netcomposer.art · raw: json · md

Performance record: The C major Prelude, harmony only (after Bach, BWV 846): take 6 arps, 1/4 delay, hall 25%, LP 1 kHz

Performance perf_bwv846-take6_arps_dly_lp1k · performed 2026-10-17 15:47:29-07:00 (PDT, UTC−7) · 129.2 s · Algorithmic Performer · seed 846

Status: not yet published · record UNSIGNED (signing is open decision #33) · record hash c1f64dbf2d9e62ce…

Credits

- Music: Johann Sebastian Bach, Prelude in C major, BWV 846, Das Wohltemperierte Klavier I (1722). Public domain.
- Composition: by Peter (compositions/bach_bwv846_prelude_progression.md).
- Harmonic analysis: Mark Gotham et al., When in Rome corpus (github.com/MarkGotham/When-in-Rome), CC BY-SA 4.0.
- Sounds: 26 arpeggio recordings by Peter, musicmatter.art, CC BY-SA 4.0, used 74 times.
- Performer: Astrid, NetComposer Algorithmic Performer (render6_arps_dly_lp1k.py). Effect settings requested by Peter.

Sounds used

SoundSupplierLicenseUsesBarsStretch
adim7-arp-updown-1.flacPeterCC BY-SA 4.02281.59×
am7-arp-updown-6.flacPeterCC BY-SA 4.0291.59×
amin-arp-updown-2.flacPeterCC BY-SA 4.0251.59×
bdim7-arp-updown-1.flacPeterCC BY-SA 4.02141.59×
bdim7-arp-updown-4.flacPeterCC BY-SA 4.02231.59×
c7-arp-updown-2.flacPeterCC BY-SA 4.0420, 321.59×
cmaj-arp-updown-2.flacPeterCC BY-SA 4.0425, 291.59×
cmaj-arp-updown-4.flacPeterCC BY-SA 4.081, 4, 19, 351.59×, 1.88×
cmaj-arp-updown-5.flacPeterCC BY-SA 4.02151.59×
cmaj7-arp-updown-6.flacPeterCC BY-SA 4.0281.59×
csus4-arp-updown-4.flacPeterCC BY-SA 4.04 (layer ×4)26, 301.59×
d7-arp-updown-3.flacPeterCC BY-SA 4.0261.59×
d7-arp-updown-5.flacPeterCC BY-SA 4.02101.59×
dm7-arp-updown-1.flacPeterCC BY-SA 4.02171.59×
dm7-arp-updown-6.flacPeterCC BY-SA 4.042, 331.59×, 1.66×
dmin-arp-updown-6.flacPeterCC BY-SA 4.02131.59×
dsharpdim7-arp-updown-4.flacPeterCC BY-SA 4.02221.59×
fmaj7-arp-updown-3.flacPeterCC BY-SA 4.02161.59×
fmaj7-arp-updown-4.flacPeterCC BY-SA 4.02211.59×
g7-arp-updown-1.flacPeterCC BY-SA 4.0231.59×
g7-arp-updown-2.flacPeterCC BY-SA 4.0818, 24, 27, 311.59×
g7-arp-updown-3.flacPeterCC BY-SA 4.02341.75×
gdim7-arp-updown-6.flacPeterCC BY-SA 4.02121.59×
gmaj-arp-updown-5.flacPeterCC BY-SA 4.0271.59×
gmaj-arp-updown-6.flacPeterCC BY-SA 4.02111.59×
gsus4-arp-updown-2.flacPeterCC BY-SA 4.0426, 301.59×
26 sounds74

Stretch = output length ÷ source length (time only, no pitch change). Every sound's sha256 is in the record JSON, and each file is sample-identical to the FLAC on musicmatter.art.

Hacks chain

1. Delay: 1/4 note, following the tempo (870 ms at 69 BPM, 904 ms at bar 33, 956 ms at bar 34, 1026 ms at bar 35+tail), 40% feedback, return −9 dB
2. Reverb: synthetic hall, generated in the script (no external IR), RT60 2.6 s, 22 ms predelay, seed 846, 25% wet
3. Low-pass: 1 kHz, 24 dB/oct (Butterworth, SOS), whole mix
4. Tail: rings out to −60 dB, then a 2.5 s fade
5. Loudness: two-pass linear, −14 LUFS / −1 dBTP ceiling, measured −14.0 LUFS, −2.4 dBTP

Tempo: 69 BPM throughout · broadening: bar 33 +4%, bar 34 +10%, bar 35 +18%.

License & attribution

CC BY-SA 4.0. Every input is public domain or CC BY-SA 4.0, with no NC or ND inputs, so this output can be CC BY-SA 4.0.

Ready to paste:

“The C major Prelude, harmony only (after Bach, BWV 846)”, NetComposer Performance perf_bwv846-take6_arps_dly_lp1k, composed by Peter after J.S. Bach (public domain), with harmonic analysis from When in Rome by Mark Gotham et al. (CC BY-SA 4.0, github.com/MarkGotham/When-in-Rome). Performed by the NetComposer Algorithmic Performer (Astrid) from 26 arpeggio recordings by Peter (musicmatter.art, CC BY-SA 4.0). Licensed CC BY-SA 4.0, https://creativecommons.org/licenses/by-sa/4.0/

Files: bach_bwv846_take6_arps_dly_lp1k.wav sha256 96af63629d77fac7… · .mp3 sha256 04491515a4aa07fa…

Amendment

2026-10-17T19:29:52-07:00: contributor display name changed from Petrus to Peter (Peter Semmelhack) for netcomposer.art, at his request. Nothing else changed. Previous record hash 06c7022509c4c760…, new c1f64dbf2d9e62ce….