# Mosqito.NET

> Part of [LISQM](https://zhenxianli.github.io/LISQM/) (List of Implementations of Sound Quality Metrics), a list of open-source implementations of psychoacoustic metrics. Data as of 2026-10-28. Web page: https://zhenxianli.github.io/LISQM/projects/mosqito-net.html

**Newly released project.** First published on GitHub in April 2026. Not yet seen to be widely used in the community. Check its validation before relying on it.

C# (.NET 8) port of MoSQITo 1.2.1 with the same metrics: ISO 532-1 loudness, ECMA-418-2 (2nd edition) loudness and roughness, DIN 45692 sharpness, Daniel & Weber roughness, and ECMA-74 tone-to-noise and prominence ratios.

- **Repository:** https://github.com/onur-akaydin/Mosqito.NET
- **Language:** C#
- **Kind:** Library/Toolbox (Functions to call from your own code: a Python package, a MATLAB toolbox, or a C, C++, C#, Rust or Julia library.)
- **Group:** newly released (First released less than about a year ago, and not yet seen to be widely used in the community.)
- **Licence:** Apache-2.0 — NOTICE.md states that it is derived from MoSQITo 1.2.1 (Apache-2.0).
- **Latest release:** no release
- **Last commit:** 2026-06-07 (active)
- **GitHub stars:** 0
- **Maintainers:** onur-akaydin
- **AI assistance:** disclosed — The README says the port "was produced largely with AI assistance (Claude)"; most commits of 16 and 17 April 2026 have Claude as co-author.
- **How to cite:** The project does not say how to cite it. Cite the repository with the version or commit you used.
- **Entry checked:** 2026-10-07

## What it implements

| Metric | Edition | Functions | Status | Validation (as stated) | Notes |
|---|---|---|---|---|---|
| [Zwicker loudness](https://zhenxianli.github.io/LISQM/metrics/loudness-zwicker.html) | [ISO 532-1:2017](https://www.iso.org/standard/63077.html) (stationary (also per segment and from a spectrum) and time-varying) | `Sq.LoudnessZwst`, `Sq.LoudnessZwstFreq`, `Sq.LoudnessZwstPerSeg`, `Sq.LoudnessZwtv` | available | standard or paper data; also compared with MoSQITo (its source) | — |
| [Sottek Hearing Model loudness](https://zhenxianli.github.io/LISQM/metrics/loudness-ecma-418-2.html) | [ECMA-418-2:2022 (2nd ed.)](https://ecma-international.org/wp-content/uploads/ECMA-418-2_2nd_edition_december_2022.pdf) (Clause 5 hearing-model loudness only, as in MoSQITo) | `Sq.LoudnessEcma` | available | compared with MoSQITo (its source) | — |
| [Sharpness](https://zhenxianli.github.io/LISQM/metrics/sharpness.html) | [DIN 45692:2009](https://www.dinmedia.de/en/standard/din-45692/117635111) (weightings: DIN 45692, Aures, von Bismarck, Fastl) | `Sq.SharpnessDinSt`, `Sq.SharpnessDinTv`, `Sq.SharpnessDinPerSeg`, `Sq.SharpnessDinFreq` | available | compared with MoSQITo (its source) | — |
| [Roughness (Daniel & Weber)](https://zhenxianli.github.io/LISQM/metrics/roughness-daniel-weber.html) | [Daniel & Weber (1997)](https://zhenxianli.github.io/LISQM/standards.html#ref-daniel-weber-1997) | `Sq.RoughnessDw`, `Sq.RoughnessDwFreq` | available | compared with MoSQITo (its source) | — |
| [Sottek Hearing Model roughness](https://zhenxianli.github.io/LISQM/metrics/roughness-ecma-418-2.html) | [ECMA-418-2:2022 (2nd ed.)](https://ecma-international.org/wp-content/uploads/ECMA-418-2_2nd_edition_december_2022.pdf) | `Sq.RoughnessEcma` | available | compared with MoSQITo (its source) | — |
| [Tone-to-noise ratio and prominence ratio](https://zhenxianli.github.io/LISQM/metrics/tone-to-noise-prominence-ratio.html) | [ECMA-74:2019 (17th ed.)](https://ecma-international.org/publications-and-standards/standards/ecma-74/) | `Sq.TnrEcmaSt`, `Sq.TnrEcmaFreq`, `Sq.TnrEcmaPerSeg`, `Sq.PrEcmaSt`, `Sq.PrEcmaFreq`, `Sq.PrEcmaPerSeg` | available | compared with MoSQITo (its source) | The README cites ECMA-74 Annex D. |
| [Equal-loudness contours](https://zhenxianli.github.io/LISQM/metrics/equal-loudness-contours.html) | [ISO 226:2003](https://www.iso.org/standard/34222.html) | `Sq.EqualLoudnessContours` | available | not stated | Code comments say ISO 226:1987, but the tables are ported from MoSQITo, whose code follows Jeff Tackett's ISO 226:2003 implementation. |

