AudioLens: listen to audio and inspect waveforms and spectrograms in VS Code

Description and use

AudioLens lets developers listen to and inspect audio waveforms and spectrograms within VS Code, offering channel isolation, measurement tools, and support for remote and raw PCM workflows.

Problem

Developers need to listen to and analyze audio files directly within VS Code while working on code, transcripts, manifests, or model outputs.

Outcome

AudioLens streamlines audio inspection within VS Code, reducing context switching and supporting advanced analysis features such as multi‑channel isolation and spectrogram customization.

Workflow

• Open an audio file in VS Code
• Press Space to play or pause
• Seek or drag a time selection to play a region
• Use Mute/Solo and per‑channel gain/pan to isolate channels
• Toggle waveform, spectrogram, or both views
• Adjust spectrogram controls (FFT size, window, frequency scale, range, color palette)
• Drag a region to view measurements (RMS, peak, clipping ratio, dominant frequency, spectral centroid)
• Use Remote SSH to preview audio in a remote workspace
• Specify raw PCM parameters (sample rate, channel count, encoding, byte order, offset)
• Hover over a supported audio path in a manifest or log file and choose Open in AudioLens
• Open Kaldi WAV Ark entries for inspection

Evidence

AudioLens lets you listen to audio, inspect waveforms, and analyze spectrograms directly in VS Code

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Open an audio file with AudioLens and press Space to play or pause

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For multi-channel recordings, each channel has its own track. Use Mute and Solo to isolate what you hear

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The spectrogram uses STFT analysis and exposes controls for FFT size, window function, frequency scale, displayed frequency range, and color palette

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Drag a region to inspect the active channel's measurements, including RMS, sample peak, clipping ratio, dominant frequency, and spectral centroid

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AudioLens also supports workflows that come up in speech and audio development: Remote SSH, Raw PCM, Manifest and log files, Kaldi WAV Ark

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