The KWave package contains a KDE Frameworks based Sound Editor application.
This package is known to build and work properly using an LFS 12.4 platform.
Download (HTTP): https://download.kde.org/stable/release-service/25.08.0/src/kwave-25.08.0.tar.xz
Download MD5 sum: 4c40db05a66ddfcfedb9fb9143cbecaf
Download size: 6.2 MB
Estimated disk space required: 87 MB
Estimated build time: 1.2 SBU (using parallelism=4)
AudioFile-0.3.6, fftw-3.3.10, id3lib-3.8.3, and KDE Frameworks-6.17.0
alsa-lib-1.2.14, FLAC-1.5.0, libogg-1.3.6, and PulseAudio-17.0
Install KWave by running the following commands:
mkdir build &&
cd    build &&
cmake -D CMAKE_INSTALL_PREFIX=$KF6_PREFIX \
      -D CMAKE_BUILD_TYPE=Release         \
      -D BUILD_TESTING=OFF                \
      -W no-dev .. &&
make
        This package does not come with a test suite.
          Now, as the root user:
        
make install