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I wrote the original source code of my now published program in 1986. I recently found it in one of the old spiral notebooks. I typed it but it didn’t work because it has a lot of errors. Unfortunately, I could only find this assembly source, no hex code or BASIC loader anywhere. Maybe I have it on one of my tapes or another notebook. Anyway, I fixed it. Despite his poor, 1-bit mono skills, it was a miracle at the time.

A few years later, I designed and built a 2-bit audio digitizer for the C64. Its sound has become more beautiful, due to the double bit depth, i.e. more detailed sampling. I used it for several demos. I even wrote a sampler based DAW that was similar to the Amiga sampe method, only on 1 channel. Then I also built a 4-bit device (shown below), but it was only tested, nothing was made with it for a demo/game. However, 4 bit already resulted in much more detailed sampling, and thus the result was much clearer and more beautiful. But “the hand of fate” brought me an Amiga, and I built an 8-bit digitizer for it.

Digital signal processing (DSP) or digitization is the process of making a physical quantity processable in some way for a computer.”

This means that the sound, which we have already converted into an analog electronic signal, still needs to be converted into a form that the computer can process. Nowadays, this is done by sound cards, but back then they didn’t exist, and most microcomputers only had chips capable of synthesizing sound.”

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