Online AI mastering for finished songs with free preview and AI-powered adjustment
Stage
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Founded
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Based in
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Pricing model
Freemium
Freemium
Pricing
Free tier: up to 3 splits per day for files up to 2 minutes and 50 MB. Paid credits: Starter $4.90 (20 minutes), Plus $9.90 (50 minutes), Pro $19.00 (120 minutes). Credits never expire and are billed per minute used (rounded up).
Free: 30-second preview, 10 revisions with free account, no full-track download. Unlimited: $14/month or $43/year ($3.58/month), unlimited full-track exports, 20 revisions per track. Unlimited Plus: $22/month or $65/year ($5.42/month), everything in Unlimited plus unlimited revisions, full-length pr
Key features
No signup required for free tier
In-browser stem preview before downloading
Supports MP3, WAV, M4A, and AAC formats
Automatic file deletion after approximately one hour
Usage metered fairly by processing time
Demucs htdemucs AI model for source separation
Privacy-minded with no account library
Free tier up to 2 minutes with 3 daily splits per IP
Free 30-second mastered preview without signup
Eleven mastering controls plus intensity setting and six-band EQ
Six engineer styles as different starting points
Plain-language prompt mastering with AI descriptions
New version created for each adjustment, comparable while playing
Batch mastering up to 10 tracks with Unlimited Plus
Downloads as WAV 24-bit or MP3 320 kbps
Accepts WAV, MP3, FLAC, AIFF, M4A, OGG files up to 1.5 GB and 22:30 long
Priority render queue with Unlimited Plus plan
Full-length preview available with Unlimited Plus
What makes it different
No account or signup required to remove vocals
Vocal and instrumental stems remain perfectly aligned for easy switching
Fast processing with no desktop installation or configuration needed
Truly free tier with no hidden checkout or trial card required
Free preview with no account required before paying
AI-powered mastering styles as alternatives to hiring an engineer
Plain-language adjustment descriptions instead of technical audio parameters
Supports mastering of AI-generated songs
Every revision saved and comparable while playing the track
Get Vocal Remover
MasteringKit