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

• Keyboard clicks (3-4 variations)

• Mouse click

• Success chime

• Error tone

• Notification ping

• Whoosh (fast/slow)

• Pop/spawn

• 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