KFR 7
major update for C++ DSP library
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Key additions:RVV SIMD support for RISC-V devices.Elliptic IIR filter design and zero-phase IIR filtering via filtfilt.Audio reading/writing completely reworked and now supports WAV, W64, RF64/BW64, AIFF, FLAC, CAF, ALAC, MP3, and raw formats.New high-level Audio module for multichannel processing.There are also performance improvements since KFR6 for DFT (up to 40% on ARM) and matrix transpose (up to 30%).
HN · launched Nov 17, 2025 · 6 upvotes (top 73%) · 0 views
Niche: digital signal processing libraries · 32 launches, 1 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
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More like this: all 32 launches in digital signal processing libraries →
Could you build this?
No A high-performance C++ digital signal processing library featuring RISC-V Vector (RVV) SIMD optimizations and advanced filter design requires deep mathematical and low-level hardware expertise.
What it would actually take: KFR requires implementing advanced DSP algorithms (elliptic filter synthesis, zero-phase filtering, FFTs) optimized with architecture-specific SIMD intrinsics (AVX-512, NEON, RVV) in modern C++. The critical barriers are numerical stability analysis, deep DSP mathematics, custom audio codec implementations, and cycle-level assembly/vectorization optimization. It requires PhD-level or senior audio/DSP engineers and computer architecture specialists.
Discussion
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Competitors
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Attention rank: #125 of 163 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Looks like the first mover among its competitors.
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