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I have the following code to play mp3: 

audioPlayer = new SuperpoweredAdvancedAudioPlayer(&audioPlayer, playerEventCallbackA, samplerate, 0); 

audioPlayer->open(path, 0, fileLength); 

audioSystem = new SuperpoweredAndroidAudioIO(samplerate, buffersize, false, true, audioProcessing, this, -1, SL_ANDROID_STREAM_MEDIA, 0); 

……………

bool silence = !audioPlayer->process(stereoBuffer, false, numberOfSamples); 

if (!silence) { 

  // The stereoBuffer is ready now, let’s put the finished audio into the requested buffers. 

  SuperpoweredFloatToShortInt(stereoBuffer, output, numberOfSamples); 

 }

And I have the following code to connect to usb card: 

int r = SuperpoweredUSBSystem::onConnect(deviceID, fd, (unsigned char *) rd, env->GetArrayLength(rawDescriptor)); 

if (r & 1) { 

  SuperpoweredUSBAudio::easyIO(deviceID, 44100, 16, 0, 256, SuperpoweredUSBLatency_Low, this, audioProcessing); 

  }

Please help me to know - how to sound from the player on a usb card?

Thank you.

zephyr
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Artem Baranov
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1 Answers1

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Both SuperpoweredAndroidAudioIO and SuperpoweredUSBAudio uses an audio callback. Put your player code into the SuperpoweredUSBAudio's audio processing callback. I see that both callback are called audioProcessing in your example.

Gabor Szanto
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