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Most platforms force you to trim tracks manually or settle for awkward fade-outs. Trackyard’s smart trimming analyzes the waveform and selects the best-sounding segment automatically — no editing required.

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The Problem with Manual Trimming

When you need a 30-second clip from a 3-minute track, you face several challenges:
  • Where to start? Random starting points often land mid-phrase or off-beat
  • Where to end? Abrupt endings sound amateurish
  • How to align peaks? Getting the big hit to land at the right moment requires manual editing
  • Time consuming — Multiply this by 100 videos and it’s a full workday
Trackyard solves this with waveform analysis and intelligent segment selection.

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How It Works

When you request a clip with duration_seconds, Trackyard:
1

Analyzes the waveform

The algorithm scans the entire track for:
  • Musical phrases — Where melodies start and end
  • Energy peaks — Drops, hits, crescendos
  • Beat alignment — Downbeats and measure boundaries
  • Tonal consistency — Segments with clear harmonic structure
2

Scores possible segments

Every potential clip is scored based on:
  • Musical coherence — Does it feel like a complete idea?
  • Energy distribution — Is there a natural arc (build → peak → resolve)?
  • Start/end quality — Clean entry and exit points
  • Hit point placement — Dominant energy peak location (if specified)
3

Selects the best segment

The highest-scoring segment is extracted and returned as an MP3. No fade-outs, no awkward cuts — just the best-sounding 30 seconds of that track.

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Usage Examples

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Basic Trimming

Request a 30-second clip: 
curl -X POST https://api.trackyard.com/api/external/v1/download-track \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "track_id": "trk_abc123",
    "duration_seconds": 30
  }' \
  --output clip-30s.mp3
What you get:
  • The algorithm finds the best 30-second segment
  • Clean start and end (aligned to musical phrases)
  • No manual editing required

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Hit Point Alignment

The killer feature: choreograph musical peaks to specific offsets.

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The Use Case

You’re editing a product video:
  • The product appears on screen at 12 seconds
  • You want the music to hit its peak exactly when the product appears
  • Traditional music libraries make you do this manually
Trackyard does it automatically.

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How to Use It

curl -X POST https://api.trackyard.com/api/external/v1/download-track \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "track_id": "trk_abc123",
    "duration_seconds": 22,
    "hit_point_seconds": 12
  }' \
  --output clip-with-hit.mp3
What happens:
  1. The algorithm finds the dominant energy peak in the track (the biggest drop/hit/crescendo)
  2. It selects a 22-second segment where that peak lands at the 12-second mark
  3. You get a clip perfectly timed to your video edit

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Real-World Examples

Scenario: 15-second Reel, product appears at 8 secondsRequest:
{
  "track_id": "trk_xyz789",
  "duration_seconds": 15,
  "hit_point_seconds": 8
}
Result: Music peaks right when the product enters the frame. Zero manual editing.
Scenario: 30-second ad, logo reveals at 22 secondsRequest:
{
  "track_id": "trk_def456",
  "duration_seconds": 30,
  "hit_point_seconds": 22
}
Result: The musical peak aligns with the logo reveal for maximum impact.
Scenario: 45-second trailer, title card at 35 secondsRequest:
{
  "track_id": "trk_ghi123",
  "duration_seconds": 45,
  "hit_point_seconds": 35
}
Result: Music builds throughout, then hits the peak right as the title appears.

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When to Use Smart Trimming

✅ Short-form content — Instagram Reels, TikToks, YouTube Shorts✅ Ads — Pre-roll, mid-roll, social media ads✅ Product demos — SaaS walkthrough videos, unboxing videos✅ Trailers — App, game, or film trailers✅ Batch processing — Auto-scoring 100+ videos with consistent durations

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Tips for Best Results

Tracks with obvious drops, hits, or crescendos work best for hit point alignment.Good candidates:
  • Electronic music with drops
  • Orchestral music with crescendos
  • Hip hop with bass hits
Less ideal:
  • Ambient/drone (no clear peaks)
  • Minimalist classical (subtle dynamics)
Place the hit point where you want maximum impact:
  • Product reveals
  • Logo drops
  • Title cards
  • Character entrances
  • Scene transitions
If a 30-second clip doesn’t sound quite right, try 28 or 32 seconds. Sometimes a slightly different duration gives the algorithm more flexibility to find a better segment.
Use the preview_url from search results to audition tracks before spending a credit on /download-track.

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Limitations

Hit point precision: The algorithm aligns the peak to within ±1 second of your specified offset. For frame-perfect sync, download the full track and edit manually.
Minimum duration: Smart trimming works best for clips 10+ seconds long. Very short clips (< 10s) may not have enough musical content for the algorithm to work effectively.

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API Parameters

ParameterTypeDescription
track_idstringRequired. The track ID from search results
duration_secondsnumberOptional. Clip length in seconds. Omit for full track.
hit_point_secondsnumberOptional. Offset (in seconds) where the musical peak should land. Requires duration_seconds.

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Next Steps

Download API Reference

Full API documentation for /download-track

Use Cases

See hit point alignment in action

API Quickstart

Try smart trimming yourself

Code Examples

Python and JavaScript examples