Convert MP4 to AAC

AAC is the next generation after MP3 - it produces better sound quality at the same file size. When you extract audio from videos, AAC preserves more detail and handles complex sounds like orchestral music better than MP3. It's especially noticeable at lower bitrates - a 128kbps AAC file often sounds as good as a 192kbps MP3. AAC also supports multichannel audio and better handling of stereo positioning.

Yes, AAC has good compatibility across modern devices. It works natively on Apple products (iPhone, iPad, Mac), Android devices, smart speakers, most modern TVs, and most software media players. It's the standard format for YouTube, iTunes, and many streaming services. Unless you're dealing with very old equipment, AAC files will play on most devices.

For most content, 128kbps provides a good balance of quality and file size - this is what many streaming services use. If you're extracting high-quality music and have space to spare, 192kbps or 256kbps gives you high quality that's close to uncompressed audio for most listeners. For voice-dominant content like lectures or interviews, you can go as low as 96kbps or even 64kbps and still keep good clarity while creating small files.

AAC works well for both. It was designed to handle a wide range of audio content. For music, it preserves stereo imaging and frequency response better than older formats. For speech, AAC's advanced psychoacoustic modeling keeps voices clear and natural even at lower bitrates. This versatility makes it good when you're extracting mixed content from videos - whether it's music videos, vlogs with background music, podcasts, or interviews, AAC adapts well to different audio types.

While professional audio production typically uses uncompressed formats (like WAV or AIFF) for working files, AAC is accepted as a high-quality delivery format. Many professionals use AAC for client previews, portfolio samples, or final distribution when uncompressed formats aren't practical. At high bitrates (256kbps or higher), AAC quality is good enough for most professional applications where the priority is distributing finished content rather than further editing.