Delay and reverb time from BPM API

Computes the tempo-synced delay/reverb pre-delay time in ms (and Hz) for a chosen note value, plus dotted and triplet variants and the bar duration — to lock time-based FX to the groove. Answers 'What delay time syncs an eighth note at 120 BPM?', 'Dotted delay ms for this tempo?'.

Price$0.04per request

MethodPOST

Route/v1/music/delay-time

StatusLive

MIME typeapplication/json

Rate limit120/minute

Cache0s public

musicdelayreverbbpmtempo-syncfxmillisecondsproductionaudio

API URLhttps://x402.hexl.dev/v1/music/delay-time

Integration docs

Example request

{
  "bpm": 120,
  "noteValue": "eighth"
}

Example response

{
  "bpm": 120,
  "noteValue": "eighth",
  "delayMs": 250,
  "dottedDelayMs": 375,
  "tripletDelayMs": 166.6667,
  "delayHz": 4,
  "barDurationMs": 2000,
  "beatsPerBar": 4,
  "note": "delay/reverb pre-delay set to this ms locks the FX to the groove"
}

Input schema

{
  "type": "object",
  "required": [
    "bpm"
  ],
  "properties": {
    "bpm": {
      "type": "number",
      "examples": [
        120
      ]
    },
    "noteValue": {
      "type": "string",
      "examples": [
        "quarter",
        "eighth",
        "1/16"
      ]
    },
    "beatsPerBar": {
      "type": "number",
      "examples": [
        4
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}