Rather like the similarly-styled Avrocar, Yellow6 specialise in music that can only be appreciated late at night preferably without any disturbances. 'Overtone' works very well as a whole rather than on separate tracks as its trance-inducing effect gradually works its way through the listener's mind right down to the spinal column. Through its ambient soundscapes there are also snatches of dream-like guitar, a style mastered most effectively by Bark Psychosis a few years ago. It's fair to say that towards the end of 'Overtone', the hypnotic strength of the recording does tail off a little but when most of the music is based on repetition and loops than can only be expected. At its best ('Leitmotiv 3', 'Plastic Wheels' and 'Sugarland Tx') the music can be described as shimmering, gliding, graceful and elegant and it's no small achievement that over the course of 70 minutes it can very rarely be described as dull or boring.