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You're working with audio — recording a podcast, editing a music track, or processing sound effects. The file is a WAV because that's what professional audio workflows run on. No compression, no quality decisions, just the raw signal captured sample by sample.
WAV stores audio as uncompressed PCM data, which means the file is a direct representation of the sound wave. Nothing is discarded, nothing is approximated, nothing degrades when you re-save. That fidelity comes at a cost: about 10 MB per minute of stereo audio at CD quality (44.1 kHz, 16-bit). A three-minute song weighs 30 MB as WAV versus 5 MB as MP3. This is why WAV is the format you record and edit in, not the format you distribute in.
Every media player on every platform opens WAV. For music production, your DAW (Logic, Ableton, Pro Tools, Audacity) works natively in WAV. When you're done editing, export to MP3 for distribution, FLAC for lossless archiving, or AAC if your audience is primarily on Apple devices. WAV is the starting point, not the endpoint.
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