Peter that's amazing thanks so much for posting. I would love to have a go on it should you ever have time to dig it out!!
On Sunday, 16 February 2020, Peter Carbines <sandalp...@blueyonder.co.uk> wrote: > On 16/02/2020 12:19, Augustine Leudar wrote: > >> I'm mainly interested in purely analog devices in this thread >> > > The small team I was involved in during the 1970s built a 4-input > proof-of-concept Ambisonic mixer. We were interested in developing a mixer > to produce B-format from multitrack recordings, creating an artificial > soundfield. > > It had 360-degree panning ability and radius-vector control on each. Two > input channels used sine-cosine 360 degree potentiometers derived from > scrapped electronics, probably radar consoles. Because we were unfunded and > basically running on 'pocket money', the budget didn't allow for 4 > sine-cosine pots so we designed and built two switchable pan-pots, > initially 30-degree but planned for an eventual 15 degrees. > > Switchable pan-pots consisted of an array of wafer switches with hordes of > 1% metal-film resistors. Not a build for the faint-hearted, and probably > not even attempted had we not made use of an early programmable > calculator!. 15-degree switches were under construction at the time the > whole project was abandoned. The chassis of the mixer still lies somewhere > in a heap of discarded electronics at the end of my garage! > > Despite its Heath-Robinson (or even Rowland Emett) appearance the mixer > did work and produced very interesting results. > > > _______________________________________________ > Sursound mailing list > Sursound@music.vt.edu > https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, > edit account or options, view archives and so on. > -- Artist website: www.augustineleudar.com Business website: www.magikdoor.net +44(0)7555784775 -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://mail.music.vt.edu/mailman/private/sursound/attachments/20200216/90f5ab65/attachment.html> _______________________________________________ Sursound mailing list Sursound@music.vt.edu https://mail.music.vt.edu/mailman/listinfo/sursound - unsubscribe here, edit account or options, view archives and so on.
