Projects
SQAT and MoSQITo (widely used), and sottek-hearing-model (a very good implementation) are in bold and come first in every list. The other established projects follow, then newly released, developing and legacy ones. Tools that only call another project are listed under Others, and projects whose code could not be opened under Status unknown. “Last commit” is the last commit on the default branch. A project is marked inactive after 365 days without a commit, and listed as legacy after three years.
- ported or adapted from another project
- the author's own code
- used at run time
- results checked against
- same contributor
- SQAT SQAT, MoSQITo, and sottek-hearing-model
- legacy legacy project
- ISO 532-1 program published with a standard or a paper
Scroll the picture sideways, or read the same relations in words on the map page.
The map page explains each kind of line and lists the same relations in words.
Established projects 11
Described in a publication, used by others, or written by the authors of the model, with more than a year of history.
Newly released projects 12
First released less than about a year ago, and not yet seen to be widely used in the community.
Developing projects 2
Public for more than a year, but without a publication or documented use by others: research, teaching or personal code.
| Project | Language | Licence | Latest release | Last commit | Covers |
|---|---|---|---|---|---|
| pySQAT Library/Toolbox | Python | none | no release | 2026-06-27 active | Zwicker loudness, Sottek Hearing Model loudness, Sharpness, Roughness (Daniel & Weber), Sottek Hearing Model roughness, Fluctuation strength (Osses et al.), Tonality (Aures), Sottek Hearing Model tonality, Psychoacoustic annoyance, Perceived noise level and EPNL |
| LoudnessModel Research code | Python | BSD-2-Clause | no release | 2025-03-20 inactive | Time-varying loudness (Moore–Glasberg–Schlittenlacher) |
Legacy projects 12
Archived, or no commit for three years or more. Kept for reference. The code may follow an older edition and may not run with current software.
Others 3
Tools that do not compute the metrics themselves: interfaces, front ends and wrappers that call one of the listed projects. They are not listed under the metrics.
| Project | Language | Licence | Latest release | Last commit | Calls |
|---|---|---|---|---|---|
| PsychoBox Application | Python | MIT | no release | 2026-03-16 active | MoSQITo |
| Soundscapy Library/Toolbox | Python | BSD-3-Clause | v0.8.5 (2026-05) | 2026-05-14 active | MoSQITo |
| ZwickerLoudnessAudio.jl Library/Toolbox | Julia | MIT | v0.3.0 (2026-09) | 2026-09-02 active | ZwickerLoudness.jl |
Status unknown 1
Projects whose code could not be opened, for example because the repository needs a login. What they implement is unverified, so they are listed with what they claim and not under the metrics.
| Project | Language | Licence | Latest release | Last commit | Claims |
|---|---|---|---|---|---|
| PsyTools Library/Toolbox | Python | unknown | unknown | unknown unknown | A conference paper describes an open-source Python toolbox for standardised psychoacoustic analysis: loudness, sharpness, fluctuation strength, roughness, tonality, psychoacoustic annoyance, LAeq and LAmax, following ISO 532-1, DIN 45692 and ECMA-418, with the Zwicker model and the Sottek Hearing Model. |