Mission 035
Digital Audio
How sound becomes numbers and back again.
Sample rate + bit depth = the resolution of your audio universe.
+40 XP
// WHAT IT DOES
Digital audio works by sampling a sound wave thousands of times per second and storing each measurement as a number. (Hz) = how many samples per second. = how precisely each sample is measured.
44.1 kHz / 16-bit is CD quality. 48 kHz / 24-bit is video / modern studio standard. Higher rates are diminishing returns for most production.
Higher sample rate captures higher frequencies (Nyquist: max audible = SR/2). Higher bit depth gives more dynamic range and less .
Think of it like → Sample rate is camera frames per second. Bit depth is image resolution per pixel. Both matter, but past a point, more doesn't help.
▸ WHY YOU CARE
- • Pick the right format for your delivery target.
- • Avoid rate conversion artefacts by matching project to source.
- • Understand why 'high-res' isn't always meaningfully better.
// SEE & HEAR IT
No simulator for this mission — read & quiz only.
▸ HOW IT WORKS
▸ Signal flow — watch the dot
▸ SIGNAL FLOW
Glowing dot = your signal travelling through Live.
▸ LISTEN FOR
- • Difference between 16 and 24-bit on quiet passages.
- • artefacts at low sample rates.
- • Noise floor at low bit depth.
▸ WALKTHROUGH (5 steps)
- 1. DO: Set a project to 44.1 kHz / 16-bit.▸ LISTEN: CD-quality reference.
- 2. DO: Compare with 48 kHz / 24-bit project.▸ LISTEN: Slightly more and noise floor margin.
- 3. DO: Try 8-bit conversion to hear the noise floor.▸ LISTEN: Hissy, lo-fi — proves bit depth limits dynamic range.
- 4. DO: Render a session at 44.1 kHz and 96 kHz and A/B in matched playback.▸ LISTEN: Most differences are masked once dithered to 16-bit delivery.
- 5. DO: Truncate a 24-bit mix to 16-bit without dither.▸ LISTEN: Quiet tails reveal quantisation noise; with dither, it disappears.
▸ COMMON MISTAKES
- ✗ Mixing sample rates within a project.
- ✗ Using 16-bit for tracking.
- ✗ Believing higher sample rates always sound better.
// QUIZ (QUICK)
Question 1 / 40 correct
What does sample rate mean?