I don’t own a Nebulae v2 and can’t really speak to what’s happening, but is it possible that these outcomes are intentional for the Nebulae to act as a granular experimentation tool rather than as a straight-up looper (with some trade-offs implied)? Some sections of Make Noise’s Phonogene manual might be relevant in that case:
PERPECTIVE
There is often the expectation that “bad sounds,” such as clicks, pops, distortions, wrong notes, phase inaccuracies and otherwise, should be impossible with modern musical instruments. Many designers are making instruments which are fool-proof, and which guarantee some specific musical result, thus making it easy to create the same music over and over again. The PHONOGENE does not use this approach. In fact, we have made it very possible to make the “bad sounds” and “mistakes” that have led to some of the greatest moments in musical history (and of course, some of the worst!). With the PHONOGENE, it is possible to Splice sounds in such a way that you hear sharp contrasts, clicks and pops. This is the physics of sound! It is possible to slow down a recording to the point of complete decimation, so that all that remains is trail of digital artifacts. Such are the limitations of digital sound. It is possible to render the source material completely unintelligible, to cut busted loops, to distort digitally, to obscure, to regenerate to the point of almost no signal integrity. This is the nature of the PHONOGENE. If you seek the perfect looping tool, in the most contemporary sense of the word “loop,” then please look elsewhere. If you desire to explore the realm of modular, digital sample manipulation and microsound, read on!
Signal OUT
That the PHONOGENE exists within the modular system is a huge advantage. Many Analog Synthesis techniques and processes work well with the PHONOGENE. Creative Filtering, especially Low Pass and Band Pass, are very useful in controlling the textures, clicks, and aliasing of the PHONOGENE. Amplitude Modulation, Echo, Reverb are also commonly suggested post processing techniques in microsound and granular synthesis.