01XX 04h-07h /_________ (same as 0Fh)
1000 08h \\\\\\\\\\
1001 09h \_________ (volume remains quitequiet)
1010 0Ah \/\/\/\/\/
1011 0Bh \""""""""" (volume remains high)
1101 0Dh /""""""""" (volume remains high)
1110 0Eh /\/\/\/\/\
1111 0Fh /_________ (volume remains quitequiet)
When using the volume envelope generator, the volume is always increased from 00h to 0Fh (or vice versa), it is not possible to specify a starting/ending point (like from 00h to 07h).