Coding Systems 2 (analogue & digital data, sound files, MID)

What is the primary difference between analogue and digital data?

• Analogue data is continuous, while digital data is discrete.
• Analogue data is discrete, while digital data is continuous.
• Analogue data cannot be converted to digital.
• Digital data has no noise, while analogue data is perfect.

What does an ADC (Analogue to Digital Converter) do?

• Converts digital signals to analogue signals.
• Converts analogue signals to digital signals.
• Changes the sample rate of digital data.
• Converts sound waves into MIDI data.

Which of the following is NOT a function of a DAC (Digital to Analogue Converter)?

• Converting digital data into an analogue signal.
• Reproducing sound from digital formats.
• Converting analogue sound waves into digital data.
• Generating audio signals from digital sources.

What does the term "sampling rate" refer to in the context of digital sound files?

• The number of bits used to store each sample.
• The number of times per second a sound is sampled.
• The volume level of each sample.
• The total number of samples in a file.

How does increasing the sample rate affect the quality of a digital sound file?

• Increases the number of samples taken per second, improving sound quality.
• Decreases the number of samples taken per second, improving sound quality.
• Increases the number of bits used for each sample, improving sound quality.
• Decreases the storage size required for the file.

Which of the following defines "sample resolution" in digital audio?

• The total number of samples in the file.
• The number of bits used to represent each sample.
• The number of times the sound is sampled per second.
• The duration of the audio clip.

Which of the following factors directly impacts the file size of a digital sound file?

• The number of channels, sample rate, and sample resolution.
• The bit depth and the loudness of the sound.
• The compression ratio and sample duration.
• The type of speakers used to play the sound.

What is MIDI primarily used for?

• Storing raw audio files for playback.
• Transmitting musical performance data, such as notes and velocity.
• Recording digital sound with high sample rates.
• Converting analogue sound into a digital format.

Which of the following statements is true about MIDI files?

• MIDI files contain actual sound recordings.

• MIDI files store instructions for how music should be played.

• MIDI files have larger sizes compared to standard audio files.

• MIDI files are only used in analogue synthesisers.

If a digital sound file has a sample rate of 44.1 kHz and a 16-bit sample resolution, what does this mean?

• The sound is sampled 16 times per second, with 44.1 bits used per sample.
• The sound is sampled 44.1 times per second, with each sample containing 16 bits of data.
• The sound is sampled 44,100 times per second, and each sample contains 16 bits of data.
• The sound is sampled 16 times per second, with each sample being 44.1 bits in size.