fix: nitro sound audio recording

Author: isekovanic

package/native-package/src/optionalDependencies/Audio.ts

@@ -111,6 +111,15 @@ class _Audio {
       audioSet: {
         // Android specific properties
         AudioEncoderAndroid: AudioEncoderAndroidType.AAC,
+        // Pin nitro-sound 0.2.10+'s bitrate to 128 kbps. Its `.high` quality
+        // preset otherwise defaults to (48 kHz, 2ch, 192 kbps), a combination
+        // the iOS hardware AAC encoder rejects with
+        // kAudioFormatUnsupportedDataFormatError ('fmt?', OSStatus 1718449215)
+        // in AppStore signed binaries.
+        // https://www.osstatus.com/search/results?search=1718449215
+        // Older nitro-sound and the legacy `react-native-audio-recorder-player`
+        // ignore this key.
+        AudioEncodingBitRate: 128000,
         AudioSourceAndroid: AudioSourceAndroidType.MIC,
         OutputFormatAndroid: OutputFormatAndroidType.AAC_ADTS,
 
@@ -121,6 +130,11 @@ class _Audio {
           ? AVModeIOSOptionNitroSound.spokenaudio
           : AVModeIOSOption.spokenaudio,
         AVNumberOfChannelsKeyIOS: 2,
+        // Pair with `AudioEncodingBitRate` above override nitro-sound 0.2.10+'s
+        // 48 kHz default back to 44.1 kHz so the encoder gets the combo that
+        // 0.2.9 was implicitly using. Idempotent for older nitro-sound and the
+        // legacy lib (their default is already 44.1 kHz).
+        AVSampleRateKeyIOS: 44100,
       },
       isMeteringEnabled: true,
     },

package/src/types/types.ts

@@ -501,6 +501,15 @@ type AVEncodingType =
 export interface AudioSet {
   AudioChannelsAndroid?: number;
   AudioEncoderAndroid?: AudioEncoderAndroidType;
+  /**
+   * Cross-platform bitrate hint introduced in `react-native-nitro-sound` 0.2.10+.
+   * Sits alongside the iOS-native `AVEncoderBitRateKeyIOS` because nitro-sound
+   * reads `AudioEncodingBitRate` on iOS (mapping it to `AVEncoderBitRateKey`),
+   * not the platform-specific key. Older nitro-sound builds and the legacy
+   * `react-native-audio-recorder-player` ignore this field, so it's safe to
+   * include unconditionally.
+   */
+  AudioEncodingBitRate?: number;
   AudioEncodingBitRateAndroid?: number;
   AudioSamplingRateAndroid?: number;
   AudioSourceAndroid?: AudioSourceAndroidType;