## How it was validated

As reported by the project; LISQM has not run the code. Two implementations that agree can still share the same error.

- [Zwicker loudness](https://zhenxianli.github.io/LISQM/metrics/loudness-zwicker.html), ISO 532-1:2017: standard or paper data; also compared with **[MoSQITo](https://zhenxianli.github.io/LISQM/projects/mosqito.html)** (its source)
  - Ported or adapted from **[MoSQITo](https://zhenxianli.github.io/LISQM/projects/mosqito.html)**. It was compared with the code it was ported from, which checks the port only.
  - Unit tests ported from MoSQITo compare stationary loudness with ISO 532-1 Annex B values.
  - Every public function is compared with the output of Python MoSQITo for seven WAV files (three of them ISO 532-1 test signals), within 1 % (0.5 dB for levels).
- [Sottek Hearing Model loudness](https://zhenxianli.github.io/LISQM/metrics/loudness-ecma-418-2.html), ECMA-418-2:2022 (2nd ed.); [Sharpness](https://zhenxianli.github.io/LISQM/metrics/sharpness.html), DIN 45692:2009; [Roughness (Daniel & Weber)](https://zhenxianli.github.io/LISQM/metrics/roughness-daniel-weber.html), Daniel & Weber (1997); [Sottek Hearing Model roughness](https://zhenxianli.github.io/LISQM/metrics/roughness-ecma-418-2.html), ECMA-418-2:2022 (2nd ed.); [Tone-to-noise ratio and prominence ratio](https://zhenxianli.github.io/LISQM/metrics/tone-to-noise-prominence-ratio.html), ECMA-74:2019 (17th ed.): compared with **[MoSQITo](https://zhenxianli.github.io/LISQM/projects/mosqito.html)** (its source)
  - Ported or adapted from **[MoSQITo](https://zhenxianli.github.io/LISQM/projects/mosqito.html)**. It was compared with the code it was ported from, which checks the port only.
  - Every public function is compared with the output of Python MoSQITo for seven WAV files (three of them ISO 532-1 test signals), within 1 % (0.5 dB for levels); MoSQITo's unit tests are ported too.

Not stated for Equal-loudness contours · ISO 226:2003.

## Before you compare numbers

Implementations of the same metric can give different numbers without either being wrong. Check these choices first.

- Time-varying loudness and ECMA-418-2 roughness resample input at any other rate to 48 kHz, and stationary loudness resamples rates below 48 kHz; MoSQITo rejects rates above 48 kHz for time-varying loudness.


## Notes

- First commit on 2026-04-16; 16 commits, the latest on 2026-06-07. There is no GitHub release.
- Also ports MoSQITo's speech intelligibility index (ANSI S3.5), which is outside the scope of this list.

## Before you rely on it

- Very new and not yet seen to be widely used in the community; the README asks users to validate results against their own reference data before relying on them.
- Its ECMA-418-2 functions follow the 2nd edition (2022), two editions behind the current one, as in MoSQITo.

## Sources

- https://github.com/onur-akaydin/Mosqito.NET
- https://github.com/onur-akaydin/Mosqito.NET/blob/master/README.md
- https://github.com/onur-akaydin/Mosqito.NET/blob/master/NOTICE.md
- https://github.com/onur-akaydin/Mosqito.NET/commits/master/
- https://github.com/Eomys/MoSQITo/issues/98