29 Jan
2017
29 Jan
'17
10:17 a.m.
On Sun, 29 Jan 2017 02:41:50 -0500
termtech <termtech(a)rogers.com> wrote:
On Saturday, January 28, 2017 2:37:40 PM EST Len Ovens
wrote:
It seems to play safe and always send Nhigh, Nlow, Dhigh, Dlow although I
haven't investigated all the settings. I'm a bit lazy. Once I've got what I
want I tend to lose interest and stop investigating.
On Sat, 28 Jan 2017, Will Godfrey wrote:
I am interested to know /how/ it sends out the 14 bits.
Hi byte first? Or low byte? Or selectable?
And can it optimize by not sending redundant hi or low bytes,
or redundant NRPN numbers? My nice new BFC2000 was delivered yesterday, and
I'm very pleased with it.
It has an astonishing range of configuration possibilites, and unlike
many units is reasonably quick and easy to program from the unit itself.
Good to know.
The faders can be ordinary CCs, specifically
pitch bend or any NRPN. The
NRPNs can be full 14 bit data or 7 bit and can be absolute or
incremental.
I knew the encoders could be incremental, but faders is a new one
on me.
I can't confirm the resolution of either the
pitch bend or NRPN modes, but
it is greater than the accuracy of the sliders themselves - when used as
an NRPN and steadily moving the slider up, a fractional movement can
actually send a slightly lower value - which suggests it's reading
discontinuites in the carbon track.
That could very well be why Mackie limited their faders to 10 bits (last 4
bits zeroed). Possibly the problem Will is seeing is a
'glitch' upon the discontinuity
when the hi byte increments to a new value and the low byte
'rolls over' to a new value.
Nope, I was logging the values. I'm talking about extremely small values here.
Dlow 33 then 27 then 33 again comes to mind. Seeing odd number values caught my
attention.
What are you feeding it into?
cout << "Control " << int(ctrl) << " Value "
<< int(val) << endl;
:¬)
I question whether such a new professional product
would have
touchy carbon like that, where it goes 'backward' slightly in spots.
(If it uses carbon at all.)
It's posible I was actually seeing mechanical backlash as I was making *very*
slow, tiny movements. Bear in mind that full range is 100mm.
100 / 16383 * (33-27) = 0.037mm
Now if you'll excuse me, my next task is to work out how to MIDI-learn NRPNs
(already got 14 bit pitch bend done) :p
--
Will J Godfrey
http://www.musically.me.uk
Say you have a poem and I have a tune.
Exchange them and we can both have a poem, a tune, and a song.