Audio Codec
Software that encodes raw audio into a compressed format and decodes it back for playback (e.g. MP3, AAC, FLAC).
Technisches Detail
Audio audio codec algorithms exploit psychoacoustic masking — louder sounds make nearby quieter frequencies inaudible. MP3 (MPEG-1 Layer 3) uses the Modified Discrete Cosine Transform (MDCT) and was revolutionary in 1993. AAC improves on MP3 with better spectral resolution and support for more channels. Opus (RFC 6716) combines speech (SILK) and audio (CELT) codecs and is optimal for VoIP, streaming, and interactive applications with latency requirements under 20ms.
Beispiel
```javascript
// Audio Codec: Web Audio API example
const audioCtx = new AudioContext();
const response = await fetch('audio.mp3');
const buffer = await audioCtx.decodeAudioData(await response.arrayBuffer());
const source = audioCtx.createBufferSource();
source.buffer = buffer;
source.connect(audioCtx.destination);
source.start();
```
Verwandte Formate
Verwandte Tools
B
BPM Calculator
F
Frequency Calculator
D
Delay Time Calculator
D
dB Converter
A
Audio File Size Calculator
N
Note Frequency Chart
D
Decibel Reference Guide
L
Latency Calculator
C
Cents Calculator
L
Loudness Standards Guide
E
EQ Frequency Reference
S
Sample Rate Converter
B
Bit Depth Analyzer
C
Chord Reference
K
Key & Scale Reference
Verwandte Begriffe
Bitrate
Sample Rate
Codec
Waveform
Normalization
Channel
Clipping
Equalization
Noise Reduction
Fade
Reverb
Compression (Audio)
Bit Depth (Audio)
PCM
Mono
Stereo
FLAC
Spectrogram
Tempo
Pitch
Dynamic Range
Limiter
Delay
Chorus Effect
Noise Gate
De-esser
Sidechain
LUFS
RMS Level
Peak Level
Dithering (Audio)
Stereo Imaging
Mid-Side Processing
Frequency Spectrum
Harmonic Distortion
Nyquist Frequency
Aliasing (Audio)
Psychoacoustics
Crossfade
Loudness War
Audio Watermark
Spatial Audio
Audio Fingerprint
Video Codec