UTUVO Labs · Free · MIT open source

UTUVO Peek

Press Space. See, hear and measure your audio.

Select an audio file in Finder and press Space. Preview and play it, inspect its loudness, and see each channel without opening a DAW.

Download for Mac Watch the tutorial

Version 0.2.0 · macOS 14 or later · Apple Silicon · Apple notarized

Peek Channels view of a 7.1.4 demo file, with labelled waveforms, meters and loudness. — Real Peek captures using synthetic demo audio. Meter values shown are fixed illustrations.

One audio file, a clearer view.

Loudness at a glance

Integrated loudness, LRA, per-channel True Peak and Sample Peak, calculated locally.

Waveform · Channels · Spectrum

Switch between the overall waveform, labelled channel lanes and a frequency spectrum. Each channel has a live meter during playback.

Preview and play

Playback starts when the preview opens and stops when it closes. Supported multichannel layouts play directly through enough interface outputs, or through Apple HRTF binaural on headphones.

Delivery details

Inspect duration, sample rate, bit depth, channel layout, BWF time reference and iXML project details. Peek identifies ADM, Dolby dbmd and RF64 metadata.

Peek Waveform view of a stereo demo file. — Waveform

Peek Spectrum view of a multichannel demo file. — Spectrum

See Peek in Finder.

2:12 tutorial with Traditional Chinese AI narration and captions. Demo audio is synthetic; Finder scenes and meter values are illustrations.

Install and open Peek once, select an audio file in Finder and press Space. Use Waveform, Channels or Spectrum; open Details for recording metadata. Close the preview to stop playback.

Free, open source, ready for your Mac.

Version: 0.2.0
File size: 2.37 MB · 2,481,663 bytes
Requirements: macOS 14 or later · Apple Silicon · Apple notarized
Signing: Developer ID signed, Apple notarized and stapled

Drag UTUVO Peek to Applications, open it once and close it. Then select an audio file in Finder and press Space.

If Finder still uses its original preview, check that UTUVO Peek is enabled in the macOS Quick Look extension settings.

Download for Mac Source code (MIT)

SHA-256 checksum
353c7e85a159687f2cfbc9b76b463d79dc57970918d15c450d99434cd1c62ff3

Formats, privacy and limits.

WAV / BWF / RF64 · AIFF / AIFF-C · CAF · FLAC · MP3 · AAC / M4A

All audio calculations happen on your Mac. Peek does not connect to a network or collect analytics; its sandboxed Quick Look extension only reads the file Finder passes to it.

ADM is identified, not object-rendered: tracks play as channel-based audio.
Files with more than 24 channels display the first 24 lanes.
Headphone playback supports 3.0, Quad, 5.1, 7.1, 7.1.2 and 7.1.4. Other channel counts require enough interface outputs.
Loudness is measured automatically for files up to roughly 30 minutes of stereo-equivalent audio. For longer files, press Measure loudness.