Four sixteenth notes can be played in the same amount of time as one quarter note.
In general, the time value relationships of musical notes are as follows:
- 4 sixteenth notes = 1 quarter note
- 2 eighth notes = 1 quarter note
- 1 half note = 2 quarter notes
- 1 whole note = 4 quarter notes
So, to clarify, two quarter notes would take twice the time of four sixteenth notes.