# Value 1 and Value 2 for half sharp Pitch Bend Note Expression

Hi,

I am trying to calculate the Value 1 and Value 2 for half sharp Pitch Bend Note Expression. For the pitch bend:

Value 1 =lsb, The “fine-tune” of the bend. Not always used.
Value 2 =msb, The coarse amount of bend.

Now to increase the pitch of a note by 1/2 sharp! we need to change the pitch by the factor of 2^(1/24) or 50 cents.

My PSR-A3000 Synth bend up to +/-2 semitones. msb and lsb are the most significant byte and least significant byte of a 14-bit number.
So, 2^14 /8 = 2^11. Thus, lsb=value 1 = ‘00000000’ and msb=value 2=‘00010000’= 32

Unfortunately, LE value & value 2 are from 0 to 127 ( corresponding to 7 bit binary number) When I use these value 2 = 32 in Logic editor to bend a note 1/4 tone up, it does not work.

I just checked also with this webpage:

My calculation is correct.

there are 8192/200 = 40.96 pitch bend units to 1 cent.

Therefore, 50 cents is equivalent of 2048 or 2^11. I will check the pitch range cubase is sending.

What am I doing wrong please?