Music and SFX Selection for Tech Demo Videos

Comprehensive guide for selecting, timing, and mixing audio elements in technology demonstration videos.

Music Matching Matrix

Match your content type to the appropriate audio style:

Content Type	Audio Style	BPM Range	Key Characteristics
AI/ML Demo	Electronic Ambient	80-100	Subtle synths, minimal percussion, futuristic pads
Code Tutorial	Lo-fi/Chill	70-90	Relaxed beats, non-intrusive, study-music feel
Product Launch	Uplifting Corporate	100-120	Building energy, positive resolution
Bug Fix/Debug	Tense to Resolution	90-110	Minor key start, major key resolution
Performance Demo	High Energy Electronic	120-140	Driving beats, impressive feel
API Integration	Tech Corporate	95-115	Professional, modern, clean
Security Feature	Dark Electronic	85-105	Suspenseful undertones, protective feel
Success Story	Inspirational	100-120	Emotional build, triumphant finish

BPM Guidelines by Mood

Calm/Professional (70-90 BPM)

• Documentation walkthroughs
• Slow-paced tutorials
• Thoughtful explanations

Moderate/Engaging (90-110 BPM)

• Standard demos
• Feature overviews
• Most tech content

Energetic/Exciting (110-130 BPM)

• Product launches
• Performance comparisons
• Call-to-action sections

High Energy (130-150 BPM)

• Speed demonstrations
• Competitive comparisons
• Hype moments (use sparingly)

SFX Categories for Tech Videos

Typing/Keyboard SFX

• Mechanical keyboard: Satisfying tactile sound for code input
• Soft membrane: Subtle for background typing
• Terminal beep: Old-school computer feel
• Recommended: Layer 2-3 variations to avoid repetition

UI Interaction SFX

• Click/Tap: Button interactions, menu selections
• Hover: Subtle whoosh for cursor movement
• Toggle: Switch on/off sounds
• Scroll: Gentle movement indicator

Transition SFX

• Whoosh: Scene changes, fast movements
• Sweep: Gradual transitions
• Glitch: Error states, interruptions
• Portal/Warp: Teleportation between views

Feedback SFX

• Success chime: Task completion, green checkmarks
• Error buzz: Failed operations, red indicators
• Warning tone: Caution states, yellow alerts
• Notification ping: New messages, updates

Ambient SFX

• Data flow: Background processing sound
• Server hum: Infrastructure ambiance
• Digital rain: Matrix-style atmosphere
• Circuit pulse: Electronic heartbeat

SFX Timing Patterns

Typing Sequence

Frame 0: First keystroke SFX
Frame 3-5: Subsequent keystrokes (randomize timing)
Every 15-20 frames: Brief pause
Final frame: Enter key or completion sound

Success Animation

Frame 0: Action initiated (subtle click)
Frame 15-30: Processing indicator (soft loop)
Frame X: Completion (rising chime, 200-400ms)
Frame X+10: Visual confirmation lands

Error Sequence

Frame 0: Attempt sound
Frame X: Error occurs (descending tone, 150-300ms)
Frame X+5: Visual shake/flash
Frame X+30: Recovery option appears (subtle notification)

Spawn/Appear Animation

Frame -5: Anticipation sound (optional subtle buildup)
Frame 0: Main spawn SFX (whoosh/pop/materialize)
Frame 5-10: Settle sound (landing/placement)

Volume Levels and Mixing

Standard Mix Levels (dB)

Element	Level	Notes
Background Music	-18 to -15 dB	Baseline, always present
Music During Narration	-24 to -20 dB	Duck when speaking
Primary SFX	-12 to -8 dB	Important interactions
Secondary SFX	-18 to -14 dB	Ambient, supporting
Notification SFX	-10 to -6 dB	Attention-grabbing
Voice/Narration	-6 to -3 dB	Always prominent

