If you get bored with no questions for a few days perhaps you could answer them in advance,
Seriously after 12 years in the UK RAF, I started with the Digital PDP8 with 4Kb magnetic core memory using machine code (can't get much in that). The first program I wrote was NIM, keying in the binary code with the front panel key switches. No screens or keyboards then just a teletype for input/output. Then the first Microprocessor the intel 8008 (not 8080) in 1971-ish, then 6502 etc using machine code eventually moving up to assembler. Most of this at the same time as building and designing the hardware.
I will have a look at your link after the weekend when I stop thinking.
My first visualiser was a hardware one back in about 197x or 198x. It was built into a large wooden frame with coloured 12v bulbs behind cottonwool and other materials, thyristors and filters on 4 channels. Totally different to today's. The filters were extremely accurate at isolating frequencies, hence the title of my post and trying to resurrect the same or similar so that the mid tones didn't light the other colours too much. With MD2 they do overlap a lot spoiling the effect.
Back to thinking for now. Meanwhile perhaps some background from your end.