I collected as many Yamaha DX7 patch files as I could and deduplicated each voice within each patch file. There were 59,907 SYSEX files, most of which contained a bank of 32 voices each, for a total of 1,853,728 voice sounds. After hashing the non-name content of the voice (the actual parameters of the sound), I found 31,380 unique voices made by musicians over the years for the DX7.
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