RE: [chromapolaris] Are these caps good enough for the oscillator filters?
2019-07-12 by btmckee9@...
Thanks much Paul. I really appreciate it.
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RE: [chromapolaris] ADC Range Adjustment
2019-07-12 by Paul D. DeRocco
... You may have nudged a pin onto an oxidized spot. I d try completely pulling various chips and reseating them, so that you get some good wiping action as
RE: [chromapolaris] Are these caps good enough for the oscillator filters?
2019-07-12 by Paul D. DeRocco
... I d stick to polypropylene ones, at least for the 6.8nF caps, because they have lower equivalent series resistance and lower dielectric absorption,
Are these caps good enough for the oscillator filters?
2019-07-12 by btmckee9@...
https://www.digikey.com/product-detail/en/nichicon/QYX1H333JTP/493-3461-ND/2117750
RE: [chromapolaris] ADC Range Adjustment
2019-07-12 by sndgroom@...
Thanks Paul for the detailed instructions, really appreciate. I was going to do these tests, but before starting I tried to slightly tap the chips of the AD/DA
RE: [chromapolaris] ADC Range Adjustment
2019-07-06 by Paul D. DeRocco
... Yeah, it sounds like it s not the sliders. That s good, because everything else is easy to replace. It could be the ADC0804 converter, but as long as you
RE: [chromapolaris] ADC Range Adjustment
2019-07-06 by sndgroom@...
Thanks Paul, yes, I have a scope, thanks for the tip, I ll try that. Regarding the sliders behavior, it is erratic everywhere, pedal and levers included. The
RE: [chromapolaris] ADC Range Adjustment
2019-07-06 by Paul D. DeRocco
... It s hard to see noisy pots with a meter. The best way to see if the sliders are dirty is to put a scope probe on the wiper as you move it up and down in
RE: [chromapolaris] ADC Range Adjustment
2019-07-06 by sndgroom@...
After a careful cleaning of all sliders, nothing changed. What is strange is that measuring their values with a tester they look like working fine as variable
Re: Chroma Polaris Redo
2019-07-06 by sndgroom@...
... It happened to me too, I was so desperate that I ve been thinking of a MIDI problem and almost trying the cassette way, until I discovered it was MidiOx,
Re: Chroma Polaris Redo
2019-07-05 by deanomac5@...
So, working from the assumption that it might be a midi problem I rechecked everything and connected the CP to my controller. Didn t work at first but after
RE: [chromapolaris] Chroma Polaris Redo
2019-07-05 by deanomac5@...
Sorry, I misspoke. I did not send the file over sysex and MidiOX, it was via the .wav file, thus the reason for the sound.
RE: [chromapolaris] Chroma Polaris Redo
2019-07-05 by deanomac5@...
Thanks for the quick info on the channel/chip. I ll attempt that this weekend. Regarding the sysex, I was trying different things this morning and set the CP
RE: [chromapolaris] Chroma Polaris Redo
2019-07-05 by Paul D. DeRocco
... Since the chips are socketed, the easiest thing to do is to try swapping them, one at a time, between the bad channel and a good one, and hope the problem
Chroma Polaris Redo
2019-07-05 by deanomac5@...
Just finished putting new membrane panels on my original CP that I bought in 1984, WOW, it s back!, (thanks Paul). Honestly, changing those was pretty easy. 1.
Re: Membrane panels on eBay
2019-06-30 by deanomac5@...
Paul, I would like to purchase replacement membrane panels for my Chroma Polaris. Let me know how to make payment. Thanks, Ron McKinney 816-799-2234
RE: [chromapolaris] ADC Range Adjustment
2019-06-28 by sndgroom@...
Thanks for your advise, Paul. Even if in the flooding the synth hadn t direct contact with water, it took weeks until I went back home and realized what had
RE: [chromapolaris] ADC Range Adjustment
2019-06-28 by Paul D. DeRocco
... As long as the CPU is running, P3-1 is okay, it s just a logic level reset line. If the instrument got flooded, it s almost certain that the sliders are
ADC Range Adjustment
2019-06-28 by Max
Greetings to all, I m new to this group, thanks to the moderator for accepting me and to all for the help I m receiving already, by reading your old posts and
RE: [chromapolaris] Pedal for the polaris
2019-05-30 by karmakater@...
thanks for the detailed and insightful clarification, paul. there seems to be only the original pedal that can do 0 - 100k or i m tinkering with your
RE: [chromapolaris] Pedal for the polaris
2019-05-28 by Paul D. DeRocco
... From what I gather online, the EX-P has a 65K pot and a stereo TRS (tip-ring-sleeve) plug, where the tip-to-ring resistance goes from about 10K down to
Re: Pedal for the polaris
2019-05-28 by karmakater@...
hm, no one uses a pedal? what a pitty..
Pedal for the polaris
2019-05-26 by karmakater@...
Hit there, does anyone know which of the currently available pedals is best for the polaris? i have an M-Audio EX-P which has a rather small effective radius,
Re: Factory Presets as a .wav or .mp3
2019-05-19 by steve_synthmagic@...
Thanks I ll give them a try. Cheers
Re: [chromapolaris] Re: Factory Presets as a .wav or .mp3
2019-05-19 by Chris Ryan
As the contributor, David Clarke, wrote, they’re Volume 1 Chroma Polaris Voice Programs and Chroma Polaris Sequences from the Chroma Polaris Vol. 1’
Re: Factory Presets as a .wav or .mp3
2019-05-19 by steve_synthmagic@...
