Recording software measures a sound wave 44,100 times each second. What is the term for how many measurements it takes per second?

A student records a guitar note in stereo, so the file keeps one stream of samples for the left speaker and one for the right. What is each stream called?

A voice recorder stores each sample as an 8-bit number. How many different values can one sample have?

During digitizing, software records one channel of audio at a sample rate of 32 kHz. How many samples does it take each second?

An audio editor displays 48,000 stored wave measurements for each second of a recording. Which term names one of those measurements?

A student re-records a 30-second mono clip, changing only its sample rate from 22,050 to 44,100 samples per second. What happens to the uncompressed recording?

A podcaster lowers only the sample rate before saving an uncompressed recording. Which result is most likely?

Two uncompressed mono recordings have the same duration and bit depth. One uses 48,000 samples per second and the other uses 24,000. Which statement is correct?

An engineer changes only an uncompressed recording's bit depth from 8 bits per sample to 16 bits per sample. What changes?

A sound effect is saved twice without compression. Version B has the same sample rate, duration, and channels as Version A, but a higher bit depth. How does Version B differ?

A music app saves a song by permanently removing audio details that are less likely to be noticed. What kind of compression is this?

A compressed audio file can be decompressed to reproduce every original bit exactly. Which statement describes its compression?

Which of these audio formats uses lossy compression?

Lossless compression makes a recording smaller, yet the original can be rebuilt bit for bit. How does it do this?

A student opens a song saved in a lossy format, edits it, and saves it again in the same lossy format, many times over. What is most likely?

A sound engineer archives a master recording so future editing can begin with exactly the original audio data. Which choice fits best?

A school wants to place many spoken announcements on devices with very limited storage, and tiny changes in audio quality are acceptable. Which format choice is most suitable?

A researcher must send a short field recording to another lab, where software will compare the recovered audio data exactly with the original. What should the researcher choose?

A game developer needs background music files to download quickly, and the team accepts a small permanent reduction in audio detail. Which approach matches the need?

An uncompressed mono recording lasts 10 seconds at 8,000 samples per second and stores each sample in 8 bits. Ignoring any header, how many bytes is it?

An uncompressed stereo recording lasts 5 seconds at 44,100 samples per second with 16 bits per sample per channel. Ignoring headers, what is its size in bytes?

An uncompressed mono recording lasts 30 seconds at 22,050 samples per second and uses 16 bits per sample. Ignoring any header, how many bytes are stored?

A microphone produces a continuously varying electrical signal, but a computer must store numerical values. Which component changes the signal into numbers?

Why must recorded sound pass through analog-to-digital conversion before a computer can save it as an audio file?

A computer has stored audio as numbers and needs to send it to headphones as a changing electrical signal. What component performs this conversion?