NOTE: The below Blu-ray captures were taken directly from the Blu-ray disc.

There are some very slight visual differences in the two Blu-rays but overall both are so similar it isn't worth mentioning. You can see the vertically stretched and lower resolution DVD image is easily bested. Both Blu-rays are 1080P with high bitrates and colors look excellent and there is grain texture support. Sweet.

In the audio Signal One Blu-ray go with a linear PCM in the original mono (24-bit) while Olive use a DTS-HD Master 2.0 channel (also 24-bit). The US may have a shade more depth and the UK marginally superior in the higher end. Both sounds excellent to me. The score contains music from Electric Flag including Peter's Trip, Joint Passing, Psyche Soap and many other songs fitting the groove of the film's vibes. Only the UK, Signal One, offers optional subtitles - English (SDH) and both are coded for their respective regions. 

The major difference lies in the supplements with Olive going their usual bare-bones only adding a trailer - and Signal One give us many of the extras from the Roger Corman DVD Collection (Reviewed HERE) from 2007. This includes the audio commentary with director Roger Corman, an original prologue and alternate ending - both with optional director commentary. Tune In, Trip Out is a 17-minute, 2003, documentary also from the old DVD set featuring interview with the cast and crew of The Trip. We get to hear Allen Daviau, ASC on Psychedelic Film Effects (2003) interviewed and see the 6-minute The Trip's effects montage well as a poster and stills gallery and the original theatrical trailer.

It's a pretty obvious if you are interested in the extras that the Signal One is the way to go but both offer impressive a/v Blu-ray transfers. An entertaining historical artefact showing the beautiful  Big Sur, California coast and some keen performances mediating on experimentation and expression.

 - Gary Tooze