Diasonic Tech DDR-3128R - Manual (Page 8)

2. Map of Menu-MP3 Part
When pressing MENU button, choose EQ. Then LCD screen
displays the contents of EQ. After you choose the section that you
want by moving PLAYBACK button upward and/or downward, then
press the button in to save it in memory.
1. Map of menu-Voice section
When pressing menu button, choose MODE. Then LCD screen
displays the content of MODE. After you choose the part that you
want by moving PLAYBACK button upward and/or downward, then
press the button in to save it in the memory.