Hi,
Perhaps this information can help.
In this video
https://www.youtube.com/watch?v=qpL1IokHH5Y i can see Bowie playing a Chamberlain. It's like a Mellotron but older. I would assume you can use Mellotron.
I also see a ARP Odyssee, that may have been used on the Low album version - or another ARP may have been used. You can try ARP 2600 V.
Then i see a Roland Jupiter 4, but i'm not sure, if that can have been used on the Low album, as it first arrived in the stores in 1978 where the concert is played, and the studio album is from 1977.
Then i see an organ. Not sure which model. Also another keyboard that i can't tell what is. But perhaps a string ensemble have been used if it's not organ sound. Arturia have Solina V, Farfisa V, and perhaps Vox Continental V, that can be of use.
Eno used EMS synths too. I can't tell, if that was used on the Low album.
Yamaha DX7 first arrived in 1983, so that's not on the album Low.
Yamaha CS80 was produced in 1977 but not in the stores in 1976 where low was recorded. Eno have used it i believe, so it perhaps can have been used on Low.
And effects was used on low.
If you find a old Low Vinyl record, then you perhaps can read more detailed informations on the cover.
EDIT: Perhaps a Minimoog was used. EDIT END.
