Don't load out of range MMD note numbers

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Don't enforce pitch limits in MMD IFFOCT samples

Our transposition mechanism works inside sample map boundaries while OctaMED
enforce limits naturally when it goes outside its range. We don't have a
mechanism that does that.

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Initial setting for IFF6OCT and IFF7OCT

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>