diff --git a/README.md b/README.md
index 35f6039..360932a 100644
--- a/README.md
+++ b/README.md
@@ -63,7 +63,7 @@ piano.load().then(() => {
 Once the samples are loaded, it exposes 4 methods for playing the notes:
 
 
-### `.keyDown({ note: string, time?: Time, velocity?: number })`
+### `.keyDown({ note: string|number, time?: Time, velocity?: number })`
 
 Press a note down on the piano. Optionally give it a time using Tone.js time notation or seconds relative to the AudioContext clock.
 
@@ -72,9 +72,12 @@ The velocity is a value between 0-1.
 ```javascript
 //play a 'C4' 1 second from now
 piano.keyDown({ note: 'C4', time: '+1' })
+
+//play a 'C4' via MIDI code
+piano.keyDown({ note: 60, time: '+1' })
 ```
 
-### `.keyUp({ note: string, time?: Time })`
+### `.keyUp({ note: string|number, time?: Time })`
 
 Release a note at the given time. 
 
diff --git a/src/piano/Piano.ts b/src/piano/Piano.ts
index 9bdc2f1..04b9833 100644
--- a/src/piano/Piano.ts
+++ b/src/piano/Piano.ts
@@ -259,9 +259,7 @@ export class Piano extends ToneAudioNode<PianoOptions> {
 
 			time = this.toSeconds(time)
 
-			if (isString(note)) {
-				midi = Math.round(Midi(note).toMidi())
-			}
+			midi = isString(note) ? Math.round(Midi(note).toMidi()) : note
 
 			if (!this._heldNotes.has(midi)) {
 				// record the start time and velocity
diff --git a/test/test.js b/test/test.js
index c9f561a..6853aa2 100644
--- a/test/test.js
+++ b/test/test.js
@@ -113,7 +113,7 @@ describe('Piano', async () => {
 			await piano.load()
 			piano.keyDown('C4')
 			piano.pedalDown('+0.2')
-			piano.keyUp('C4', '+0.5')
+			piano.keyUp(60, '+0.5')
 			piano.keyDown('D4', '+0.4')
 			piano.pedalUp('+3')
 		})
@@ -149,7 +149,7 @@ describe('Piano', async () => {
 			})
 			await piano.load()
 			piano.keyDown('C4')
-			piano.keyDown('E4')
+			piano.keyDown(64)
 			piano.keyDown('G4')
 			piano.pedalDown()
 			await new Promise(done => setTimeout(done, 100))