Music Tech Component 4 Topic Quiz

What does MIDI stand for?

• Musical Instrument Digital Interface

• Music Information Digital Interface

• Musical Information Data Interface

• Music Instrument Data Interface

Answer explanation

The correct choice is 'Musical Instrument Digital Interface' as MIDI stands for Musical Instrument Digital Interface.

According to the Nyquist Theorem, what is the minimum sample rate required to accurately digitise a signal with a maximum frequency of 20 kHz?

• 20 kHz

• 40 kHz

• 10 kHz

• 80 kHz

Answer explanation

According to the Nyquist Theorem, the minimum sample rate required is twice the maximum frequency, so for a 20 kHz signal, the minimum sample rate needed is 40 kHz.

What is the standard MIDI resolution for velocity values?

• 64 levels

• 128 levels

• 256 levels

• 512 levels

Answer explanation

The standard MIDI resolution for velocity values is 128 levels, allowing for a wide range of sensitivity in musical expression.

If a digital audio file has a sample rate of 44.1 kHz, how many samples are taken per second?

• 44.1

• 441

• 4410

• 44100

Answer explanation

If a digital audio file has a sample rate of 44.1 kHz, it means that 44,100 samples are taken per second. Therefore, the correct answer is 44100.

What is the bit depth of a CD-quality audio file?

• 8-bit

• 16-bit

• 24-bit

• 32-bit

Answer explanation

The bit depth of a CD-quality audio file is 16-bit, which allows for a dynamic range of 96 dB and a high-quality sound reproduction.

Which of the following is NOT a common MIDI message type?

• Note On

• Note Off

• Pitch Bend

• Sample Rate

Answer explanation

The correct choice is 'Sample Rate' because it is NOT a common MIDI message type. Note On, Note Off, and Pitch Bend are common MIDI message types used in music production.

What is the Nyquist frequency for a sample rate of 48 kHz?

• 24 kHz

• 48 kHz

• 96 kHz

• 12 kHz

Answer explanation

The Nyquist frequency is half of the sample rate, so for a sample rate of 48 kHz, the Nyquist frequency is 24 kHz.

How many bits are used in a 24-bit audio file?

• 8 bits

• 16 bits

• 24 bits

• 32 bits

Answer explanation

A 24-bit audio file uses 24 bits for each sample, allowing for a higher dynamic range and better audio quality compared to 8 or 16-bit files.

What is the primary purpose of MIDI?

• To store audio recordings

• To transmit musical performance data

• To compress audio files

• To convert analogue signals to digital

Answer explanation

The primary purpose of MIDI is to transmit musical performance data, not to store audio recordings, compress audio files, or convert analogue signals to digital.

If an audio file has a bit rate of 320 kbps, what does 'kbps' stand for?

• Kilobytes per second

• Kilobits per second

• Kilobars per second

• Kilobits per sample

Answer explanation

If an audio file has a bit rate of 320 kbps, 'kbps' stands for Kilobits per second, indicating the number of bits processed per second.