Audio Joiner

• An audio joiner on a real timeline

  Most joiner sites give you a file list and a single button, and you find the mistakes after downloading. EchoWave puts every clip on a magnetic multi-track timeline, so you can hear exactly where one recording hands off to the next, nudge the order, and play the full sequence before you render anything.

• Fades at every seam

  Set a fade out on the tail of one clip and a fade in on the head of the next. That softens the hard cut between recordings made in different rooms on different days. To be precise: these are per-clip fades on each side of the join, not an automatic crossfade that overlaps the two tracks.

• Trim the dead air before you join

  Cut the throat-clearing at the start of a take and the silence at the end so each join lands tight. The audio trimmer and MP3 cutter run on this same timeline, so trimming and joining happen in one project instead of two round trips through separate tools.

• Mix MP3, WAV and M4A in one project

  No need to convert everything to a common format first. Drop mixed formats straight onto the timeline and pick one output format at export. EchoWave also reads MP4, MOV, WebM and AVI, so you can pull the audio out of a video recording and join it with your other clips.

• Add a layer if you change your mind

  Because the timeline is multi-track, a joined sequence can still take a second layer later, a quiet music bed under a spoken intro, say. At that point you have crossed from joining into mixing, which is exactly what the audio merger page walks through.

• Stingers between segments

  A categorized sound effects panel with 30 packs sits inside the editor, useful for a swoosh or chime between podcast segments. One honest caveat: there is no stock music library, so bring your own music files for beds and outros.

• Export one clean file

  On the free plan you can render the joined sequence as an HD MP4 with a small removable EchoWave watermark badge. Audio-only formats come with paid plans: MP3 and M4A on Basic, WAV and FLAC on Pro. Rendering happens on a cloud render farm, so a two-hour joined file renders the same way on an old laptop as on a new desktop.

• Turn the joined track into a video

  The same project can become a post. Put one of 93 music visualizer styles or an audiogram over your joined track, add AI captions if there is speech, and export an MP4 for YouTube or social feeds. Handy when a podcast episode needs a promo clip.

1. 1

   Upload your clips

   Drag MP3, WAV or M4A files into the editor, or browse for them on your device. Each file lands on the timeline as its own clip, ready to move.

2. 2

   Arrange the order

   Drag clips left and right until the sequence is right. The magnetic timeline snaps each clip flush against the previous one, so there are no accidental gaps or overlaps.

3. 3

   Fade the joins

   Add a fade out at the end of each clip and a fade in at the start of the next. Park the playhead just before a join and hit play to check how the handoff sounds.

4. 4

   Export a single file

   Render an HD MP4 free with a small watermark badge, or pick an audio-only format on a paid plan: MP3 and M4A on Basic, WAV and FLAC on Pro. The cloud does the encoding and hands you back one file to download.

• Podcast episodes from segments

  Join a cold open, interview, ad read and outro that were recorded separately. Drop a stinger from the sound effects panel between segments so transitions feel produced.

• One long file for workouts or parties

  Combine a folder of songs into a single MP3 that plays straight through with no app shuffling tracks. Fades at each join keep the changeovers from jarring.

• Audiobook and narration chapters

  Narrators rarely record a book in one sitting. Join chapter takes in order, trim the slate and retake fumbles at each boundary, and export one continuous file per chapter or per book.

• Split recordings made whole again

  Phones and recorder apps often split long sessions into multiple files. Join the parts of a meeting, lecture or interview back into one recording before archiving or transcribing it.

• Language and study audio

  Stitch vocabulary drills, lecture halves or sermon parts into one file that plays in order. Easier to revisit on a commute than a folder of fragments.

• Demos and song sketches

  Join a verse idea, a chorus take and a bridge sketch into one listening pass for bandmates. Reorder the clips to try different structures before anyone opens a DAW.

Based on each tool's public pages as of July 2026. Plans and features change, so double-check anything that matters before you commit.