H notes, seek bar thumb seems to be more of a programming term. I have updated answer accordingly.