Help! LSB MSB issues|

[jmarco]

No idea how to insert this? What does offset means? How to use it?
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Sorry o ideia.
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Is there a edit mode that a command is needed? or a sysex msg?
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For example how to implement the fine tune the number four in the list? I’m trying, but without a clue.
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Thanks a lot in advance.
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João Marco

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[dnaldoog]

For RPN, see attached image.

This is for Coarse tuning. Fine tuning is exactly the same except substitute a 1 for the 2 in MIDI Controller Number.

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[jmarco]

Wow!
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Ok, ok! That was amazing!!
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Please, take some time and explain it to me, I you can!
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MIDI controler Number 1

CC,ByteValue,MSB7bitValue,101,-2
CC,ByteValue,LSB7bitValue,100,-2
CC,Default, Default, 6,-1
CC,ByteValue,MSB7bitValue,101,16384
CC,ByteValue,LSB7bitValue,100,127

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I really want to learn this thing!
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Ctrlr is really buggy, or it’s just my system?
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Thanks in advance!
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João Marco

[dnaldoog]

Actually, I can’t really explain it João. I would have copied it off another panel or from the forum somewhere,

To use CC#6 as a 7bit number for the Yamaha I used (or copied)
CC,Direct,Direct,6,-1

but you can create a template message (there’s one there for KORG NRPN) that is interesting.

CC,ByteValue,MSB7bitValue,99,-2:
CC,ByteValue,LSB7bitValue,98,-2:
CC,ByteValue,LSB7bitValue,6,-1

It looks like Korg uses CC#6 for LSB, but it’s usually used for MSB as I understand it.

Just click on the ‘document with arrow’ logo to get started creating messages in the window ‘Multi Message List’.

A standard RPN message template

CC,ByteValue,MSB7bitValue,101,-2:
CC,ByteValue,LSB7bitValue,100,-2:
CC,ByteValue,MSB7bitValue,6,-1:
CC,ByteValue,LSB7bitValue,38,-1

You can see the RPN above is really four messages:
The MSB CC 6 will send 1 for a value of 128 and 0 for a value of 127
The LSB CC 38 will send 0 for a value of 128 and 7F for a value of 127

The MIDI controller number is sent with the RPN LSB and then the actual value is sent using CC #6 and/or #38 for some parameters like pitch bend. Sometimes #38 is omitted.

The last two messages are optional I believe and close off the message, setting it to NULL otherwise problems can arise. In fact I tried using NRPN for the Yamaha PLG150AN panel I wrote, but it did weird things to the board, so I just used RPN,sysex and CC.

Here is a sample midi message:

[23:05:40:000513]: RAW:[b0 65 00] = 101
[23:05:40:000513]: RAW:[b0 64 02] = 100 / coarse tuning
[23:05:40:000513]: RAW:[b0 06 02] = value
[23:05:40:000513]: RAW:[b0 65 7f] = NULL the message
[23:05:40:000513]: RAW:[b0 64 7f] = NULL the message

so a single NRPN could be up to 6 consecutive midi messages!

[jmarco]

Thanks for this! It give me another perpective about it!
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But why the negative numbers?
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What is the relation with the “MIDI controler Number 1” in the dialog box above?
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Sorry about my lack of MIDI smartness. 🙂

[dnaldoog]

Hi João,

No idea why it’s like that, but I found if you replace a -1 with a number, it sends that as a fixed value, so -1 must mean use the ctrlr modulatorValue(), it looks like direct,direct means just send the modulatorValue().
Not sure about -2.

CC,Direct,Direct,9,8

I tried this message and it sends

b0 09 08

[jmarco]

Thanks. I’ll run some testes to put my mind into place! 🙂
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João Marco

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