Ducking Guidelines

• Trigger: Voice/narration starts
• Attack: 100-200ms fade down
• Hold: Duration of speech + 200ms
• Release: 300-500ms fade up
• Reduction: -6 to -8 dB from normal level

Dynamic Range

• Keep music dynamic range to 6-8 dB for consistency
• Compress SFX to -3 dB peaks maximum
• Leave 3 dB headroom on master

Audio Fade Curves

Linear Fade

const linearFade = (progress: number) => progress;
// Use for: Simple transitions, short fades

Exponential Fade (Natural)

const exponentialFade = (progress: number) => progress * progress;
// Use for: Fade outs, natural feeling

Logarithmic Fade (Perceived Linear)

const logarithmicFade = (progress: number) => Math.sqrt(progress);
// Use for: Fade ins, volume changes

S-Curve (Smooth)

const sCurve = (progress: number) => {
  return progress < 0.5
    ? 2 * progress * progress
    : 1 - Math.pow(-2 * progress + 2, 2) / 2;
};
// Use for: Crossfades, smooth transitions

Recommended Fade Durations

Transition Type	Duration	Curve
Scene change	500-800ms	S-Curve
Music intro	1-2s	Logarithmic
Music outro	2-3s	Exponential
SFX tail	100-300ms	Exponential
Ducking	150-250ms	S-Curve

Royalty-Free Audio Sources

Premium Services

Service	Best For	Price Range
Epidemic Sound	High-quality tracks, large library	$15-49/month
Artlist	Cinematic, modern tracks	$16-25/month
Musicbed	Premium, unique compositions	$9-49/month
Soundstripe	Good variety, unlimited downloads	$15-35/month

Free Resources

Service	License	Notes
YouTube Audio Library	Free for YouTube	Must use on YouTube
Pixabay	Pixabay License	Free, attribution optional
Free Music Archive	CC licenses	Check individual tracks
Incompetech	CC BY	Kevin MacLeod library
Mixkit	Free	Commercial use allowed

SFX Libraries

Service	Type	Notes
Freesound	Community	CC licenses, huge variety
Zapsplat	Freemium	Good UI/UX sounds
Soundsnap	Premium	Professional quality
Epidemic Sound	Premium	Included with music sub

Tech/AI Demo Specific Recommendations

AI Assistant Demos

• Music: Ambient electronic, subtle pulse
• SFX: Soft typing, thinking indicator, friendly chimes
• Mood: Helpful, intelligent, approachable

Code Generation

• Music: Lo-fi beats, minimal electronic
• SFX: Fast typing, code completion pops, success tones
• Mood: Productive, focused, satisfying

Performance/Speed Demos

• Music: Driving electronic, building intensity
• SFX: Whooshes, rapid transitions, impact sounds
• Mood: Impressive, fast, powerful

Error Handling/Recovery

• Music: Tense to resolved, minor to major
• SFX: Warning tones, recovery sounds, success chimes
• Mood: Problem to solution narrative

Integration/API Demos

• Music: Corporate tech, clean electronic
• SFX: Connection sounds, data flow, completion
• Mood: Professional, reliable, seamless

Quick Reference

Essential SFX Kit for Tech Demos

1. Keyboard clicks (3-4 variations)
2. Mouse click
3. Success chime
4. Error tone
5. Notification ping
6. Whoosh (fast/slow)
7. Pop/spawn
8. Ambient data flow

Audio Checklist

• Music matches content mood
• BPM appropriate for pacing
• SFX synced to visual events
• Volume levels balanced
• Ducking configured for speech
• Fade curves applied
• License verified for usage
• No clipping (peaks under -3dB)

See references/ for detailed guides on music matching, SFX libraries, and audio mixing techniques.

Related Skills

• audio-mixing-patterns: ffmpeg commands for mixing narration with music
• remotion-composer: Audio layer integration in Remotion compositions
• video-pacing: Timing patterns that audio must sync with
• demo-producer: Full pipeline that uses these audio patterns