Downloading audio files

Binary Sampling rates and Bit rates

Bit rate

Bit rate is the number of bits processed in a certain amount of time; this is measured in megabits per second (Mbit/s) or kilobits per second (Kbit/s) or gigabits per second (Gbits/s) or terrabits per seconds (Tbits/s). This measures the quality of an audio file you are downloading by finding out how many bits per second are used to play the file.

Sampling rate

Sampling rate is the amount of times the music is sampled a second, it is measured in hertz. A low sample rate will have low quality as it is less accurate and samples the audio less(middle diagram in the picture). A high sample rate will sample the audio file lots so will get most of the frequency of the song and sound more like the song (the bottom diagram in the picture).

Sampling rate for devices

8'000 Hz: Telephone.


44'100 Hz: Audio CDs.


48'000 Hz: standard audio sampling rate used by professional digital video equipment.


96'000 Hz: Some DVD-Audio, Some BD-ROM (Blu-ray disc) audio tracks, Some HD DVD audio tracks and most pro audio gear.


192'000 Hz: Some DVD-Audio, Some BD-ROM (Blu-ray disc) audio tracks, Some HD DVD audio tracks and some pro audio gear.


5'644'800 Hz: Used in some professional DSD recorders.