diff --git a/js/balloons-and-static-electricity/view/BalloonNode.js b/js/balloons-and-static-electricity/view/BalloonNode.js
index 136f9ee4..6277bfc9 100644
--- a/js/balloons-and-static-electricity/view/BalloonNode.js
+++ b/js/balloons-and-static-electricity/view/BalloonNode.js
@@ -30,9 +30,9 @@ import PitchedPopGenerator from '../../../../tambo/js/sound-generators/PitchedPo
 import SoundClip from '../../../../tambo/js/sound-generators/SoundClip.js';
 import soundManager from '../../../../tambo/js/soundManager.js';
 import Utterance from '../../../../utterance-queue/js/Utterance.js';
-import grabBalloonSound from '../../../sounds/balloon-grab-004_mp3.js';
+import grabBalloonSound from '../../../sounds/balloon-grab-006_mp3.js';
 import balloonHitsSweaterSound from '../../../sounds/balloon-hit-sweater_mp3.js';
-import releaseBalloonSound from '../../../sounds/balloon-release-004_mp3.js';
+import releaseBalloonSound from '../../../sounds/balloon-release-006_mp3.js';
 import balloonHitsWallSound from '../../../sounds/wall-contact_mp3.js';
 import balloonsAndStaticElectricity from '../../balloonsAndStaticElectricity.js';
 import BASEA11yStrings from '../BASEA11yStrings.js';
diff --git a/sounds/balloon-grab-004.mp3 b/sounds/balloon-grab-004.mp3
deleted file mode 100644
index 848e5f5b..00000000
Binary files a/sounds/balloon-grab-004.mp3 and /dev/null differ
diff --git a/sounds/balloon-grab-004_mp3.js b/sounds/balloon-grab-004_mp3.js
deleted file mode 100644
index f1b8ca36..00000000
--- a/sounds/balloon-grab-004_mp3.js
+++ /dev/null
@@ -1,21 +0,0 @@
-/* eslint-disable */
-import asyncLoader from '../../phet-core/js/asyncLoader.js';
-import base64SoundToByteArray from '../../tambo/js/base64SoundToByteArray.js';
-import WrappedAudioBuffer from '../../tambo/js/WrappedAudioBuffer.js';
-import phetAudioContext from '../../tambo/js/phetAudioContext.js';
-
-const soundURI = 'data:audio/mpeg;base64,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';
-const soundByteArray = base64SoundToByteArray( phetAudioContext, soundURI );
-const unlock = asyncLoader.createLock( soundURI );
-const wrappedAudioBuffer = new WrappedAudioBuffer();
-const onDecodeSuccess = decodedAudio => {
-  wrappedAudioBuffer.audioBufferProperty.set( decodedAudio );
-  unlock();
-};
-const onDecodeError = decodeError => {
-  console.warn( 'decode of audio data failed, using stubbed sound, error: ' + decodeError );
-  wrappedAudioBuffer.audioBufferProperty.set( phetAudioContext.createBuffer( 1, 0, phetAudioContext.sampleRate ) );
-  unlock();
-};
-phetAudioContext.decodeAudioData( soundByteArray.buffer, onDecodeSuccess, onDecodeError );
-export default wrappedAudioBuffer;
\ No newline at end of file
diff --git a/sounds/balloon-grab-006.mp3 b/sounds/balloon-grab-006.mp3
new file mode 100644
index 00000000..a98c4dcb
Binary files /dev/null and b/sounds/balloon-grab-006.mp3 differ
diff --git a/sounds/balloon-grab-006_mp3.js b/sounds/balloon-grab-006_mp3.js
new file mode 100644
index 00000000..7565a833
--- /dev/null
+++ b/sounds/balloon-grab-006_mp3.js
@@ -0,0 +1,21 @@
+/* eslint-disable */
+import asyncLoader from '../../phet-core/js/asyncLoader.js';
+import base64SoundToByteArray from '../../tambo/js/base64SoundToByteArray.js';
+import WrappedAudioBuffer from '../../tambo/js/WrappedAudioBuffer.js';
+import phetAudioContext from '../../tambo/js/phetAudioContext.js';
+
+const soundURI = 'data:audio/mpeg;base64,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';
+const soundByteArray = base64SoundToByteArray( phetAudioContext, soundURI );
+const unlock = asyncLoader.createLock( soundURI );
+const wrappedAudioBuffer = new WrappedAudioBuffer();
+const onDecodeSuccess = decodedAudio => {
+  wrappedAudioBuffer.audioBufferProperty.set( decodedAudio );
+  unlock();
+};
+const onDecodeError = decodeError => {
+  console.warn( 'decode of audio data failed, using stubbed sound, error: ' + decodeError );
