What is AAC (Advanced Audio Coding)?
AAC is a standard audio file format that offers better sound quality than MP3 at the same bitrate. It is the preferred audio format for Apple Podcasts and iTunes.
Why AAC (Advanced Audio Coding) Matters for Podcasters
Advanced Audio Coding (AAC) is a lossy digital audio compression standard designed to be the successor to the MP3 format. While MP3 is the most universally compatible format, AAC generally achieves better sound quality at similar bitrates, making it highly efficient for podcasting where file size and bandwidth costs matter. AAC is the native audio format for Apple devices and the preferred standard for Apple Podcasts. Most modern podcast hosting platforms accept AAC files (often with the .m4a extension). For podcasters, the debate usually comes down to compatibility versus quality; while AAC sounds better, MP3 is still technically safer for ensuring playback on very old devices or niche web browsers. However, in the modern era, AAC is widely supported and is an excellent choice for creators looking to maximize audio fidelity without bloating file sizes.
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Explore Production podcast tools →Related Terms
Audio Interface
An audio interface is a hardware device that connects professional XLR microphones to a computer, converting analog audio signals into digital data for recording.
Automatic Gain Control (AGC)
Automatic Gain Control (AGC) is a feature in recorders or software that automatically adjusts the volume levels to keep the audio consistent, boosting quiet sounds and lowering loud ones.
Background Music (Music Bed)
Background music, or a 'music bed,' is instrumental audio played underneath the spoken dialogue to set the mood, pace, or tone of a podcast segment.
Background Noise / Noise Floor
Background noise (also called noise floor) is the unwanted ambient sound present in your recording, such as air conditioning hum, computer fan noise, or room echo. It can distract listeners and make your podcast sound unprofessional.