Use the current HAL parameter name consistently.

Author: microbit-matt-hillsdon

src/board/audio/index.ts

@@ -59,8 +59,8 @@ export class Audio {
     );
   }
 
-  playSoundExpression(expression: string) {
-    const soundEffects = parseSoundEffects(replaceBuiltinSound(expression));
+  playSoundExpression(expr: string) {
+    const soundEffects = parseSoundEffects(replaceBuiltinSound(expr));
     const onDone = () => {
       this.stopSoundExpression();
     };

src/jshal.js

@@ -216,8 +216,8 @@ mergeInto(LibraryManager.library, {
     return board.microphone.soundLevel.value;
   },
 
-  mp_js_hal_audio_play_expression: function (data) {
-    return board.audio.playSoundExpression(UTF8ToString(data));
+  mp_js_hal_audio_play_expression: function (expr) {
+    return board.audio.playSoundExpression(UTF8ToString(expr));
   },
 
   mp_js_hal_audio_stop_expression: function () {

src/microbithal_js.c

@@ -451,8 +451,8 @@ bool microbit_hal_audio_is_expression_active(void) {
     return mp_js_hal_audio_is_expression_active();
 }
 
-void microbit_hal_audio_play_expression(const char *name) {
-    mp_js_hal_audio_play_expression(name);
+void microbit_hal_audio_play_expression(const char *expr) {
+    mp_js_hal_audio_play_expression(expr);
 }
 
 void microbit_hal_audio_stop_expression(void) {