convert midiValue to dB

[fro]

in my search to translate a midiValue for track volume into dB, i came across this-
i will try to verify it, but if ya get some time jeff, lemme know if this seems accurate or applicable-

link to pdf:
http://www.google.com/url?sa=t&source=web&ct=res&cd=3&ved=0CBEQFjAC&url=http%3A%2F%2Fwww.reason101.net%2Fwp-content%2Fuploads%2F2009%2F11%2Fdb-midi-chart.pdf&ei=1lh9S-bJPMKlnQeFx6jXBw&usg=AFQjCNHCK1DqVl_sk3w1WLW6MpysjpWpcg&sig2=I-y2H7GJGjvvw-5oN3HD1g

ty

fro

[Jeff]

I didn't try to follow any published chart like this so I don't know how
accurate it is. Internally Mobius uses a "squares curve" for attenuation
between 0 and 127. This is not exactly an exponential curve like
most hardware devices use but fairly close.

One thing to note is that Mobius will never make a signal louder, it only
attenuates it. So 127 is what you put in, which I guess would be 0db.

db values are all relative anyway so saying that Mobius is at -6.6db
doesn't really mean anything since it is relative to the strength of the input
signal.