diff --git a/src/plugins/spectrogram.ts b/src/plugins/spectrogram.ts
index 45be58ace..60cc953f4 100644
--- a/src/plugins/spectrogram.ts
+++ b/src/plugins/spectrogram.ts
@@ -291,6 +291,8 @@ export type SpectrogramPluginOptions = {
   | 'roseus'
   /** Render a spectrogram for each channel independently when true. */
   splitChannels?: boolean
+  /** URL with pre-computed spectrogram JSON data, the data must be a Uint8Array[][] **/
+  frequenciesDataUrl?: string
 }
 
 export type SpectrogramPluginEvents = BasePluginEvents & {