This week we talked about audio formats and recording in preparation of the podcast project.
There are a number of different audio formats, which can store audio information uncompressed or compressed, and the latter in loseless (original can be restored) or lossy (reduces file size a lot, but original can’t be restored) compression.
- .mp3 (MPEG-2 Audio Layer III) is the most common and standard for playing music digitally. It uses lossy compression to reduce the file size.
- .wav (WAVE, Waveform Audio File Format) is the common format for storing uncompressed audio data on Windows
- .aiff (Audio Interchange File Format) is an uncompressed file format used mainly on Macs
- .ogg (OGG Vorbis) is an open-source audio format using lossy compression, intended as an alternative to the patented MP3
Now, things to pay attention to while recording an audio:
- If you record your audio with a manual recording device, the data has to be digitised first. This can be done through re-recording, which however always causes a certain loss in data.
- Be aware of the background noises in your surroundings. A bit of ambient noise can add to the atmosphere of your recording, but too much will distract from your actual content.
- Try to record in a room with limited flat surfaces, as sound bounces off these and can disturb your recording. Things like wall-paper, carpet and textured surfaces in general can help dampen down the noise.
Image Source: sherhaps.wordpress.com