![]() With wavesurfer.js you can create anything from an HTML5 audio player to a sophisticated DJ application. It therefore runs on most platforms, including Microsoft Windows, Mac OS X, Linux, Solaris, HP-UX, FreeBSD, and IRIX. wavesurfer.js is a customizable audio waveform visualization, built on top of Web Audio API and HTML5 Canvas. So the code might be like this: var originalBuffer var emptySegment. ![]() Wavesurfer is written in Tcl/Tk using the Snack audio library. Reading this answer suggests you can create an empty AudioBuffer of the size of the audio segment you want to copy (size length in seconds sample rate), then fill its channel data with the data from the segment. Note: You cannot add regions until the audio has finished loading, otherwise the start: and end: properties of the new region will be set to 0, or an unexpected value. See Region Options, Region Methods and Region Events below. ![]() Wavesurfer provides basic audio editing operations, such as excision, copying, pasting, zero-crossing adjustment, and effects such as fading, normalization, echo, inversion, reversal, replacement with silence, and DC-removal, but, in view of its scientific orientation, does not offer effects of interest to musicians such as flange. addRegion (options) Creates a region on the waveform. It can be adapted to various tasks including speech research and education, speech/sound analysis, and sound annotation/transcription. The Audio trimmer from offers unique features while trimming a clip from an audio uploaded. WaveSurfer is free software, distributed under a permissive free software licence. 'WaveSurfer' is a sound visualization/manipulation tool for novice and advanced users, with a simple and intuitive user interface. It can read and write a number of transcription file formats used in industrial speech research including TIMIT. It is a simple but fairly powerful program for interactive display of sound pressure waveforms, spectral sections, spectrograms, pitch tracks and transcriptions. WaveSurfer is an audio editor widely used for studies of acoustic phonetics.
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