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Audio Only Test Content

This page provides a collection of audio-only test content that can be used to validate PlayReady functionality with audio streams. These test files are designed to help developers and integrators test their PlayReady implementations with various audio encoding formats.

Overview

The audio-only test content collection includes:

  • AAC-LC encoded audio - Standard AAC Low Complexity audio files
  • AAC-HE encoded audio - High Efficiency AAC audio files
  • PIFF encryption - Protected Interoperable File Format with AES128-CTR encryption
  • Smooth Streaming manifests - Both protected and clear versions

All content uses PlayReady WRMHEADER version 4.0 and is encrypted using PIFF (Protected Interoperable File Format) with AES128-CTR encryption.

Audio Test Content Collection

AAC-LC Audio Content

Taxi3 AAC-LC Audio (Smooth Streaming)

Property Value
Tool Chain Smooth Protect (IIS Media Transform)
Creation Date 01 February 2010
Video Encoding Settings None
Audio Encoding Settings AAC-LC
Encryption Settings PIFF Encryption AES128-CTR
Multi DRM False
PlayReady WRMHEADER 4.0
Smooth Streaming Manifest (Protected) https://test.playready.microsoft.com/media/profficialsite/Taxi3_AACLCPR.ism/manifest
Smooth Streaming Manifest (Clear) https://test.playready.microsoft.com/media/profficialsite/Taxi3_AACLC.ism/manifest

AAC-HE Audio Content

Taxi3 AAC-HE Audio (Smooth Streaming)

Property Value
Tool Chain Smooth Protect (IIS Media Transform)
Creation Date 01 February 2010
Video Encoding Settings None
Audio Encoding Settings AAC-HE
Encryption Settings PIFF Encryption AES128-CTR
Multi DRM False
PlayReady WRMHEADER 4.0
Smooth Streaming Manifest (Protected) https://test.playready.microsoft.com/media/profficialsite/Taxi3_AACHEPR.ism/manifest
Smooth Streaming Manifest (Clear) https://test.playready.microsoft.com/media/profficialsite/Taxi3_AACHE.ism/manifest

Technical Details

Audio Encoding Specifications

AAC-LC (Advanced Audio Coding - Low Complexity)

  • Format: AAC Low Complexity profile
  • Use Case: General purpose audio compression
  • Compatibility: Widely supported across devices and platforms
  • Efficiency: Good compression ratio with moderate computational requirements

AAC-HE (Advanced Audio Coding - High Efficiency)

  • Format: AAC High Efficiency profile
  • Use Case: Low bitrate audio streaming
  • Compatibility: Supported by most modern audio decoders
  • Efficiency: Excellent compression for low bitrate scenarios

Encryption Details

PIFF (Protected Interoperable File Format)

  • Encryption Algorithm: AES128-CTR
  • Key Management: PlayReady DRM system
  • Compatibility: ISO/IEC 23001-7 compliant
  • Interoperability: Works with DASH and Smooth Streaming

Usage Guidelines

Testing Scenarios

  1. Audio-Only Playback Testing

    • Verify PlayReady license acquisition for audio content
    • Test audio decryption and playback
    • Validate audio quality and synchronization

  2. Format Compatibility Testing

    • Test AAC-LC decoding capabilities
    • Verify AAC-HE playback support
    • Validate PIFF container handling

  3. Streaming Protocol Testing

    • Test Smooth Streaming manifest parsing
    • Verify adaptive bitrate switching for audio
    • Test protected vs. clear content handling

Implementation Notes

  • License Acquisition: Ensure your PlayReady client can handle audio-only content licenses
  • Decoder Support: Verify AAC-LC and AAC-HE decoder availability
  • Container Parsing: Implement proper PIFF container parsing for encrypted audio
  • Error Handling: Test with both protected and clear versions for comparison

Testing Recommendations

Basic Audio Playback

  1. Start with clear content to verify basic audio playback
  2. Test protected content to validate DRM integration
  3. Compare audio quality between protected and clear versions

Advanced Testing

  1. Test with different audio output configurations
  2. Verify playback across various sample rates
  3. Test interrupt handling during audio playback

Compatibility Testing

  1. Test on different audio hardware configurations
  2. Verify performance with various AAC decoder implementations
  3. Test integration with audio processing pipelines

Troubleshooting

Common Issues

Audio Playback Failures

  • Cause: Missing AAC decoder support
  • Solution: Ensure proper AAC-LC and AAC-HE decoder installation

License Acquisition Errors

  • Cause: Incorrect PlayReady client configuration
  • Solution: Verify license server URLs and client certificates

Format Compatibility Issues

  • Cause: Unsupported PIFF container features
  • Solution: Update container parsing libraries

Debug Steps

  1. Verify Clear Content Playback

    Test with clear audio files first to isolate DRM issues

  2. Check License Acquisition

    Monitor PlayReady license requests and responses

  3. Validate Audio Decoding

    Test AAC decoder functionality independently

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