8BitSound – Make Everything Sound Retro

8BitSound is a sound filter mod for R.E.P.O. that makes all in-game audio sound like it's coming from an SNES cartridge.

It dynamically adds a runtime DSP bitcrusher to every sound played in the game using a Harmony patch. No asset bundles, no Unity editor. Pure code.

🎧 What It Does

• Simulates 8-bit / SNES / 16-bit console audio
• Reduces sound fidelity via custom DSP:
  • Lower sample rate
  • Reduced bit depth
  • Replaces Unity’s environmental audio effects

🔍 How It Works

• Patches Sound.Play() using Harmony
• Adds a BitcrusherFilter component to each new sound
• This filter modifies the audio buffer in OnAudioFilterRead()
• Customizable bitDepth and sampleRateReduction (hardcoded to SNES-like 4-bit @ 8kHz)

🖥️ How to Use

Just install it – it runs automatically on all sounds.

Note: The main menu button sounds are very quiet or muted as a side effect of how they are spatially set up. This is expected.

• Level transitions etc have no sound - This mod applies inside of the level.

🎮 Compatibility

• Works in singleplayer and multiplayer
• Compatible with other mods unless they heavily override Sound.Play()

⚙️ Technical

• No Unity assets or mixer groups required
• Written entirely in C# with BepInEx + Harmony
• Fully runtime, attaches to existing AudioSource objects
• Injects real-time DSP using OnAudioFilterRead

🛠️ Credits

Created by OmniScye
SNES-fy your REPO runs. Chiptune chaos awaits.