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stefandrissen / SAM-MOD-player

SAM MOD player, an Amiga MOD player for the SAM Coupé
https://www.worldofsam.org/products/sam-mod-player
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fix SAA volume tables #1

Closed stefandrissen closed 5 years ago

stefandrissen commented 5 years ago

The volume tables are calculated with 4 bits in mind, but the lowest bit of the SAA 1099 is inaudible. Adjust volume tables to 3 bits.

stefandrissen commented 5 years ago

fixed by https://github.com/stefandrissen/SAM-MOD-player/commit/c5e5e978a526c975af11711786e5da82661a279d

While the volume tables are now calculated at 3 bit depth (and doubled), effectively the output is identical to 4 bit volume tables, since the bottom of the 4 bits is inaudible.

The 4 bit table was 0 - 15, which (with bottom bit chopped off) is 0 2 4 6 8 10 12 14 The 3 bit table is 0 - 7, which is then doubled, so is also 0 2 4 6 8 10 12 14