audio reseach

Key Digital Audio Terms

ADC – Analog to Digital Conversion

Going from an electrical signal from the mic to a digital file on the computer

SAMPLING – taking measurements of the electrical and turning them into a digital value. Takes a measurement 48000 times every second. 48khz which is called the sample rate.

CODEC – Compression – Decompression. Compressor – Decompressor Important for organising the data in the file so the computer knows what to do with it.

COMPRESSION – 3 types of copmpression

1 Uncompressed – .wav file ending
2 Compressed – Lossy compression – .mp3
3 Compressed – Lossless .FLAC

DAC – Digital to Analog.

CODEC decompresses or opens file for an application such as Winamp to play.

The soundcard turns the digital values back into electrical signals which can be amplified and played through a speaker.


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