Real-World Example: Why Music Files Are Big
Part of Images & Sound · GCSE GCSE Computer Science revision
This deep dive covers Real-World Example: Why Music Files Are Big within Images & Sound for GCSE Computer Science. Revise Images & Sound in 3.3 Data Representation for GCSE Computer Science with 18 exam-style questions and 16 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 9 of 12 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 9 of 12
Practice
18 questions
Recall
16 flashcards
Real-World Example: Why Music Files Are Big
Scenario: You want to store a 3-minute song in uncompressed CD quality.
- Settings: 44,100 Hz, 16-bit, stereo
- Duration: 3 minutes = 180 seconds
- Calculation: 44,100 × 16 × 180 × 2 ÷ 8 = 31,752,000 bytes ≈ 31.7 MB
- For full album (60 min): 31.7 × 20 = 634 MB!
This is why compression is essential! MP3 compression reduces this to ~3 MB per song (90% smaller) with minimal quality loss.
Keep building this topic
Read this section alongside the surrounding pages in Images & Sound. That gives you the full topic sequence instead of a single isolated revision point.
Practice Questions for Images & Sound
What does colour depth refer to in a digital image?
Explain the effect of increasing colour depth on a digital image. Refer to both file size and image quality in your answer.
Quick Recall Flashcards
18 questions on Images & Sound — practise free
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