+  wrappedAudioBuffer.audioBufferProperty.set( phetAudioContext.createBuffer( 1, 0, phetAudioContext.sampleRate ) );
+  unlock();
+};
+phetAudioContext.decodeAudioData( soundByteArray.buffer, onDecodeSuccess, onDecodeError );
+export default wrappedAudioBuffer;
\ No newline at end of file
diff --git a/sounds/balloon-release-004.mp3 b/sounds/balloon-release-004.mp3
deleted file mode 100644
index 084a4e50..00000000
Binary files a/sounds/balloon-release-004.mp3 and /dev/null differ
diff --git a/sounds/balloon-release-004_mp3.js b/sounds/balloon-release-004_mp3.js
deleted file mode 100644
index d91a023c..00000000
--- a/sounds/balloon-release-004_mp3.js
+++ /dev/null
@@ -1,21 +0,0 @@
-/* eslint-disable */
-import asyncLoader from '../../phet-core/js/asyncLoader.js';
-import base64SoundToByteArray from '../../tambo/js/base64SoundToByteArray.js';
-import WrappedAudioBuffer from '../../tambo/js/WrappedAudioBuffer.js';
-import phetAudioContext from '../../tambo/js/phetAudioContext.js';
-
-const soundURI = 'data:audio/mpeg;base64,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';
-const soundByteArray = base64SoundToByteArray( phetAudioContext, soundURI );
-const unlock = asyncLoader.createLock( soundURI );
-const wrappedAudioBuffer = new WrappedAudioBuffer();
-const onDecodeSuccess = decodedAudio => {
-  wrappedAudioBuffer.audioBufferProperty.set( decodedAudio );
-  unlock();
-};
-const onDecodeError = decodeError => {
-  console.warn( 'decode of audio data failed, using stubbed sound, error: ' + decodeError );
-  wrappedAudioBuffer.audioBufferProperty.set( phetAudioContext.createBuffer( 1, 0, phetAudioContext.sampleRate ) );
-  unlock();
-};
-phetAudioContext.decodeAudioData( soundByteArray.buffer, onDecodeSuccess, onDecodeError );
-export default wrappedAudioBuffer;
\ No newline at end of file
diff --git a/sounds/balloon-release-006.mp3 b/sounds/balloon-release-006.mp3
new file mode 100644
index 00000000..7f70c27c
Binary files /dev/null and b/sounds/balloon-release-006.mp3 differ
diff --git a/sounds/balloon-release-006_mp3.js b/sounds/balloon-release-006_mp3.js
new file mode 100644
index 00000000..8e00e439
--- /dev/null
+++ b/sounds/balloon-release-006_mp3.js
@@ -0,0 +1,21 @@
+/* eslint-disable */
+import asyncLoader from '../../phet-core/js/asyncLoader.js';
+import base64SoundToByteArray from '../../tambo/js/base64SoundToByteArray.js';
+import WrappedAudioBuffer from '../../tambo/js/WrappedAudioBuffer.js';
+import phetAudioContext from '../../tambo/js/phetAudioContext.js';
+
+const soundURI = 'data:audio/mpeg;base64,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';
+const soundByteArray = base64SoundToByteArray( phetAudioContext, soundURI );
+const unlock = asyncLoader.createLock( soundURI );
+const wrappedAudioBuffer = new WrappedAudioBuffer();
+const onDecodeSuccess = decodedAudio => {
+  wrappedAudioBuffer.audioBufferProperty.set( decodedAudio );
+  unlock();
+};
+const onDecodeError = decodeError => {
+  console.warn( 'decode of audio data failed, using stubbed sound, error: ' + decodeError );
+  wrappedAudioBuffer.audioBufferProperty.set( phetAudioContext.createBuffer( 1, 0, phetAudioContext.sampleRate ) );
+  unlock();
+};
+phetAudioContext.decodeAudioData( soundByteArray.buffer, onDecodeSuccess, onDecodeError );
+export default wrappedAudioBuffer;
\ No newline at end of file
diff --git a/sounds/license.json b/sounds/license.json
index d4542f16..a1065762 100644
--- a/sounds/license.json
+++ b/sounds/license.json
@@ -1,5 +1,5 @@
 {
-  "balloon-grab-004.mp3": {
+  "balloon-grab-006.mp3": {
     "text": [
       "Copyright 2002-2020 University of Colorado Boulder"
     ],
@@ -15,7 +15,7 @@
     "license": "contact phethelp@colorado.edu",
     "notes": "created by Ashton Morris (PhET Interactive Simulations)"
   },
-  "balloon-release-004.mp3": {
+  "balloon-release-006.mp3": {
     "text": [
       "Copyright 2002-2020 University of Colorado Boulder"
     ],