v1.7.0 — Musical Timing, Pitch & Spectral Processing

DSPark 1.7.0 expands the header-only framework with production-ready musical
timing, pitch, spectral processing, native file formats, and stronger real-time
contracts.

Musical timing, pitch, and spectral processing

• Added OnsetDetector, BeatTracker, and LoopFinder for transient analysis,
  tempo/phase tracking, and bounded crossfade-ready loop discovery.
• Added TimeStretch for independent high-quality duration and pitch control.
• Added PitchCorrector with YIN detection, scale-aware quantization, glide,
  and formant preservation.
• Added SpectralFreeze with phase-aware advance, reconstruction, and
  decorrelation modes.
• Added KeyDetector and offline LoudnessNormalizer processing under a
  true-peak ceiling.

Native formats and hardened I/O

• Added dependency-free native FLAC decoding with FlacFile.
• Added Standard MIDI File reading and writing with MidiFile.
• Hardened WAV, MP3, FLAC, and MIDI parsing against malformed sizes, truncated
  data, and invalid metadata without introducing runtime codec dependencies.

Real-time and public API contracts

• Automatic analysis windows now preserve their time span across sample rates,
  with resolved sizes exposed for latency accounting.
• Audio-thread adoption of staged multi-word state is bounded; a contended
  update may be deferred, but the callback never waits for the control thread.
• Added Biquad::setCoeffsNow() for stream-owner, single-threaded, and offline
  coefficient updates. BiquadCoeffs and the biquad recursion now use double
  precision for all sample types.
• AudioBufferView conversions now express const-correctness as constraints,
  and AudioProcessor now represents an unambiguous in-place mutable-buffer
  processor.
• Allocation failures and invalid prepare() arguments preserve safe, valid
  state across the affected processors and buffers.

Validation and distribution

• Package recipes for Conan and vcpkg are pinned to the immutable 1.7.0 source
  authority.
• CI covers GCC, Clang, MSVC, x64, ARM64, AddressSanitizer,
  UndefinedBehaviorSanitizer, float-cast overflow, public header conformance,
  installed-header consumption, and concurrent-suite isolation.
• Plugin, DSParkLab, documentation, examples, benchmarks, and downstream CMake
  package consumers remain part of the release validation surface.

Most 1.6.1 code remains source-compatible. Review the
1.7.0 migration guide
for analysis-window latency, BiquadCoeffs, AudioBufferView, and
AudioProcessor changes.

See the full changelog
or compare v1.6.1...v1.7.0.