What is Signal-to-Noise Ratio?
Signal-to-Noise Ratio (SNR) compares the level of the desired sound (your voice) to the level of background noise. A higher ratio means a cleaner, professional recording.
Why Signal-to-Noise Ratio Matters for Podcasters
In audio, you want a 'high' signal-to-noise ratio. This means the 'Signal' (your voice) is very loud compared to the 'Noise' (hiss, hum, traffic). If you record a whisper in a noisy room, the SNR is low (bad). If you shout in a quiet studio, the SNR is high (good). You improve SNR by: 1) Getting closer to the microphone (increasing signal), 2) Speaking louder (increasing signal), and 3) Treating the room or turning off fans (decreasing noise). It is the fundamental metric of audio fidelity.
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ID3 Tags
ID3 tags are metadata embedded directly into MP3 audio files that store information like the episode title, artist name, album name, and cover art. They help podcast players display the correct information about your episodes.
Metadata
Metadata is descriptive information about your podcast episode that helps platforms, players, and search engines understand what your content is about. It includes titles, descriptions, tags, and embedded file information.
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.
Transcription
Transcription is the process of converting spoken audio into written text. For podcasters, transcriptions make content accessible, improve SEO, and enable repurposing into blog posts or social media content.