WAV files are uncompressed and lossless, retaining every detail of the original recording with high fidelity but resulting in large file sizes (often 10x larger than MP3s). In contrast, MP3 files use lossy compression to drastically reduce size by discarding audio data deemed less audible, making them ideal for streaming and casual listening despite a slight loss in quality.
MP4 is technically a multimedia container that typically holds audio (often encoded as AAC, which is more efficient tha