nesdev.org

After Optimization !!!!


https://dl.dropbox.com/u/30815442/downl ... imized.mp3


Now I am very happy with the result after tuneup. Thank you very much for all comment !!!!!

It's hard to tell with the material you're using. What's obvious though, is that there's some other problem in your emulation not related to aliasing. The music sounds choppy (almost seems like timing is off, but could be just wrong note lengths or something playing with my ears). It is realtime pa...

It's hard to tell with the material you're using. Can you do a simple mono frequency sweep from 100 Hz to 30000 Hz, lasting say 20 seconds? If you have a program to show the frequency spectrum, aliasing is really easy to spot (I've moved to Linux and am not familiar yet with one to do this). Try th...

Now with luck, I am able to integrate bandlimited to wave form generation.

Here is the result.
https://dl.dropbox.com/u/30815442/downl ... 08-0_3.mp3
and
https://dl.dropbox.com/u/30815442/downl ... -solid.mp3

May I ask for your opinion ?

Fortunately it seems most NES emus solved this issue, but most GB/GBC/GBA emus does not. Even VBA which is the most popular GB/GBC/GBA have aliasing in it's sound. The NES output path has natural antialiasing, with a low-pass filter in the RF box. GBA and DS, on the other hand, use a PWM DAC at aro...

Why use something like blipbuf? Because otherwise the sound has a scratchy quality (due to aliasing) which pollutes the crystal-clear sound of the NES. This was evident in the recording you posted. I just wanted to bring it to your attention. Are there any proof of audible alias which generate by s...

Why use something like blipbuf? Because otherwise the sound has a scratchy quality (due to aliasing) which pollutes the crystal-clear sound of the NES. This was evident in the recording you posted. I just wanted to bring it to your attention. Are there any proof of audible alias which generate by s...

BLEP (band-limited step) resampling, the technique used by blip-buf, is a way to eliminate aliasing from a signal when downsampling from the 1.79 MHz CPU frequency to 44100 or 48000 or whatever target frequency. It works by decomposing a signal into a sum of Heaviside steps , low-pass filtering a s...

May i ask why blipbuf ?

Hello!! I would like to introduce "Peace Synthesizer Framework" It support NES/Famicom sound emulation with customizable Visualization and DSP #Demo Vampire Killer - Castlevania #NES Stereolization process in "Peace Audio Synthesizer" http://www.youtube.com/watch?v=1YqyFx5VKf4 Th...