Ship Studio-Quality Audio Without Building the DSP/ML
Add professional mixing and mastering to your product with one API call. 5M+ tracks processed, under 60 seconds per master, free previews to test before you commit.
Trusted by Industry Leaders
Multitrack Mixing
Professional-grade AI mixing that balances levels, applies EQ, compression, and effects to 2-32 tracks. Create cohesive, radio-ready mixes in seconds.
Learn More →AI Mastering
Optimize loudness, tone, and width for streaming platforms. Get broadcast-ready masters that meet Spotify, Apple Music, and YouTube standards.
Try Mastering →Rapid Processing
Cloud-based processing delivers professional-quality results in moments. Scale to thousands of tracks with our reliable infrastructure.
View Pricing →The Old Way vs. The RoEx Way
Without RoEx
- ✕ Hire a mastering engineer: $75–$200/track
- ✕ Wait 3–5 business days per project
- ✕ Manage revisions and feedback loops
- ✕ Build DSP/ML from scratch: months of R&D
- ✕ Doesn't scale beyond a handful of tracks
With RoEx Tonn API
- ✓ From $1.76 per master
- ✓ Results in under 60 seconds
- ✓ Free 30-second previews to test first
- ✓ One API call. Python client or REST.
- ✓ Scales to thousands of tracks effortlessly
Built for Scale
Over 5 million tracks processed since 2023. Enterprise-grade reliability for teams that ship audio at scale.
How It Works
Create Your Account
Sign up in under a minute. Most accounts are approved within a few hours.
Buy Credits & Get Your API Key
Choose a credit package that fits your needs. Start with just $10.
Start Processing Audio
Use our Python client or REST API. Free 30-second previews let you test before spending credits.
Simple Integration
Get Started in Minutes
Our Python client and REST API make integration effortless. Free 30-second previews let you test before committing.
-
✓
Install via pip:
pip install roex-python - ✓ Comprehensive API documentation
- ✓ Bearer token authentication
- ✓ Webhook support for async workflows
# Install the client
pip install roex-python
# Authenticate and master
from roex import RoexClient
client = RoexClient(
api_key='your_api_key'
)
# Create mastering preview
result = client.mastering_preview(
track_url='https://example.com/song.wav',
musical_style='ROCK_INDIE',
webhook_url='https://example.com/webhook'
)
# Retrieve final master
master = client.retrieve_final_master(
task_id=result.task_id
)
print(f'Download: {master.download_url}')// Create mastering preview
const response = await fetch(
'https://tonn.roexaudio.com/masteringpreview',
{
method: 'POST',
headers: {
'Content-Type': 'application/json',
'Authorization': 'Bearer your_api_key'
},
body: JSON.stringify({
masteringData: {
trackData: [{
trackURL: 'https://example.com/song.wav'
}],
musicalStyle: 'ROCK_INDIE',
desiredLoudness: 'MEDIUM',
webhookURL: 'https://example.com/webhook'
}
})
}
);
const { mastering_task_id } = await response.json();
console.log('Task ID:', mastering_task_id);# Create mastering preview
curl -X POST https://tonn.roexaudio.com/masteringpreview \
-H "Content-Type: application/json" \
-H "Authorization: Bearer your_api_key" \
-d '{
"masteringData": {
"trackData": [{
"trackURL": "https://example.com/song.wav"
}],
"musicalStyle": "ROCK_INDIE",
"desiredLoudness": "MEDIUM",
"webhookURL": "https://example.com/webhook"
}
}'
# Response: {"mastering_task_id": "abc123..."}API Overview
Base URL & Endpoints
All API requests are made to:
https://tonn.roexaudio.com
Supported endpoints: /mastering,
/mixing, /enhance, /analyze, /cleanup
Authentication
All requests require Bearer token authentication. Include your API key in the Authorization header:
Authorization: Bearer YOUR_API_KEY
Obtain your API key from your dashboard after registration and approval.
Preview → Final Workflow
- Request Preview: Call the preview endpoint (e.g.,
/masteringpreview) with your audio file URL. Returns a 30-second preview at no credit cost. - Review Results: Download and review the preview to ensure settings meet your needs.
- Retrieve Final: If satisfied, call
/retrievewith the task ID to get the full processed audio. Credits are deducted at this stage.
Note: Previews are free for accounts with purchased credits. Only final retrievals consume credits.
Output Formats
- ✓ Audio Files: WAV, FLAC, and MP3 formats (44.1kHz, 48kHz, or original sample rate)
- ✓ Settings JSON: For mixing, optionally retrieve FX settings (gain, pan, EQ, compression)
- ✓ Processed Stems: For multitrack mixing, download individual processed stems
- ✓ Analysis Data: JSON response with mix/master readiness metrics
Rate Limits & Processing
- Rate Limit: 100 requests per minute per API key
- Average Processing Time: <60 seconds for mastering; 2-5 minutes for multitrack mixing
- Max Track Length: 10 minutes per audio file
- Multitrack Mixing: 2-32 tracks per request
- Webhook Support: Async processing with callback notifications
What Our Partners Say
"By partnering with RoEx, we're democratizing access to professional mastering tools, empowering independent artists to compete at the industry's highest levels."
"RoEx Automix is an AI-powered web tool designed to help musicians and producers achieve a professional-quality mix in minutes."
Frequently Asked Questions
What does the Tonn API do?
How is pricing calculated?
Do you offer previews?
What audio formats are supported?
How do I authenticate API requests?
What are the track limits?
Is AI mastering as good as a human engineer?
Will I lose creative control?
What if the results aren't what I expected?
Ready to Ship Studio-Quality Audio?
Trusted by UnitedMasters and featured in Music Week. Test with free 30-second previews before spending a single credit.