Audio Converter Joiner

The Audio Converter Joiner merges multiple audio sources into a single file and optionally converts to a chosen format and bitrate. It serves podcasters, video editors, journalists, and content creators who need to assemble clips, soundtracks, or narration into one seamless track. It is used when you have several audio files in different formats or sample rates and require a single deliverable for distribution or publishing.
Core capabilities include input file list with explicit order, output format selection, and optional bitrate, sample rate, and channel configuration, with re-encoding during join. Advanced options include silence-gap insertion, simple normalization, and optional trimming before join. The tool reports duration, final size, and final format; all processing is non-destructive with respect to source files.
Inputs consist of input_files (array of file references, required), output_format (string, e.g., mp3, wav), bitrate_kbps (integer, optional), sample_rate_hz (integer, optional), channels (string, 'mono'|'stereo', optional), and file_order (array of indices, optional but recommended). Outputs include merged_audio (binary blob), duration_seconds (float), final_format (string), final_size_bytes (int). Validation ensures supported formats, non-empty input, and memory constraints.
The processor decodes each input to a common internal PCM representation, resamples to the configured sample_rate, converts to the target bitrate and channel layout, concatenates the streams in the specified order, and encodes the final stream to the target format. When input sample rates or channels differ, they are converted during encoding.
If inputs are missing or the target format is unsupported, the operation fails with a domain-specific error. If a single input fails to decode, that input is skipped; very long total duration may trigger memory-based limits. If the concatenation would exceed available bandwidth or storage, processing is aborted.
Uses standard audio formats (MP3, WAV, AAC, FLAC, OGG) and common sample rates (44.1 kHz, 48 kHz); units are metric; no region-specific constraints beyond exportability.
Assumes provided inputs are accessible and legitimate audio files; does not perform editing (effects, EQ), metadata editing beyond basic tagging, or streaming/packet-based workflows.