Changes
PSG
,/* 0Dh - Volume Envelope Shape (4bit) */
| 1010 || 0Ah || <code>\/\/\/\/\/</code> ||
|-
| 1011 || 0Bh || <code>\"""""""""‾‾‾‾‾‾‾‾‾</code> || volume remains high
|-
| 1100 || 0Ch || <code>//////////</code> ||
|-
| 1101 || 0Dh || <code>/"""""""""‾‾‾‾‾‾‾‾‾</code> || volume remains high
|-
| 1110 || 0Eh || <code>/\/\/\/\/\</code> ||
