<p>I also think this is a good idea. Restricting it to the engine's name seems also good (less mess, and especially shows that the interest is especially on VOCALOIDs).</p><p>
</p><p>However, this should not be an open door to any abuses, and there is a way this can be achieved.</p><p>In each summary of the categories, we say these are songs featuring a certain singer (most of time VOCALOID), with the number of albums, since this is a common template. In the ones for the other synthesizers, it should be better if in the summary, we say these are songs featuring a vocal from a different synth engine (CeVIO, UTAU, Sharpkey, SynthV etc) BUT it also features AT LEAST one VOCALOID vocal in order to be accepted on the Wiki.</p><p>
</p><p>Otherwise I totally approve the idea.</p><p>
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