Xpantastic!

>On Wednesday, July 19, 2017 5:09 AM, "ipc.de@... [xpantastic]" <xpantastic@yahoogroups.com> wrote:
 >
>
     >I am sorry, but I forgot to add to my previous post that for checking the consistency of the six voices you will have to:
>(1) acitvate ALL six voices in the master menu (ON/OFF VOICES menu)
>(2) perform tuning routine
>(3) check, if still all six voices are ON (tuning routine might switch off an un-tuned voice, without the unexperienced user knowing)
>(4) set assignment (ZONE) to ROTATE
>(5) play the same note consecutively (six times in a row), 
>(6) repeat (5) for different settings and listen carefully.

>With ROTATE, each time the note is played by another voice. After six notes the same voice plays. So if you hear a different sound after six >notes, one voice is different from the >others. With a good ear you might spot even tiny differences between the voices. To locate the voice >number, look at the left most display. Each voice is represented by a dot.

>First try the clean waveforms of each OSC1 of each voice with open filter (4LP, Fc=127, Res= 0), then the same for OSC2. If all VCO waveforms >are consistent, go to the filter >settings, try different settings of Fc and of Res for each voice, try LP, HP and BP settings. If the six voices are >consistent in all these aspects, then most probably there is no problem >with the voices.

>Despite their high prices on the market and their essential function to the system, the CEM chips are not very prone to fail. 

>Much more prone to fail are CMOS chips. They are used to switch and mix waveforms and filter characteristics in the XPander voice (CMOS> 4016/4066, CMOS 4053). That's why I >recommend to test all waveforms and filter modes. 

>The are also used to distribute the CVs from the DAC to the voices, but the latter will probably be detected by the TUNING routine. If not, you >may find out by testing different Fc >and Res levels in all voices (see above)  
Hi All,      Jeremy,ipc.de,    This is all excellent advice! ^^^ I agree, The CEM chips are not prone to failure.
     I might add:Jeremy, what are your Master Transpose settings in the tune Page?  I have found it best to keep this at 0.  There is some interplay between Master transpose and the different keyboard tracking functions at the edges of the keyboard.  If I set master transpose to say-24  It changes the VCO tuning slightly, and the VCF tracking needs to be turned off, and a new mod ( KEY > VCF) needs to be created.The mod amount ( key tracking) then gets set about halfway. 
At least on my Matrix 12
           Posted by: ipc.de@...     
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