---
title: "Calculate DSI from a previously uploaded sustained vowel (SV) recording and required voice-range parameters. All para…"
method: GET
path: "/api/calculate-dsi"
tags: ["Voice Quality Metrics"]
---

# Calculate DSI from a previously uploaded sustained vowel (SV) recording and required voice-range parameters. All para…

`GET /api/calculate-dsi`

## Request

- Base URL: `https://platform.vocametrix.com`
- URL: `https://platform.vocametrix.com/api/calculate-dsi`
- Auth: API key in header `X-API-Key`

## Query parameters

- `svFileId` string, required
- `mpt` number, required
- `maximumF0` number, required
- `minimumIntensity` number, required
- `age` integer, required
- `gender` integer, required
- `version` string

## Response `200`

Successful response

- object
  - `DSI` number: number - Dysphonia Severity Index score (approx range -5 to +5). Example: 1.85
  - `JITTER` number: number - Jitter PPQ5 (Praat, %) entering the DSIbeta formula. Example: 0.45
  - `MPT` number: number - Maximum Phonation Time in seconds (echoes input MPT or measured). Example: 15.2
  - `MINLEVEL` number: number - Minimum intensity level in dB SPL. Example: 45.5
  - `MAXF0` number: number - Maximum fundamental frequency in Hz. Example: 440.0
  - `PATIENT_AGE` number: number - Patient age (integer). Example: 35
  - `PATIENT_GENDER` string: string - Human-readable gender label (e.g. "Female")
  - `AGE_GROUP` string: string - Age group label, informational only (e.g. "Young adult / Middle-aged")
  - `PRESBYLARYNGIS_RISK` number: number - Flag set to 1 when age ≥ 65, informational only: the DSI is not adjusted for age. Example: 0
  - `EXPECTED_F0_RANGE` string: string - Gender-specific expected F0 range. Example: "150-350 Hz"

## Other responses

- `400`: Bad request — missing or invalid parameter
- `401`: Unauthorized — missing or invalid API key
- `429`: Rate limit exceeded
- `500`: Server error

---

[API](https://skmtc.dev/vocametrix/apis/vocametrix-api.md) · [All operations](https://skmtc.dev/vocametrix/apis/vocametrix-api/llms.txt) · [OpenAPI document](https://skmtc.dev/vocametrix/apis/vocametrix-api/revisions/8a54d01bcc81?raw)