This browser utility combines multiple audio tracks into a continuous audio file. Whether assembling podcast interview segments with intro and outro bumpers, stitching voice memos, or assembling track medleys, the tool executes sample concatenation in local browser memory.

### Processing Architecture The tool uses the HTML5 Web Audio API to concatenate tracks without re-encoding quality degradation:

- **File Ingestion:** Select two or more audio files (such as WAV or MP3). Each track is read into memory as an ArrayBuffer. - **Buffer Decoding:** The browser's `AudioContext.decodeAudioData()` decodes the raw audio into floating-point PCM samples. - **Sample Concatenation:** The tool calculates the total sample count across all inputs, allocates an uncompressed `AudioBuffer`, and copies each channel's PCM samples sequentially. - **WAV Generation:** The combined audio buffer is encoded into standard 16-bit PCM WAV binary data, creating a downloadable audio blob.

### Worked Example Suppose a podcaster wants to assemble an episode from two components: 1. **Track 1:** `intro_bumper.wav` (15 seconds, 44,100 Hz stereo, 661,500 samples). 2. **Track 2:** `main_interview.mp3` (180 seconds, 44,100 Hz stereo, 7,938,000 samples).

**Merge Sequence:** - The Web Audio engine decodes both tracks into memory. - A new master audio buffer is allocated with $661,500 + 7,938,000 = 8,599,500$ sample frames. - Channel 0 and Channel 1 samples from the intro are copied first, followed immediately by the interview samples. - The tool renders a unified 195-second WAV file ready for instant playback in the preview player.

### Privacy and Local Execution All audio decoding, channel buffer stitching, and WAV encoding occur 100% locally on your computer using the Web Audio API. Your audio files are never uploaded to any remote server or third-party cloud service.