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Further thoughts...

To differentiate Compress from Qtr Normalize, I would use "Compression Ratio" and "Target level" as the user inputs. Compression could the a list or values of: 1:1, 2:1, 3:1, etc up to 10:1. I don't see a need to go higher the 10:1

Note: The formula does need the Pre-check, if the user enters 1:1 and a new Target_value of 64 of:

difference = max_value - target_value. if difference > 0 then compress = max_value / target_level.

eg: If the user has a data input range of 1-127 and chooses 1:1 compression, and a new target_level of say: 64. Then the new compressed_values can go negative.

The above Pre_check will add a 'small' amount of compression to span/scale the data over the new velocity range of 1-64

The previous attached compare_normalize.txt has the code I used.

Happy to contribute. Dave M (down under NZ)