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The average range of human hearing is 20 to 20,000Hz (or 20kHz). For most audio
applications we recommend using a sample rate of 44.1kHz or 48kHz. Sample rate of CD-
quality audio is 44.1kHz. Higher sample rates will result in significantly higher CPU usage,
without much benefit to be gained in most circumstances.
Higher sample rates like 96kHz can be useful in sound design applications where you would like
flexibility to apply extreme pitch adjustments to the recording. A sound recorded at 96kHz and played
at half-speed would still be able to reproduce frequencies up to 24kHz, while the same sound recorded
at 48kHz and played at half speed will only be able to reproduce frequencies up to 12kHz.
8.3. Buffer Size
Buffer size is expressed in samples and is usually found in your application's audio settings.
Think of the buffer like a bucket. As soon as it fills up with samples, it is carried away to
the output. So, the smaller the bucket (buffer) the quicker it will get filled up and sent to the
output, and therefore will play back with less latency. The tradeoff, however, is that smaller
buffer sizes require your computer's CPU to work harder. Conversely, the bigger the bucket
(buffer) the longer it will take to fill up and be sent to the output. This decreases the load on
your CPU at the expense of more latency. As you will see below, changing the buffer size
depending on the type of audio task being performed is common practice.
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Arturia - User Manual MiniFuse 1 - A QUICK PRIMER ON DIGITAL AUDIO