Audiovox D1929B Instruction Manual page 17

6. A-B Repeat
a. During playback press A-B button to set the Starting Point A.
A-B Repeat Starting Point Screen Display
b. Press A-B button a second time to set the Ending Point B and
the player will repeatedly play the part between Point A and
Point B.
A-B Repeat Ending Point Screen Display
c. Press A-B button a third time to cancel A-B repeat and resume
normal playback.
A-B Repeat Cancelled Screen Display
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