Tether as in ‘the end of one's’ or as in a rope that anchors a moving object to a fixed reference point? Probably the latter, though the sound the quartet make is antic enough in places to suggest the former. The sort of elasticated improv band leader Hayden Prosser and co go in for relies on a kind of collective imaginary tether to draw them back to a shared reference point once in a while. They achieve this falling-apart cohesion successfully across this intriguing set of 11 tracks, which for the most part involves alternating long and short cuts: moody eight-minute opener ‘Undo’ gives way to the jittery, crystalline 57-second ‘Glas’, which then introduces ‘All’, which is sprung on Prosser's experimental dabblings with electronics. And so it continues, although the meaty ‘Season’ and ‘Out of This’ break the sequence by being placed back to back. The overall feel can be summed up as the three f's: fragmentary, fluctuating and not without moments of foreboding – a classic Berlin recording, in other words.