Audio data Skills Set sample size and rate
- Slides: 12
Audio data Skills: Set sample size and rate in Audacity IT concepts: analog to digital conversion, digital to analog conversion, sample rate, sample size, quality-file size trade off This work is licensed under a Creative Commons Attribution-Noncommercial. Share Alike 3. 0 License.
Where does this topic fit? • Internet concepts – Applications – Technology (electronics) – Implications • Internet skills – Application development – Content creation (audio)
Recording and playing sound Computer Analog to digital converter Computer 10010110 (150) 11001001 (201) 11000111 (199) … Digital to analog converter 10010110 (150) 11001001 (201) 11000111 (199) …
Zoom in – it is connected dots
Sampling rate of 45 k. Hz 9 samples in. 0002 seconds 45, 000 samples per second
Increase sample rate → quality ↑ file size ↑
Each sample produces a number 45, 000 numbers every second But How big (how many bits) is each number?
Increase sample size → quality ↑ file size ↑ (Sample “size” and sample “depth” mean the same thing).
Set default sample rate and size Edit > Preferences > Quality
Set sample rate and size
Where does this topic fit? • Internet concepts – Applications – Technology (electronics) – Implications • Internet skills – Application development – Content creation (audio)
A few questions At a sampling rate of 8, 000 16 -bit mono samples per second, what would be the file size for a one minute recording? How much larger would a stereo recording be? How much larger would the file size be if we were to sample at 48, 000 samples per second? How much larger would the file size be if the samples were 32 bits each?