no one?
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Hi Alejander, I’m not using the device but resolution is probably the issue. CC generally has a maximum resolution of 128 possible values (0-127) and from the P6 manual, it looks like the parameters are all given values of 0-255 internally so I would estimate you’re jumping the equivalent of 2 intervals per “click”.
Unfortunately, the manual doesn’t provide any information about NRPN, but it might be possible to contact roland and casually ask if they have any NRPN implementation which they can share with you. I do see that the midi implementation chart provides a hexidecimal value which I assume is for use with sysex, so perhaps there is some unpublished NRPN information since NRPN would greatly increase the midi data resolution (if you can figure out how to send a NRPN data string from the UC4, don’t know if that’s possible).
I don’t know if that actually helps, but I don’t think you’re doing anything wrong, it just doesn’t have the same granularity of control via midi CC.
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I don’t have an UC4 but on my EC4 you can change the resolution. P6 uses a wider cc range than most synths, 256 instead of 128. I would think UC4 has a resolution setting as well. It does work properly with the EC4 set correctly.
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That sounds good too.
Wait, what?! How?? Unless they are using NRPN pairs (aka 14-bit messages with LSB and MSB), there’s no way to get more than 127 values from a MIDI CC message.
I looked at the P-6 MIDI docs and there’s no mention of this magic, it’s a list of standard CCs for all the granular parameters
Internal control can have a different value than what is possible via CC, internal engines are not MIDI per say, they are limited by the device’s programming and capability, it’s only midi (a language for communication between different pieces of dissimilar hardware/software) which has 128 values.
Look at the actual engine/parameter info provided in the manual which is not for midi, it shows 0-255 as the data range.
Might not even be all parameters, just some which have a greater range.
I’ll look into my midi controller further. It’s still 128 steps but the behavior of the encoder can change, meaning how fast turning the knob changes each step.
Thanks @PearTreeCraft. In fact I wrote it wrong, I have a Faderfox EC4. but, I can’t find where to change the resolution. Would you show me how to, if you have it setup correctly?
I imagine I need to change the display scale and the command type… Thanks!
I believe it is the ‘type’ setting. I’ll try to do some testing later tonight, I’m away from my gear right now. I could be wrong but I remember having this exact issue and somehow resolved it. I think I had the same issue with the SH4d also.
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Can you try is one please? The EC4 manual shows this is how to enable high res CC mode, I’m just guessing that this is what to do though so can’t confirm.
Looks like it’s under edit mode.
@alejander try ‘Mode’ setting ‘Div2’
It change my CC number, so if I change it, it is no more controlling the parameter desired.
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I’m trying that, but need to do some tests, cause I don’t see a lot of difference…
Just to confirm, you did this procedure of holding the blue function key and then press encoder 8 to enter edit mode, then you tried the other instruction about encoder 7/8 from above, and the result was that the CC number assigned to it changed? It did not show the parameter edit range for changing it to 000 to 031?
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@shigginpit Yes, I’m in the ‘Edit mode’. I want to control cc 23. Without changing other settings( I’m in Type:CCAb) the CC number changes from 23 till 127, so if I change it, it controls other things, but not the ‘GrainSize’ of the granular sample on the Roland P-6.
If I change the Type from CCAb to CCAh, the number of CC arrives at 31 and then stops. But in this CCAh type I need two CC commands, and I have no idea where to find those in the P-6 manual.
@PearTreeCraft I have the feeling that this ‘Div2’ is just changing the way the knob behaives when physically turned, but it doesn’t change the resolution, but maybe i’m wrong. I will wait till you are with your gear, and can tell me for sure. Thanks anyway for the help. We will arrive! Hope it serves also for other people! 
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I see what you’re saying. In the manual the grain size parameter is listed in a time-based value (secs) as opposed to any kind of standard resolution so perhaps it can only be controlled if you had the LSB number also. Maybe this has something to do with the need to edit on a per sample basis by holding down the shift button on the physical device, I don’t know.
For the faderfox it says the second value 32 to 63 follows automatically once you’ve set the 0 to 31 number, but perhaps this high cc resolution mode just is not the correct way to control grain size.
I’ll see what else I can find but it looks it may be necessary to contact Roland and ask if they can give you a hexadecimal for the nrpn MSB/LSB. I checked the hexadecimal listed next to the CC decimal in the P6 manual and it represents the same number of 23 so you’re correct, they aren’t really giving you the information you need.
If I can find something else online I’ll let you know.
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I think maybe you’ve already seen this chart, but you can try controlling P6 from an S1 since the knobs are already proven to correspond to P6 granular functions. I feel like it’s probably the same limited resolution as you’re currently getting with the faderfox, but you can make an attempt. Otherwise hopefully peartreecraft can find the steps to enable high resolution.
I’m sure these are already posted here somewhere but these are the charts and link I found:
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yeah, that is why I was asking about the S-1, in case anyone could check…unfortunately, I don’t have a Roland S-1…
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@alejander. Ok it seems I was wrong. You are correct there is something different about the granular engine parameters, for sure the grain size. This could be due to the granular being pre-mapped for control from the S1. The mode setting Div 2 on the EC4 does do what I was referring to but resolution is not the correct term… It just slows the behavior of the knob for more precise control. Seems strange it would be listed as a CC if it doesn’t respond properly. Maybe someone can test even with different midi controller.
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I love that form factor… shame that they cannot keep that design