Option to Mix and Export using FP32 wav format (and other clipping fixes)

[Hatchling]

I noticed that, sometimes, you'll get clipping if you accidentally let audio get too loud in some areas.

If these issues occur, it can sometimes be easy to fix - at other times, it requires finding each "instrument volume" or "sequence volume" marker and manually decreasing them all by a common factor - alongside every other instrument in order to keep the volume proportions the same.

NOTE: Each instrument channel is individually clamped (-1 to 1) range BEFORE mixing. "Sequence Volume" is only applied after mixing, and will not correct clipping that occurs within a single instrument channel.

Possible solutions:

• When exporting to .wav, mix and encode using floating point formats. This allows the wave file to represent a practically boundless range of values, and clipping can be corrected in post in an audio editor by simply normalizing the sound.
  
• Provide a new tool in the dropdown to scale the volume of all selected notes by a given factor.
  
• Provide a tool to scale all of the instruments' volumes, and their respective markers, by a given factor. (This would be useful for preserving the nuances introduced by distortion, which are sensitive to the volume of the notes but not the instrument volume.)
  

Thank you!