MilkyTracker & OpenModplug use the term "No Interpolation" for that ZOH you wrote there. That's the idea. And about "resampling" it's about the same. It's not just about old Hardware smplers, but about oldschool trackers: Impulse Tracker, Fast Tracker, Octamed... Most of them avoided interpolation to gain voices on old 386/486 machines, and the aliasing & lofi was part of that sound.Zero Order Hold = no math at all. Just take the value of the previous sample. Lots of Aliasing.
Linear interpolation = trivial math. Draw lines between samples and place the new samples on the line. Less aliasing, but still a lot.
Cubic interpolation = better math. Instead of lines between samples, draw curves. Even less aliasing, but still some.
Sinc = even better math. Still draw curves, but even better curves. Can get arbitrarily close to alias-free.
ZOH is. Indeed no modern DAC does it. But tracker software apparently does.
The fact is that Trackers are back in hardware format for some reasons. The sound is one.
https://www.youtube.com/watch?v=roBkg-iPrbw
Statistics: Posted by wikter — Sat Apr 13, 2024 11:42 pm