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Yamaha DX7 with Grey Matter E! Expansion Project Machine

“This synth was tested and working perfectly, but then was shipped and now there is a buzzing tone playing over all the patches. The buzz changes in timbre when you change patch, and settings but is present regardless of patch. It might be a problem with one of the voices, but I can not say for sure, and am about to move across the country, so I do not have time to fix. It is now being sold for parts/repair. ” Click here to search for synths on eBay