# Two minutes of recording a digital audio file takes up 5.1 MB of disk space.

**Two minutes of recording a digital audio file takes up 5.1 MB of disk space. The sampling rate is 22050 Hz. What is the bit depth of the audio adapter?**

First, you must convert the specified information volume of the audio file from MB to bytes.

Since 1 MB is 1024 KB, and 1 KB is 1024 bytes, we get:

5.1 * 1024 * 1024 = 52224 * 1024 = 5347737.6 bytes.

Converting the file recording time from minutes to seconds.

Since there are 60 seconds in 1 minute, it will be:

2 * 60 = 120 seconds.

Find the bit rate of the audio file.

We divide its volume by the time of recording.

5347737.6 / 120 = 44564.48 bytes per second.

Determine the bit capacity of the adapter:

44564.48 / 22050 = 2.021 bytes.

When translated into bits, we get:

2.021 * 8 = 16.16 bits.

Answer:

The bit width of the adapter is 16 bits.