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The Newzealand Story New Set sound fix

Tailsnic Retroworks

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Hi. I want to share an improvement I have discovered after studying the 2 versions of The Newzealand Story sets.

When I plugged my new set board, I noticed the sound was really bad comparing with the sound of old set board. The midi sound effects (arrows, bombs, impacts, jumps...) were really low and with bad quality.

PXL_20250727_144454611.jpg


After inspecting the 2 boards differences, I saw The Newzealand Story old set used one 4558D for sound mixing.

PXL_20250727_144431376.jpg


And The Newzealand Story new set used 2 x 4558D. This is because new set is a re-launch of the game using unsold boards of the game Kabuki-Z, and Taito didn't adapt the sound section of the game as it should be.
PXL_20250727_144505193.jpg


So, what we need to do is to inactivate one 4558D section and put the correct resistors values.
For that you only need:
- Quit R25, of 8'2Kohm
- Replace R20 with the previous 8'2Kohm resistor that was on R25
- Replace R17 with 6'2Kohm resistor
PXL_20250727_144607114.jpg


PXL_20250727_144629783.jpg


PXL_20250727_144657798.jpg


Enjoy the sound fix to the fullest.
 
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