ATARI ST MV16 Sound Audio Card Cartridge BAT Ubisoft for gaming and module trackers
Original Concept by:
Hervé Lange, Olivier Cordoléani (BAT, Ubisoft 1989)
Reinvented by:
DoG (Exxos Forum 2021)
Edoardo Auteri (Japan 2023)
BOM list, Centroid files, Schematic, Assembly drawings are provided.
Tested on ATARI ST and STe.
Main Characteristics:
- 12 bit (8 bits x 16 voices/channels) DAC converter with mono OAMP and 7.5kHz LPF.
- It uses the address bus to send the 12 bit sample for conversion.
- Address lines A1-A12 offsetted by the cartridge into available memory space.
Compatible with:
B.A.T.
B.A.T. II
Music Master
Some MOD-Players
Audio Sculpture
Digi Composer
TCB tracker
Noisetracker 1.5
Improvements:
- Reduced form factor.
- Higher noise immunity (ferrite beads and decoupling caps at the power rails, minimized routing and solid ground planes).
- Use of resistor networks at ±0.30% (including tolerance and matching ratio) for a better DAC linearity.
- Option to set 10X gain and bass boost for speakers and headphones.
Note: 2.5X gain is possible with C10 = 10uF + 1.2KΩ resistor (to mount on GAIN/BOOST selector 1-2 position).
- R4 and C11 get connected in
series to give a special
bass effect. Also, the output
gain relies on a bass frequency.
In this case, a 25dB gain
equates to 100Hz, and a
19dB gain equates to 2kHz.
Note: R4 can be either 10KΩ and 100KΩ
for achieving an intense bass boost.
- R3 and C9 enhance a
high-frequency load,
providing stability.
- C13 filters radio interference
picked up by the audio input
connection.
Audio sample (CODE) in the attachment. First half, YM output. Second half, reMV16 output.
ATARI ST MV16 Sound Audio Card Cartridge BAT Ubisoft for gaming and module trackers
*PCBWay community is a shared platform and we are not responsible for any design issues.
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