Euphonium: Sound Blaster Pro Edition

Euphonium: Sound Blaster Pro Edition

*A resourcepack that transforms Euphonium’s ambient sounds into an authentic MS-DOS Sound Blaster experience.*

🔉 Why This Exists

Modern audio is too clean! This pack downgrades 8-bit, 22.05 kHz’s sounds to 8-bit, 22.05 kHz with analog imperfections, mimicking the gritty, warm noise of a 1992 Sound Blaster Pro (1.0). Perfect for retro-styled modpacks or DOS gaming nostalgia.

🎛️ Technical Deep Dive

22.05 kHz Sample Rate

- Matches the Sound Blaster Pro’s hardware limit for games (*half the 44.1 kHz CD standard*). - Reduces high-frequency aliasing, just like the original DAC’s analog low-pass filter.

8-Bit Depth + TPDF Dithering

- The SB Pro used 8-bit DACs for digital audio (e.g., VOC files). - Shibata noise shaping: `TPDF` (Triangular Probability Density Function) with Shibata noise shaping mimics the card’s analog noise floor, avoiding "digital grit" while preserving dynamics.

Brown Noise Layer

- Adds a subtle `-50dB` brown noise hiss to emulate: - The SB Pro’s analog output stage. - CRT monitor interference (iconic for DOS gaming).

Low-Pass Filter @ 7500 Hz

- Replicates the Sound Blaster’s physical output filter, which rolled off frequencies above ~7.5 kHz.

Overdrive + Gain Reduction

- Gain -1: Light distortion from the SB Pro’s op-amp circuits. - Gain -1: Prevents clipping after dithering/noise injection.

📼 Authenticity Notes

- Tested against recordings from *Duke Nukem 3D* (SB Pro) and *DOSBox-Staging*’s SB emulation. - The chain (`sox` effects + noise shaping) mirrors how games like *Doom* mixed PCM audio.

⚙️ Compatibility

- Designed for 1.0.3+1.20 1.0.3+1.20 (other versions untested!).

🖇️ Credits

- Inspiration: `sox` for DSP, `find`/`bash` for batch processing. - Inspiration: VOGONS community, SBEMU, and real SBPro hardware tests.

*"It’s not a bug – it’s a feature (of 1992)."*