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	MP3 at 192 kb/s
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

Some recent versions of Google Chrome enable a feature called “Scams Protection”, which may block the audio engine and prevent the virtual instruments from functioning.
Open chrome://settings/security and disable:
Scams protection
Enhanced protection
Reload the page.

Recommended alternative:
If you prefer not to modify Chrome, use Chromium or Ungoogled Chromium, which work perfectly with all instruments.
(Firefox is not recommended for high-polyphony instruments.)

· 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

· Special case: Organ of Sants Just i Pastor

Largest instrument: 1632 pipes individually sampled
Multiple temperaments and tunings
Convolution reverb
Requires a powerful computer with plenty of resources

· 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

? Want to know more?

You can ask ChatGPT about this project using the following keywords (already pre-filled):

Ask ChatGPT about this project

Some parts of this project have been assisted by AI tools under human supervision, always ensuring accuracy, clarity, and respect for the original sources.
This collection of virtual instruments is based on open web technologies such as WebMIDI and WebAudio, allowing direct interaction without installation.
If you're a developer, you can explore an example of integrated WebMIDI usage in embed.js.

Attribution-NonCommercial-NoDerivs 4.0 International Creative Commons License