Professional products

HQPlayer 4 Pro


HQPlayer Pro is a high-quality audio file converter, recorder, and player for 64-bit Windows 10/11, macOS and Linux. HQPlayer features several user-selectable high-quality resamplers as well as user-selectable dither/noise shaping algorithms and delta-sigma modulators.

It is mainly intended as a mastering post-production tool for producing high-quality final distribution files in various formats. Any of the supported source formats can be converted to any of the supported destination formats. For example, DXD intermediate format can be converted to both PCM and DSD outputs.

Recording and playback are also supported in both PCM and SDM (DSD) formats. Playback feature also allows monitoring of final output format during conversion and recording, monitoring can be enabled/disabled on the fly.

HQPlayer Pro also includes a pipeline matrix for performing channel routing, mixing and gain adjustments, including convolution engine for applying advanced equalization or other kinds of effects.

Supported inputs:

  • CDDA (Audio CD)
  • FLAC
  • WavPack (PCM and DSD)
  • DSDIFF (DFF, non-compressed)
  • DSF
  • RIFF (WAV, including DXD/RF64)
  • AIFF
  • MP3
  • PCM and DSD from an audio device

Supported outputs:

  • FLAC
  • WavPack (PCM and DSD)
  • DSDIFF (DFF, non-compressed)
  • DSF
  • RIFF (WAV, including DXD/RF64)
  • AIFF
  • MP3
  • PCM and DSD to an audio device


  • Automatic gapless output track splicing for album processing
  • Switchable realtime output monitoring
  • Software upsampling / downsampling with selectable algorithm up to 32-bit 1.536 MHz or down to 16-bit 32 kHz PCM (61 options, most "apodizing")
  • Delta-Sigma modulators for upsampling PCM/DSD content up to 49.152 MHz 1-bit SDM (30 modulators, 3 SDM rate converters, 68 oversampling options)
  • Direct DSD up / down rate conversions (3 options)
  • Selectable dithering / noise shaping algorithm (10 options)
  • 128 DSP pipelines for routing and mixing with various algorithms
  • Selectable convolution algorithm (FIR) for equalization, such as digital room correction (2 options), for PCM/DSD content
  • Optional high-frequency expansion for the convolution engine
  • Parametric equalizers for PCM/DSD content, minimum- and linear-phase
  • RIAA de-emphasis equalization for PCM/DSD content
  • Software-based digital volume control for PCM and SDM (DSD)
  • Source content analysis to detect need for apodizing oversampling filter
  • Processing of DSF/DSDIFF files to any supported output (PCM conversion and DSD rate conversion)
  • Selectable algorithm and noise filters for DSF/DSDIFF to PCM conversion (14 / 12 options)
  • Native/direct recording and playback of DSF/DSDIFF files (ASIO DSD, DoP v1.1 with both 0x05/0xFA and 0x06/0xF9 markers)
  • Channel balance configuration for multichannel playback and processing (delay and level), for PCM and SDM (DSD)
  • Matrix processing for routing, filtering and mixing channels with gain, for PCM and SDM (DSD) content
  • Bypasses operating system software mixer and sample rate conversion
  • Support for professional ASIO drivers
  • Network endpoint support with Signalyst Asynchronous Network Audio Adapters
  • Support for ID3v2 tags on AIFF, DSF, DSDIFF and WAV files (versions 2.2, 2.3 and 2.4)
  • "Dual wire" channel bonding support to reach 2x rates, PCM and DoP (DSD)
  • 64/80/128-bit and arbitrary precision floating point processing
  • Full support for multi-core processors
  • Lightweight desktop-GUI to lower graphics noise
  • DSP offload to GPU using NVIDIA CUDA
  • Headphone cross-feed processing
  • Level adaptive loudness control
  • High dynamic range and distortion masking MP3 encoding modes

Resampling filters:

  • 40 linear phase
  • 3 intermediate phase
  • 11 minimum phase
  • 4 impulse optimal
  • 3 closed form

Dithers and noise-shapers:

  • 4 dithers
  • 5 noise shapers

Delta-Sigma conversion:

  • 30 modulators
  • 68 oversampling filters (64x - 2048x)
  • Direct rate conversions, 3 algorithms
  • Digital volume control
  • Convolution engine
  • Parametric equalizer
  • Routing and mixing

System requirements, Windows version:

  • Windows 10/11 x64
  • Audio interface with support for WASAPI Exclusive or ASIO
  • CPU support for AVX2 instruction set
  • Display adapter with OpenGL support
  • PDF reader software (such as Adobe Reader or Foxit Reader)

System requirements, Linux version:

  • Ubuntu 22.04 LTS (64-bit) or one of the variants (Ubuntu Studio is recommended as optimized version),
    Linux Mint 21 or Fedora Workstation 39
  • Audio interface with ALSA-drivers
  • CPU support for SSE4.2 instruction set (Ubuntu) or AVX2 instruction set (Fedora)
  • Display adapter with OpenGL support

System requirements, macOS version:

  • macOS version 12.00 or later
  • Audio interface with CoreAudio drivers
  • Display adapter with OpenGL support

System requirements, CUDA offload:

Recommended hardware:

  • RME ADI-2 Pro (Win/Mac/Linux)

DFF to DSF conversion utility

DFF to DSF command line conversion utility for Windows, Linux, and Mac OS X.

The utility requires Microsoft runtime, in case you get an error message about missing DLL, you can download the necessary (x86) runtime here.