Back to Home11/17/2025, 3:16:50 PM

Show HN: KFR 7 – major update for C++ DSP library

danlcaza
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Mood

calm

Sentiment

positive

Category

tech

Key topics

C++

DSP

Audio Processing

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%).

The author announces a major update to their C++ DSP library, KFR, with new features and performance improvements, but receives no comments or discussion on the post.

Snapshot generated from the HN discussion

Discussion Activity

Light discussion

First comment

3h

Peak period

1

Hour 3

Avg / period

1

Comment distribution1 data points

Based on 1 loaded comments

Key moments

  1. 01Story posted

    11/17/2025, 3:16:50 PM

    1d ago

    Step 01
  2. 02First comment

    11/17/2025, 5:47:51 PM

    3h after posting

    Step 02
  3. 03Peak activity

    1 comments in Hour 3

    Hottest window of the conversation

    Step 03
  4. 04Latest activity

    11/17/2025, 5:47:51 PM

    1d ago

    Step 04

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ID: 45954312Type: storyLast synced: 11/17/2025, 3:18:03 PM

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