This is not quite the perfect forum for this, but as I was reading yet another pipe-dream diy digital decoder thread, I was reminded of analog multichannel decoders. Sure, there were many that were associated with vinyl source, although I was thinking more of the batch of cheap analog decoders that sprouted up during the early days of Dolby when a digital processor was $$$. Did anything become of these? Were there any attempts at high end multichannel audio with decoders that process in the analog domain? Did these just die off?