diff --git a/package-lock.json b/package-lock.json
index 7437d8d..9125c06 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
         "postcss": "^8.4.27",
         "tailwindcss": "^3.3.3",
         "tone": "^14.8.49",
-        "zifferjs": "github:amiika/zifferjs",
+        "zifferjs": "file:../zifferjs",
         "zzfx": "^1.2.0"
       },
       "devDependencies": {
@@ -31,6 +31,22 @@
         "vite": "^4.4.5"
       }
     },
+    "../zifferjs": {
+      "version": "0.0.0",
+      "dependencies": {
+        "@types/seedrandom": "^3.0.5",
+        "lru-cache": "^10.0.0",
+        "seedrandom": "^3.0.5"
+      },
+      "devDependencies": {
+        "@vitest/ui": "^0.34.1",
+        "peggy": "^3.0.2",
+        "ts-pegjs": "^4.2.1",
+        "typescript": "^5.0.2",
+        "vite": "^4.4.5",
+        "vitest": "^0.34.1"
+      }
+    },
     "node_modules/@alloc/quick-lru": {
       "version": "5.2.0",
       "resolved": "https://registry.npmjs.org/@alloc/quick-lru/-/quick-lru-5.2.0.tgz",
@@ -1438,14 +1454,6 @@
       "resolved": "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.2.4.tgz",
       "integrity": "sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg=="
     },
-    "node_modules/lru-cache": {
-      "version": "10.0.1",
-      "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.0.1.tgz",
-      "integrity": "sha512-IJ4uwUTi2qCccrioU6g9g/5rvvVl13bsdczUUcqbciD9iLr095yj8DQKdObriEvuNSx325N1rV1O0sJFszx75g==",
-      "engines": {
-        "node": "14 || >=16.14"
-      }
-    },
     "node_modules/merge2": {
       "version": "1.4.1",
       "resolved": "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz",
@@ -2099,11 +2107,8 @@
       }
     },
     "node_modules/zifferjs": {
-      "version": "0.0.0",
-      "resolved": "git+ssh://git@github.com/amiika/zifferjs.git#022a8297313c37402434ad728db38641442e4659",
-      "dependencies": {
-        "lru-cache": "^10.0.0"
-      }
+      "resolved": "../zifferjs",
+      "link": true
     },
     "node_modules/zzfx": {
       "version": "1.2.0",
diff --git a/package.json b/package.json
index 99c70b3..44116ec 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,7 @@
     "postcss": "^8.4.27",
     "tailwindcss": "^3.3.3",
     "tone": "^14.8.49",
-    "zifferjs": "github:amiika/zifferjs",
+    "zifferjs": "file:../zifferjs",
     "zzfx": "^1.2.0"
   }
 }
diff --git a/src/API.ts b/src/API.ts
index 296c082..0e6b682 100644
--- a/src/API.ts
+++ b/src/API.ts
@@ -2,7 +2,7 @@ import { Editor } from "./main";
 import { scale } from './Scales';
 import { tryEvaluate } from "./Evaluator";
 import { MidiConnection } from "./IO/MidiConnection";
-import { next } from "zifferjs";
+import { next, Pitch, Chord, Rest } from "zifferjs";
 
 // @ts-ignore
 import { webaudioOutput, samples } from '@strudel.cycles/webaudio';
@@ -225,13 +225,23 @@ export class UserAPI {
     }
 
     public zn(input: string, options: {[key: string]: any} = {}): void {
-        const node = next(input, options);
+        const node = next(input, options) as any;
         const channel = options.channel ? options.channel : 0;
         const velocity = options.velocity ? options.velocity : 100;
         const sustain = options.sustain ? options.sustain : 0.5;
-        if(node.bend) this.MidiConnection.sendPitchBend(node.bend, channel);
-        this.MidiConnection.sendMidiNote(node.note!, channel, velocity, sustain);
-        if(node.bend) this.MidiConnection.sendPitchBend(8192, channel);
+        if(node instanceof Pitch) {
+            if(node.bend) this.MidiConnection.sendPitchBend(node.bend, channel);
+            this.MidiConnection.sendMidiNote(node.note!, channel, velocity, sustain);
+            if(node.bend) this.MidiConnection.sendPitchBend(8192, channel);
+        } else if(node instanceof Chord) {
+            node.pitches.forEach(pitch => {
+                if(pitch.bend) this.MidiConnection.sendPitchBend(pitch.bend, channel);
+                this.MidiConnection.sendMidiNote(pitch.note!, channel, velocity, sustain);
+                if(pitch.bend) this.MidiConnection.sendPitchBend(8192, channel);
+            });
+        } else if(node instanceof Rest) {
+            // do nothing for now ...
+        }
     }
 
     public sysex(data: Array<number>): void {
diff --git a/yarn.lock b/yarn.lock
index 85773aa..17ac5c7 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -634,11 +634,6 @@ lines-and-columns@^1.1.6:
   resolved "https://registry.npmjs.org/lines-and-columns/-/lines-and-columns-1.2.4.tgz"
   integrity sha512-7ylylesZQ/PV29jhEDl3Ufjo6ZX7gCqJr5F7PKrqc93v7fzSymt1BpwEU8nAUXs8qzzvqhbjhK5QZg6Mt/HkBg==
 
-lru-cache@^10.0.0:
-  version "10.0.1"
-  resolved "https://registry.npmjs.org/lru-cache/-/lru-cache-10.0.1.tgz"
-  integrity sha512-IJ4uwUTi2qCccrioU6g9g/5rvvVl13bsdczUUcqbciD9iLr095yj8DQKdObriEvuNSx325N1rV1O0sJFszx75g==
-
 merge2@^1.3.0:
   version "1.4.1"
   resolved "https://registry.npmjs.org/merge2/-/merge2-1.4.1.tgz"
@@ -993,11 +988,13 @@ yaml@^2.1.1:
   resolved "https://registry.npmjs.org/yaml/-/yaml-2.3.1.tgz"
   integrity sha512-2eHWfjaoXgTBC2jNM1LRef62VQa0umtvRiDSk6HSzW7RvS5YtkabJrwYLLEKWBc8a5U2PTSCs+dJjUTJdlHsWQ==
 
-"zifferjs@github:amiika/zifferjs":
+"zifferjs@file:../zifferjs":
   version "0.0.0"
-  resolved "git+ssh://git@github.com/amiika/zifferjs.git#022a8297313c37402434ad728db38641442e4659"
+  resolved "file:../zifferjs"
   dependencies:
+    "@types/seedrandom" "^3.0.5"
     lru-cache "^10.0.0"
+    seedrandom "^3.0.5"
 
 zzfx@^1.2.0:
   version "1.2.0"