NeoGeo Sound: Linear Interpolation
One thing present in the real YM2610 and missing in emulators (as far as I know) is linear interpolation of samples. This is important because YM2610 had a variable sample rate channel which was used sometimes to play different notes using a single sample. Missing interpolation creates high frequency noise and aliasing. Are you going to notice it? The better your speaker system (and your musical ears) the most you will notice the difference.
The image has a comparison of the waveforms before and after interpolation and how this translates into a -10dB attenuation of high frequency content. This corresponds to this track, played through JT12.
Comments (7)
Me encantan estos posts técnicos. Muchas gracias por compartir todas estas interioridades de los cores y las posibles diferencias con los emuladores.
Do you have an audio demonstration of before/after?
I'll prepare one :-)
Very interesting to read.
This is really interesting, I'm loving all the updates.
I understand only half, hear less than a child due to the age, but for those interested in technology that is still very interesting to read!
Very cool :D