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Another Ultrabox project. This time NES style instruments with 2a04 and VRC5!

You also can import samples (since ultrabox lets you import samples)

Watch this tutorial:

 

DPCM Method (I got it from Copilot btw)

1. Start with a Source Sound

  • Pick a short sample (kick, snare, voice, or effect).
  • Keep it under 1 second for authenticity.

2. Reduce Bit Depth

  • Use an audio editor (Audacity, OpenMPT, or a DAW plugin).
  • Convert to 8‑bit or 4‑bit PCM — this simulates the NES’s limited resolution.

3. Lower Sample Rate

  • Resample to ~8 kHz or lower.
  • NES DPCM often ran at ~4 kHz, so aim for that if you want maximum crunch.

4. Add Aliasing & Noise

  • Disable anti‑aliasing filters when downsampling.
  • Optionally add a bit of white noise to mimic the NES’s playback distortion.

5. Export in a Usable Format

  • Save as WAV/OGG/MP3 depending on your tool (UltraBox accepts these).
  • Keep mono, small file size (<5 MB)

 Quick “Fake DPCM” Tricks

(Again, got this from copilot)

  • Bitcrusher plugin: Set depth to 4–8 bits, sample rate to 4–11 kHz.
  • Downsample in Audacity: “Tracks → Resample” → choose 4000 Hz.
  • Clip the waveform: Hard‑limit peaks to mimic NES’s harsh playback.

And that's it enjoy :)))))))))

Download

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Click download now to get access to the following files:

2A04 INSTRUMENTS (1).json 5.4 kB
VRC5 INSTRUMENTS.json 10 kB

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