very slight aliasing / artifacting on sine oscillators

[~Pd~]

Hi,

On sine and triangle waveforms (possibly any waveform) with the "tone" turned down (smoothing the waveform) there are differences from one note to the next even in the middle C range that sound like aliasing or artifacting. It's less obvious when turning up the quality but is still there. Even a sine right on middle C has these spikes between 6 and 7 kHz that are obvious when the volume is turned up:



This is a little annoying, because I'd like a really clean sine wave for certain patches and effects.

Using Synthmaster 2.6.19, Reaper 4.721, OS X 10.9.4

[~Pd~]

I should add that I'm being super picky here and the kind of thing I'm describing wouldn't be audible in 99.999% of Synthmaster patches, so people shouldn't jump on this and say "oh, Synthmaster aliases"