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| Adjust | On or Off |
| ENV. Mode | Tone A, B or C |
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The AY 3 8912 Chip provide two 8Bit Envelope period Control Register.
Press [+] or [-] for increase or decrease the Envelope Period Value.
| Adjust | Value |
| ENV. Period Coarse | 0 to 255 |
| ENV. Perios Fine | 0 to 255 |
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[my homemade visualization of the the ENVELOPE SHAPE DOWN [1]]
Envelope SHAPE: [0 to 8]
| Adjust | Value |
| ENV. SHAPE | 1 to 8 |
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