Thanks. Are they the Factory Presets? I was under the impression they are presets created by someone on the site. Cheers
Re: [chromapolaris] Re: Factory Presets as a .wav or .mp3
2019-05-19 by rez
Maybe this will help: Rhodes Chroma · Polaris Patches & Sequences ... Rhodes Chroma · Polaris Patches & Sequences Chris Ryan ... On Sunday, May 19, 2019,
RE: [chromapolaris] Factory Presets as a .wav or .mp3
2019-05-19 by Paul D. DeRocco
... If someone creates this file, the .mp3 format shouldn t be used, because it doesn t necessarily preserve the waveshape, just the harmonic structure. Use
Re: Factory Presets as a .wav or .mp3
2019-05-19 by steve_synthmagic@...
Thanks for the reply. It s still on there, but he wants £51 plus £40 to ship plus import duties and there is no mention as to if the tape still works. I only
Re: [chromapolaris] Factory Presets as a .wav or .mp3
2019-05-19 by rez
Check eBay! I seen a cassette or two about a week ago. Might still be for sale. Peace On Sunday, May 19, 2019, 8:46:30 AM CDT, steve_synthmagic@yahoo.co.uk
Factory Presets as a .wav or .mp3
2019-05-19 by steve_synthmagic@...
Hi, does anyone have a .mp3 or .wav of the original Factor presets cassette tape? I have searched everywhere, but cannot find it. Thanks
RE: [chromapolaris] Re: Tuning Issues
2019-04-24 by Paul D. DeRocco
... When you select a sound, the parameter sliders (and switches) are temporarily overridden until you move or press them. If you don t hear the sound, that s
Re: Tuning Issues
2019-04-24 by btmckee9@...
No, that s not normal. So you re saying that you don t hear anything with the pulse width sliders in the middle? Do you only hear something on one side, but
RE: [chromapolaris] Tuning Issues
2019-04-23 by Paul D. DeRocco
... I think airborn contaminants like vaporized cooking oils can cause problems, and you can t really see them, except that they may also attract dust. Alcohol
RE: [chromapolaris] Tuning Issues
2019-04-23 by btmckee9@...
Thanks Paul. I didn t think of contamination. It s interesting that the channels that are the worst are the ones on the ends, where contamination might be more
RE: [chromapolaris] Tuning Issues
2019-04-23 by Paul D. DeRocco
... 21 cents is definitely bad. Even 8 sounds like there s something slightly wrong. You don t have to replace all the caps in the sample-and-hold circuits,
Re: [chromapolaris] Tuning Issues
2019-04-22 by btmckee9@...
Here is some more information. First off, I quoted semitones in the previous post, those were actually cents. Learning all the time. The behavior changes
Re: [chromapolaris] Tuning Issues
2019-04-22 by btmckee9@...
Thanks for replying. I found the possible bad components on the schematics. I do believe all these components are socketed. One problem we had with dip sockets
Re: [chromapolaris] Tuning Issues
2019-04-22 by Bob Grieb
What you are describing sounds like it could be issues with the CD4051B s used to demux the DAC for the sample and hold circuits. That would be Z101,102,
Re: [chromapolaris] Tuning Issues
2019-04-22 by sonicalliance@...
Hello Bob, Thank you for your reply. We attempted to tune the channels independently of each other. Tuning them one at a time does a lot better job, but
Re: [chromapolaris] Tuning Issues
2019-04-22 by Bob Grieb
The frequency determining caps for each voice are often low drift types, such as polystyrene or silver mica. If you replace them with std mylar (polyester)
Re: [chromapolaris] Tuning Issues
2019-04-22 by Gregory Cox
Try cleaning all the connectors from the voiceboard. Worked for me as per Paul DeRocco’s advice. And then the obvious, perform an autotune. I wouldn’t
Tuning Issues
2019-04-22 by sonicalliance@...
Hello, my friend and I are working on my Chroma Polaris. We have been experiencing tuning issues. We replaced all the capacitors on the power supply. We also
RE: [chromapolaris] polaris out of tune
2019-04-16 by wasteking1@...
sorry to be so lame---but you had it with #5-- I didn t realize I had somehow changed the master tuning--- I haven t ever changed it before-- but it played
RE: [chromapolaris] polaris out of tune
2019-04-15 by Paul D. DeRocco
... The possible explanations I can think of are: 1) The crystal oscillator from which all timing is derived is off, and the crystal or perhaps even the CPU
polaris out of tune
2019-04-15 by wasteking1@...
it seems my Polaris is running about a quarter tone flat ---despite the tune all function. Is there some way to recalibrate? maybe some trip pot inside?
RE: [chromapolaris] schematics
2019-03-22 by karmakater@...
thanks for clearing out Paul, i found another tech who is fine with the schematics.
RE: [chromapolaris] schematics
2019-03-21 by Paul D. DeRocco
... The schematics in the service manual should be all you need. The only significant thing that I know is missing is that there was a change in the design in
schematics
2019-03-21 by karmakater@...
my polaris have to be fixed (no audio) and the technican wants a complete schematic, he knows the schematics in the service manual but he wants the complete
Re: Chroma Polaris Vs. Chroma Polaris II
2019-03-19 by rob.ocelot@...
Yes, I believe the II uses the late revision power supply. There s also early and late revisions of the main board and from what I can gather it accommodates a