A marine research vessel uses an array of underwater hydrophones to record whale vocalisations. The audio is captured as uncompressed digital sound.
State an algebraic expression to calculate the total raw data size, in bits, of a recording that has c c\,c independent audio channels, a sample rate of s Hzs\text{ Hz}s Hz, a bit depth of d bitsd\text{ bits}d bits, and a duration of t secondst\text{ seconds}t seconds.
40 exam-style questions on Edexcel GCSE Computer Science Data representation, covering Encoding characters with 7-bit ASCII, Representing bitmap images in binary, Representing analogue sound in binary, and Limitations of binary representation. Each one has a worked solution and a mark scheme showing where the marks go.