开云体育

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)