FreePats FSS Steel-String Acoustic Guitar — Selah Note web derivative

Original copyright 2008 Gary Campion / FlameStudios.
FreePats modifications 2016–2020 by roberto@zenvoid.org.
Selah Note encoding modifications 2026-09-28.

This derivative sample bank remains licensed under GPL version 3 or later.
We retain and extend the complete FreePats composition exception in UPSTREAM-README.txt
to our encoded samples. See GPL-3.0.txt for the full license.

Changes: apply a uniform -12 dB attenuation for encoding/mix headroom, then convert
44.1 kHz/16-bit mono WAV to 192 kbps mono MP3; retain each original
semitone root and its recorded velocity range; cap sample duration at 8 seconds with
an 80 ms final fade. Correct each recorded note to equal temperament at A440 using
a small playback-rate resample. Estimate the median pitch over three 200 ms body
windows with normalized autocorrelation and parabolic interpolation. Require correlation
confidence >= 0.9 and verify each encoded note within 2 cents of its A440 target.
guitar-manifest.json records the original offset, correction and verification for every file.
No per-note gain normalization, attack fade, synthesized round robins,
synthesized articulations, noise reduction, or new recording claims.

Corresponding source (original lossless WAVs, mappings and licenses):
source/FSS-SteelStringGuitar-SFZ-20200521.tar.xz
SHA-256: 720b55c5ad4dcfb9f788ab13a0bda834cbfd7b3214df2ca90648c58951e41777
Upstream download: https://freepats.zenvoid.org/Guitar/FSS-SteelStringGuitar/FSS-SteelStringGuitar-SFZ-20200521.tar.xz

Build recipe and full source: source/build-band-guitar.mjs.
To reproduce: use Node.js 22+, FFmpeg with libmp3lame, ffprobe, and tar.
In any project directory create scripts/ and dist/audio/band/steel-guitar/source/.
Save build-band-guitar.mjs into scripts/ and the original archive into the source/ directory.
Run: node scripts/build-band-guitar.mjs
Or: node scripts/build-band-guitar.mjs --archive=/absolute/path/to/FSS-SteelStringGuitar-SFZ-20200521.tar.xz
FFMPEG and FFPROBE environment variables may point to the respective executables.
The builder emits the MP3s, guitar-manifest.json, these notices and full source archive.

This is a separately licensed sound bank; the retained exception concerns compositions
that use its sounds. The full original wording is preserved in UPSTREAM-README.txt.