🕹️ psx sample

🎮

Drop audio file(s) here or click to browse

Multiple files = batch convert & download

Pre Low-Pass Filter (shape input before encoding)

22000 Hz

Sample Rate (lower = more Gaussian smoothing)

Bit Depth Reduction

16-bit

Pitch Ratio

1.00x

Additional pitch shift with authentic Gaussian interpolation. Affects playback speed.

Convert to mono

Pre Low-Pass: Shape the input spectrum before encoding — define what frequencies enter the chain
Sample Rate: Decimate to simulate memory-constrained samples. Lower rates = more Gaussian smoothing on playback
ADPCM Codec: Authentic PS1 SPU compression — 16-bit → 4-bit using shift + filter prediction (always enabled)
Bit Depth: Additional quantization after ADPCM decode (16-bit = no extra reduction)
Pitch + Gaussian: Combined pitch = (sample rate ÷ 44100) × pitch ratio, with SPU pitch counter and 512-entry Gaussian weight table

References: SPU implementation based on PlayStation: The SPU by jsgroth and psx-spx documentation.