Audio Processing on GPU

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Audio Processing on GPU

• Project Update Presentation
• COMP 790-058
• Anish Chandak
• achandak_at_cs.unc.edu

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Problem Statement

• Audio Processing Creating, encoding, editing and
  decoding digital audio.
• Implement various audio processing algorithms on
  GPU and compare them with CPU or hardware
  accelerated implementations.
• Attempt will be on implementing an audio pipeline
  on GPU.

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Why Audio Processing?

• Games
• 3D Audio
• Reverberations
• Doppler Effect
• Multiple Sources
• Environment Effects

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Why Audio Processing?

• Audio creation
• Audio Mixing
• Sound Effects
• Entertainment
• Surround sound
• HD Audio

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Audio Pipeline
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So far

• SRC Sample Rate Converter
• VoIP 8KHz
• Audio CD 44.1 KHz
• HD-Audio/DVD-Audio 96 KHz
• Linear Interpolation
• Polyphase Filter

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So far

• Mixer Mixes input from different sources.
• Tried maximum number of sources that can be
  mixed.
• Sound Blaster denotes 10 of its processing power
  to mixing.
• Audigy ZS 2 on my laptop can mix sounds from CD
  microphone wave file and on top of it
  left-right control.

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Results(sources vs. latency)
16x16
32x32
64x64
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To Do

• GPU Audio Pipeline
• Implement other modules of the pipeline. And
  implement audio processing algorithms on top of
  them.
• CPU implementations and comparison.

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Thanks