add operation: generate spectrogram

package-lock.json

@@ -38,6 +38,7 @@
         "d3-hexbin": "^0.2.2",
         "diff": "^5.2.0",
         "dompurify": "^3.2.5",
+        "dsp.js": "^1.0.1",
         "es6-promisify": "^7.0.0",
         "escodegen": "^2.1.0",
         "esprima": "^4.0.1",
@@ -99,6 +100,7 @@
         "utf8": "^3.0.0",
         "uuid": "^11.1.0",
         "vkbeautify": "^0.99.3",
+        "wavefile": "^11.0.0",
         "xpath": "0.0.34",
         "xregexp": "^5.1.1",
         "zlibjs": "^0.3.1"
@@ -8470,6 +8472,12 @@
         "url": "https://github.com/motdotla/dotenv?sponsor=1"
       }
     },
+    "node_modules/dsp.js": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/dsp.js/-/dsp.js-1.0.1.tgz",
+      "integrity": "sha512-5ols1j2i2tdbtd38DMR6xGSmE8dE/qFWgqrNN1ZNnIZnOEAFjzoVq5hM57nbQS9u0VmxqCUw8YccgsS9+zhtNg==",
+      "license": "MIT"
+    },
     "node_modules/dunder-proto": {
       "version": "1.0.1",
       "resolved": "https://registry.npmjs.org/dunder-proto/-/dunder-proto-1.0.1.tgz",
@@ -18254,6 +18262,18 @@
         "node": ">=10.13.0"
       }
     },
+    "node_modules/wavefile": {
+      "version": "11.0.0",
+      "resolved": "https://registry.npmjs.org/wavefile/-/wavefile-11.0.0.tgz",
+      "integrity": "sha512-/OBiAALgWU24IG7sC84cDO/KfFuvajWc5Uec0oV2zrpOOZZDgGdOwHwgEzOrwh8jkubBk7PtZfQBIcI1OaE5Ng==",
+      "license": "MIT",
+      "bin": {
+        "wavefile": "bin/wavefile.js"
+      },
+      "engines": {
+        "node": ">=8"
+      }
+    },
     "node_modules/wbuf": {
       "version": "1.7.3",
       "resolved": "https://registry.npmjs.org/wbuf/-/wbuf-1.7.3.tgz",