Nrpn messages?

[PongFu]

Is it possible to send nrpn messages to a dsi tetra and if so, how?

[kraftf]

One way is described here

http://liine.net/forum/viewtopic.php?f=25&t=600

[PongFu]

So turning the LFO 4 Frequency knob gives this message in MIDI-OX,

lfo 4 freq.JPG (20.47 KiB) Viewed 7678 times

now what?

[kraftf]

It depends on what kind of NRPN message you want to send. Use the 14bit as your method and change the MSB-LSB values and whatever you like to achieve your NRPN.

[PongFu]

I just want to know how to make a fader control the LFO 4 frequency from 00 to 16,
and the make a few buttons for the specific synchronized LFO values;
17,18, 19, 1A, 1B, 1C, 1D, 1E, 1F, 20, 21, 22, 23, 24, 25 and 26
So what are the different kinds of messages I can choose from,
what's the difference between them, and do I use cc's? a script? a custom midi message?

[Macciza]

Hi
Based loosely on the other script - This one sends NRPNs - only MSB data atm . . .

Add it as a script to a Fader . . .

// NRPN script - MM

decl target=0; // MIDI Target
decl nrpn_msb = 99, nrpn_lsb = 98; // NRPN MSB - LSB
decl data_msb = 6, data_lsb = 38; // DATA MSB - LSB
decl nrpn_param = 52;
decl null=0, value; // Vars
decl chan = 1; // MIDI Chan

value= Fader.x*16; // value * range

ctlout(target,nrpn_msb,null,chan);
ctlout(target,nrpn_lsb,nrpn_param,chan);
ctlout(target,data_msb,null,chan);
ctlout(target,data_lsb,value,chan);

Only LSB data is sent as per your pic MSB=0 so you may need to check what range you want to send and adjust to suit,
usually the MSB would be used and LSB could be left off - you will need to check the synth's sysex ref . . .

Hope that help in some way - there are no doubt other ways to achieve the same thing

Cheers
MM

#PS Just wanted to add that this is just one way to do and by no means the best way particularly in a larger app . . .

[PongFu]

I'm still not getting it, what number goes where and why?

[Macciza]

Hi
Try a net search on NRPN they are particular CCs sent in a particular order . .

Reading your pic - B0 means CC on channel 1
CC 99 and 98 (63 and 62 hex)are MSB and LSB for the NRPN number - 0 and 52 (thats 34 hex ib decimal) are sent
CC6 and 38 are used for the data part to send your values

Hope that helps
MM

[PongFu]

I still can't get it to work, do you happen to have a DSI tetra somewhere?

[Macciza]

Hi PongFu
No Don't have a Tetra - but I had a quick look at the manual - check the nrpn info and tables at the end . . .
We can using running status which means we don't have to retransmit some redundant info.
So you just need to send the info it details - convert the binary to hex or decimal as you wish . ..
It helps to use a calculator that can do the decimal, hex, binary conversion for you
Check you are setup to send and recieve nrpns in global parameters
Then go through the Program Parameter table . .
LFO 4 Freq is param 57 which is for layer A is nrpn 52 and takes 0 -166 as values same as LFO 1
0-166 = 0 - 150 unsynced frequencies then 151 to 166 are the synced divisions . . .
Have a look at what values are being sent when you twist the knob - you need to mimic that range . .

So it's probably better to use midiout and send the data described

ie something like - midiout(0{0xB0,99,0,98,52,6,val_msb,38,val_lsb})
So it just comes down to how you want your interface to work and how to map the values properly

Once you have selected an nrpn you can use the value increment/decrement messages as well
Also remember to use the reset message - looks like its 37 & 36 with 127 as the data

Hope that makes sense
Cheers
MM