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Name Size Revision Age Author Comment
adpcm.vhdl 10.6 KB 1519 about 3 hours markw ADPCM decoding bug
channel.vhdl 3.37 KB over 5 years markw
top.vhdl 19.7 KB 1510 2 months markw Use natural signed/unsigned source depending on...

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# Date Author Comment
1519 05/27/2026 10:34 PM markw

ADPCM decoding bug

1510 03/24/2026 09:59 PM markw

Use natural signed/unsigned source depending on which chip. Mix with signed, with a dc blocker. Add a bit more dither to make the mid level voltage acceptable through the sigma delta, since it now sits a 2.5v for silence (internally, external is ac coupled). This fixes the sample engine clicks when playing mod files due to the sample engine volume being applied on unsigned converted samples, which gave a dc bias betwen samples. Paula samples have to end/start at signed midpoint you see.

1502 03/10/2026 08:37 PM markw

Specified as RW in dev guide

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