Rhodes Chroma Polaris

Hello all,
I found this webpage. Its got a good list of CP commands for anyone without a manual.

http://machines.hyperreal.org/manufacturers/Chroma/Chroma-Polaris/info/

Can anyone help me out with assigning the slider controls to midi. I want to be able to
move all the sliders on my CP so that I can control other midi devices.

Thanks,
Marco

> I found this webpage. Its got a good list of CP commands for anyone without a

manual.

>
> http://machines.hyperreal.org/manufacturers/Chroma/Chroma-Polaris/info/
>
> Can anyone help me out with assigning the slider controls to midi. I want to

be able to

> move all the sliders on my CP so that I can control other midi devices.

Marco - the sliders are already assigned to Midi Continuous Controllers. The
specific mapping (and additional details) are available in the MIDI
Implementation Manual (available from the Polaris section of
www.rhodeschroma.com).

The data is also available at the site you noted, in:

http://machines.hyperreal.org/manufacturers/Chroma/Chroma-Polaris/info/Chroma-P
olaris.MIDI-CC.txt

(Hey! There's a post in there from me, 10 years ago!)

Hi all,

Just a question. Is it possible to enable midi dump for your Polaris?
I'm not sure because I've come across this description about the Polaris
commands refering that Lw C 12 would enable midi dumps.
(http://machines.hyperreal.org/manufacturers/Rhodes/Chroma-Polaris/info/
chroma.Polaris.User.Inferface.Commands.txt)
But that function doesn't work for me.
I just wanted to save those patches I've downloaded from the chroma site
to a digital format since these are in audio format and don't load 100%.

Fuse
----------------------------------------
http://www.digitaloperationtheater.com

> Just a question. Is it possible to enable midi dump for your Polaris?
> I'm not sure because I've come across this description about the Polaris
> commands refering that Lw C 12 would enable midi dumps.

LF C 12 should indeed do a program dump. It will only dump 1 program - the
current one (i.e., the "main workspace").

This sort of thing should allow you to get the patches in sysex format - but
you will need to select (and then dump) each patch individually.

I can confirm that this functionality should certainly be present in Rev 9
software (you can check the installed software version by pressing "LF D 2")

======================

On the technical side, the LF C12 will output a SysEx message like:

F0 08 01 4F 30 30 38 35 30 31 F0
F0 08 01 57 32 43 30 30 30 30 43
30 30 30 31 39 30 30 33 30 32 38
30 30 46 30 37 42 41 34 30 39 30
38 33 35 31 32 30 33 30 30 32 46
30 30 30 37 32 43 30 30 30 30 44
38 30 33 30 30 46 43 30 30 30 30
30 30 30 30 30 30 30 30 30 30 30
30 30 30 30 30 30 30 30 30 30 30
30 30 30 37 30 30 30 31 31 38 F0
F0 08 01 53 31 45 30 30 37 46 30
30 F7

Per the MIDI implementation doc, F0 08 01 is the sysex prefix (F0 = start of
sysex, 08 = Fender ID, the 01 = the channel number).

Polaris sysex is funny - as everything is encoded in ASCII.

The first byte after the F0 08 01 is the packet type (0x4F = ASCII "O", for the
"Open" opcode).

Open takes the format Onnnnmm where "nnnn" is the object number and "mm" is the
mode.

In this example, nnnn = 0x30 0x30 0x30 0x38 0x35 - which when converted to
ASCII is 0085. mm = 0x30 0x31 = 01 = "write-enabled.

Object 0085 (again, per the MIDI doc) is the Main Instrument object.

We've then got another sysex start, with opcode 0x57 = ASCII "W" = the "Write"
opcode.

The next bytes encode the number of bytes and the starting address:

32 43 30 30 30 30 => 2C 0000 = 44 bytes, starting at object address 0x0. The
next 44 bytes are then used as data.

The last sysex is F0 08 01 53. 0x53 -> ASCII "S" = send message.

Decoded:
31 45 => 0x1E = stream number
30 30 => 0x00 = instrument number
37 46 => 0x7F = message
30 30 => 0x00 = operand

Stream number 0x1E is the "instrument" stream. Message + Operand 0x7F 0x00 =
"Recreate Instrument"