Focused audio workflows with visible codec and runtime limits
Inspect an audio track, choose the smallest required change, and load the compatibility worker only when you press start.
先打开最高意图工具
选择最接近当前任务的工具开始；完整 Hub 仍保留在下方，方便继续深入处理。
全部工具
Trim Audio
Cut an audio file to a selected start and end time.
Convert Audio
Convert browser-readable audio to MP3, WAV, or Ogg Vorbis.
Merge Audio
Join compatible audio files in selected order without adding a transition.
Change Audio Speed
Change audio tempo from 0.5× to 2× while keeping pitch near the source.
Extract Audio from Video
Export the primary audio track from a video as MP3 or WAV.
Media Info
Inspect container, duration, dimensions, rotation, codecs, channels, and sample rate.
Audio files stay in the tab and its worker; TOOLGRID does not expose a server-side audio upload or processing API.
Use MP3 for compact delivery, WAV for an uncompressed working copy, or Ogg when that container matches the playback environment.
Every encoding job exposes loading, progress, error, retry, and worker termination rather than leaving a tab in an unknown state.
Fast merge requires compatible tracks, lossy conversion cannot restore detail, and tempo processing can introduce audible artifacts.
常见问题
Is audio uploaded?
No. Selected files are processed in the browser worker and are not submitted to a TOOLGRID processing endpoint.
Should I choose MP3 or WAV?
MP3 is smaller and widely playable but lossy. WAV is much larger and useful as an uncompressed intermediate. Converting an already lossy source to WAV does not restore lost detail.
Why can merge fail?
The fast concat path expects matching codec, sample rate, channel layout, and container characteristics. Convert sources to one shared preset before merging when they differ.
Does speed change preserve pitch perfectly?
The tempo filter aims to keep pitch near the source for 0.5× to 2× changes, but artifacts can occur. This is not a music-grade time-stretching workstation.