Well, so the duty thing would be pretty much like in modern pulse-interleaving engines.
I assume there must be a connection between this and the Cybernoid series. Netherworld, too, and Turbo Boat Simulator.
https://spectrumcomputing.co.uk/index.p … mp;id=5456
I'm assuming Dave Rogers wrote the beeper music for all of these (Nick Jones always used Wham for beeper). I think the engine must be his as well, because Turbo Boat Simulator is not a Hewson Title and none of the other usual suspects were involved in this. Also I wonder if it's always the same engine or if there's some evolution from Cybernoid -> Cybernoid II -> Netherworld/Stormlord.
Edit: Wow, forgot how insane that Netherworld music was. Easily one of the top monophonic beeper titles.
Sadly it seems Dave Rogers didn't have much love for the beeper, actually:
4: How was it working with the single channel Spectrum Beeper?
What can I say? Incredibly limiting would be an understatement. I always did the best I could with the 128k sound, trying to overcome it's limitations, but the beeper just felt like a waste of effort. The only time I did anything specifically for the beeper was for Cybernoid - a three channel tune for the 128k and a completely different one for the 48k.
The rest of the time I took the lazy way out and just squashed the three channel AY-chip data down into one channel for the beeper.
http://zxspectrumgames.blogspot.com/201 … rview.html