casacota.net virtual instruments - Summary

· Project purpose

To offer functional, accessible and musically valid versions of historical or unique instruments, playable directly in a web browser or inside an electron package. The project prioritizes sound preservation, education and open access. The engine of this web-based player has been developed hand in hand with these instruments. The most advanced version in all respects is the one used for the Cadaquers organ.

· Differences from conventional samplers

Feature	Conventional samplers	casacota.net
Sound phases	Attack, Sustain (loop), Release	Single sample up to 30s, pseudoloop.
Audio format	WAV, FLAC	WAV, FLAC, MP3
Player	Specialized sampler engine	Web browser (JavaScript), using a custom .atm extension served as HTML to optimize caching, or inside a locally installed electron package.
Sampling	All notes individually	In some cases only C notes, others interpolated using `midi2rate`
Purpose	Professional performance	Accessibility, education, preservation
Advanced features	Usually limited to ADSR envelopes, EQ, reverb, etc.	Dynamic control, attack control, harpsichord mechanism simulation, direct tuning, integrated convolution, human-readable and instantly editable code

· Strategies by instrument type

· Large instruments

Such as the Sant Just i Pastor organ:

Only C1, C2, C3... notes are sampled
Other notes are generated using midi2rate
Several historical temperaments are offered to enrich the result
Full sample sets are available on the server
There is also a full version presented

· Damaged or incomplete instruments

Such as the harmonium and celesta:

The original instruments were in poor condition
Only the playable notes were recorded
Missing notes were extrapolated from nearby ones
All source material is available with full transparency

· Small and complete instruments

Such as the Ghent carillon, the claviorgan or other museum instruments:

All actual samples are used
No interpolation needed
Fully functional within a browser

· Transparency and access

All original recordings are available on the server
Simplified virtual instruments are fully functional but never misleading
The project defends honesty, knowledge, and freedom of access

Attribution-NonCommercial-NoDerivs 4.0 International Creative Commons License