OPLL frequency calculation & pitch bend - BLARGH!?

WORP3, well, your calculation is the same as my script, in combination with:

variable loga [expr log(pow(2, 1/12.0))]
variable r3 [expr log(440.0)/$loga - 57]

proc freq_to_note { freq } {
        variable loga
        variable r3
        return [expr {($freq < 16) ? -1 : (log($freq)/$loga - $r3)}]
}

Sorry for resurrecting the thread but I need an info about volume control in OPLL

R#30,R#31 and followings hold the volume on 4 bits, 0 is the max amplitude, 15 is the minimum volume.
Actually 15 is not MUTE, just very low.

How can I mute a channel ? I did that by resetting octave and f-num to 0,
This gives frequency = 0Hz, but there has to be something more appropriate, isn't there?

Thanks! Yes it was for that.
I'm having problems with volume encoding
What is the rule in linear ratios of the max level?

I was thinking to map the Keyon bit as corresponding to value 15 of volumes, provided that 15 is just a strong attenuation but it is not mute.
Maybe I should map volumes on 17 levels and use the 17th level as mute

Anyway my error is in the way I used to convert volumes.
I used linear volumes but it is not correct

I will try this
Reg30= - 20 log10( volume/vmax )/45 *15

the new formula works much better
new files here