KVR Audio

josevin2000 · Post by **josevin2000** » Fri Aug 19, 2005 6:35 pm

well this question is mainly to do with patchscripts ..i work on cubase and never work without a patchscript for my hardware devices.. in the past i have made patchscripts myself for hardware that dont have pre made scripts in cubase...

Now whenever i make the scripts i give bank select message as 2 separate messages namely MSB and LSB... but most pre made scripts, those bundled with cubase have bank select messages as one 14 bit number...

i undersstand that since bank sel message is a cc mess, in every byte( MSB and LSB ) only the last seven digits determine value..

but how is it that one calculates the resulting 14 bit number, i mean what is the formula... besides i am looking at finding out the value in decimal form...

steveholt · Post by **steveholt** » Fri Aug 19, 2005 7:22 pm

Since the high bit will be zero anyway, you can just do (MSB * 128) + LSB.

Steve

josevin2000 · Post by **josevin2000** » Sat Aug 20, 2005 3:55 am

okay say my MSB is 0 and LSB is 32 ( decimal )... what will be the decimanl value of my 14 bit word.... i have noticed figures going upto 16000 or something in the pre made patchscripts... is there any set formula...

steveholt · Post by **steveholt** » Sat Aug 20, 2005 4:37 pm

(0 * 128) + 32 = 32.
(125 * 128) + 0 = 16000.

josevin2000 · Post by **josevin2000** » Sat Aug 20, 2005 4:41 pm

woops dude.... i did'nt get that

josevin2000 · Post by **josevin2000** » Sun Aug 21, 2005 6:23 pm

wait a minute. i think i got u now steve. u are saying that to find the 14 bit value we have to multiply the MSB by 128 and then add the LSB...

So another example . IF MSB is 32 and LSB is 10, then the 14 bit value is 32*128 + 10 = 4106.

Am I right there.

Well dude if i can take this a step further, is there anyway to find the MSB and LSB from a given 14 bit value

steveholt · Post by **steveholt** » Mon Aug 22, 2005 9:52 pm

Yes, you got it.

The opposite is trickier. To get the MSB divide the 14 bit number number by 128 and throw away the remainder/fraction. That is if it is 259, MSB is 2 (not 2.023..). To get LSB, probably the least confusing is to multiply the MSB you got by 128 and subtract from the 14 bit number. That is 128 times 2 is 256. Subtracted from 259 is 3. MSB = 2, LSB = 3.

Steve

josevin2000 · Post by **josevin2000** » Tue Aug 23, 2005 11:04 am

Awesome....

Thanks a ton Dude!!!!

Sending PRG CHG Message as one 14 bit word !!!!