Dpdo

Changelog

Version 6.66.0

Released: 2024-12-30

DpdoEngine

New Features

  • 11th-order IIR noise shaping — 11th order added on top of the existing 3/5/7/9, delivering industry-leading in-band noise shaping
  • HRTF spatial audio — new 3D spatial audio rendering module based on head-related transfer functions, enhancing headphone soundstage
  • DXD output mode — direct output in DXD (Digital eXtreme Definition, 352.8 kHz/24-bit), compatible with professional audio workstations
  • Psychoacoustic noise shaping — new perceptual noise shaping (-psy) using auditory masking to optimize noise distribution
  • Adaptive parameters — new adaptive adjustment (-adaptive) that optimizes processing parameters dynamically
  • OpenCL GPU acceleration — GPU acceleration framework significantly reduces processing time for high-order oversampling and long FIR filtering
  • Look-ahead limiter (LAL) — new -lal transient peak protection
  • Anti-popping overflow filter (APO) — clipping protection
  • Stereo expander — stereo width expansion module
  • Mastering presets — classical, pop and jazz presets
  • Dpdo DSP modules — bass, treble, parametric EQ, crossfeed
  • 8 dither types — rectangle, triangle, noise-shaped and more
  • LUFS loudness normalization — ITU-R BS.1770 loudness measurement and gain adjustment
  • ReplayGain — ReplayGain metadata normalization
  • DST compression — native DST encoding, lossless DSD stream compression
  • Native DSD recording — direct DSD stream recording, bypassing PCM intermediate format
  • Pipe output mode — -pipe stdin/stdout pipeline processing
  • Statistics — -stats output
  • Spectrogram — -spectrogram generation
  • Reverse conversion — --reverse DSD → PCM
  • User preset system — -preset-load/save/list
  • Analysis reports — -pdfrp PDF reports, -noise-profiling
  • Metadata support — full metadata parameters (artist, title, album, genre, etc.)
  • Auto-pan correction — automatic channel offset detection and correction
  • Equalizer — multi-band parametric EQ
  • Harmonic saturation — tanh/poly/softclip/fullwave/tape distortion types

Improvements

  • E-series noise shaping algorithms upgraded to double-precision floating point
  • Optimized multi-threaded concurrency
  • Improved large-file (over 4 GB) handling
  • Enhanced DST encoding compatibility and stability

Fixes

  • Fixed boundary stability of the noise shaper at certain sample rates
  • Fixed metadata alignment when writing DFF
  • Fixed OpenCL device enumeration compatibility

DpdoPackSACD

New Features

  • Full SACD ISO authoring support
  • Metadata system: album, artist, cover, genre, year, label, composer, conductor
  • CUE track sheet import
  • Dpdo DSD Disc (DVD-R/RW) support
  • Barcode (EAN/UPC) and ISRC support
  • Multichannel SACD support

DpdoPlayer

New Features

  • Native DSD playback (DSF/DFF)
  • Device selection (-dev)
  • Channel layout configuration (-layout)
  • Playback modes: standard, differential, BTL
  • DoP modes: auto/force/native
  • Volume control (-vol)
  • Low-latency stream mode (-stream)
  • Pipe input support

Known Issues

  • 11th-order IIR is slow on some older CPUs; OpenCL acceleration recommended
  • DST-compressed files may need decompression to DSF on some third-party players
  • DpdoPlayer on macOS may require manual device-name configuration for some USB DACs