generated: '2026-07-20'
method: searched
source: >-
  https://docs.modulate.ai/quickstart, https://docs.modulate.ai/faq,
  https://preview.modulate.ai/
free_tier:
  available: true
  description: >-
    Free credits are included when you create an account — no credit card required
    to get started. Usage is credit-based, priced per hour of audio processed.
  signup: https://platform.modulate.ai/signup-request
playground:
  name: Velma Preview
  url: https://preview.modulate.ai/
  description: >-
    Browser-based preview to explore voice analysis without writing code — try the
    models interactively before integrating.
test_mode:
  separate_test_keys: false
  note: >-
    There is no separate test/live key split. A single organization API key is used;
    testing is done against the live models within the free-credit allowance.
test_values:
  note: >-
    No magic/fixture test values (test cards, synthetic identifiers) are published —
    this is an audio-inference API. Provide real audio files in a supported format
    (AAC, AIFF, FLAC, MOV, MP3, MP4, OGG, Opus, WAV, WebM; batch max 100 MB).
usage_dashboard: https://platform.modulate.ai/dashboard/usage