Single-Interval Audio Trimmer
Trim local audio with waveform handles, linear fades and selection playback; export PCM16 WAV.
About this single-interval audio trimmer
Trim local audio with waveform handles, linear fades and selection playback; export PCM16 WAV Processes streaming audio and video buffers directly in the browser using HTML5 Media and Web Audio APIs with zero server uploads.
Audio and video decoding pipeline
The execution engine processes input tokens and applies transformations in the browser sandbox. Specifically, Choose audio, drag the two waveform handles or enter start/end seconds. Arrow keys move one sample; Shift moves 0.1 seconds. With a handle focused, Space plays or stops the selection. Export includes all decoded channels.
Worked media transformation example
Scenario: Example file: /examples/audio-stereo.wav; Download the example file and select it in the file input. Set the visible controls to: Start (seconds) = 0.25; End (seconds) = 1.25 Click “Process locally”. Download the result and inspect: czoa-audio-trimmer.wav — PCM16; 48000 Hz; 2 channels; 48000 frames
Sample input:
Processing: Converts start and end seconds to sample positions at 48 kHz, keeps the half-open interval [start, end), and exports the retained channels as PCM16 WAV.
Illustrative output:
Buffer duration & codec support limits
Operational constraints and validation boundaries: Files must be smaller than 150 MB (150,000,000 bytes). MP3/WAV/AAC/OGG support depends on the browser. Decoding uses 48 kHz; export is PCM16 WAV. The waveform shows the first channel. Near-limit memory and physical audio output are unverified.
Audio and video rendering in Single-Interval Audio Trimmer depends on browser hardware and supported media codecs. Verify playback compatibility on your target platforms.
In-memory audio-video processing boundary
File buffers and document assets in Single-Interval Audio Trimmer are processed in-memory via local browser APIs with zero file uploads to CZOA servers.
HTML5 Media & Web Audio standards
W3C Web Audio API specifications and HTML5 media container standards:
Single-Interval Audio Trimmer verification · Audit standards
How to use it
- Enter, paste, or select your input data into the Single-Interval Audio Trimmer workspace controls.
- Review parameter fields, units, or options configured for Single-Interval Audio Trimmer.
- Click the action button or observe immediate live calculations rendered by Single-Interval Audio Trimmer.
Frequently asked questions
Single-Interval Audio Trimmer+
Choose audio, drag the two waveform handles or enter start/end seconds.
Fade in (seconds)+
Fades are linear in sample amplitude; overlapping fades multiply. Each fade must fit the selection. Positive fades reach zero at their outer endpoint; a one-sample fade silences that endpoint. End is exclusive; times map to whole sample frames.
Choose audio+
Files must be smaller than 150 MB (150,000,000 bytes).
How does Audio Trimmer & Cutter configure create wav?+
Select 0.25–0.75 seconds from a 48 kHz recording: 24,000 frames. A 0.1-second fade spans 4,800 frames, including its zero and full-amplitude endpoints.