Introduction
You've recorded your podcast, edited out the mistakes and dead air, and now you're ready for the final step that will make your content sound like it belongs alongside the top podcasts in your niche: mastering.
SONE uses trained AI/ML analysis to control a chain of conventional audio-processing plugins for each uploaded file. Instead of building an EQ, compression, and loudness chain yourself, you upload an edited file and follow the job from pending to completed in your dashboard. The result depends on the source audio, so listen to and measure the finished file before publishing; SONE cannot guarantee that processing will repair every issue or meet every destination's requirements.
This guide explains exactly how the mastering process works at Sone, what happens to your audio during processing, how credits are deducted, and what output formats you can choose from.
How Automatic Mastering Works
Sone's mastering system is designed to be powerful yet effortless. Here's what happens from the moment you submit your audio for processing.
What the Automatic Pipeline Evaluates
Manual mastering requires listening experience, reliable monitoring, and careful control of several processors. SONE automates the repeatable parts of that workflow for speech-focused material.
When you submit your podcast for mastering, our system:
- Analyzes your audio - Examines frequency content, dynamic range, stereo image, and overall tonal balance
- Identifies issues - Detects problems like inconsistent levels, frequency imbalances, or dynamics issues
- Applies corrections - Processes audio through a chain of professional-grade effects optimized for speech content
- Prepares delivery loudness - Normalizes the completed file toward a consistent spoken-word target
Processing Chain Overview
The mastering process applies several audio processing stages in sequence:
Dynamic Processing Compression and limiting manage the difference between the loudest and quietest parts of your audio. This ensures your podcast is comfortable to listen to across various listening environments—from quiet offices to busy commutes.
EQ Correction Parametric EQ adjusts the frequency balance of your audio. Speech frequencies are emphasized for clarity while unwanted frequencies (like rumble or harshness) are reduced.
Loudness Normalization SONE targets -16 LUFS integrated loudness for podcast delivery. Hosting and listening platforms may still apply their own playback normalization, and no single exported number guarantees identical playback everywhere.
Spectral Shaping Additional processing ensures consistent tonal balance throughout your episode, addressing any material that might sound different from section to section.
Final Limiting Final limiting is applied to manage peaks. Check the exported file for clipping or other artifacts before publishing.
Understanding Credits
One credit is reserved while a job is pending or processing and deducted only after the mastering completes successfully; a failed job releases the reservation without consuming the credit.
Reservation and Deduction
The reservation prevents the same balance from being promised to simultaneous uploads. The central credit rule above determines when that reservation becomes a deduction or is released.
Free, Promo, and Premium Credits
Free credits can be used only for MP3 output, while promotional and premium credits can be used only for WAV output. The upload screen shows the eligible balances before you confirm the job.
Tracking Credit Usage
Your dashboard shows free, promo, and premium balances alongside each mastering job. This makes the selected output format and the credit used for a completed job visible in one place.
Mastering States and Status
Your podcast goes through several states during the mastering process. Understanding these states helps you know what to expect.
Pending State
Once you confirm your upload, the job enters a pending state and a credit is reserved. This means your audio is waiting for processing. During busy periods, pending jobs wait their turn in the queue.
Processing State
When your job moves to processing, our servers are actively working on your audio. Processing time depends on the file duration and current queue load; the dashboard shows the job status, and no fixed completion time is guaranteed.
Completed State
A completed status means your mastered audio is ready for download. You'll receive a notification when this happens, and the file appears in your dashboard.
Failed State
If processing encounters an issue that cannot be resolved, your job enters a failed state. The dashboard shows a safe failure category, retry eligibility, and a support path without exposing internal logs.
Output Formats Available
SONE accepts MP3, WAV, and FLAC source files up to 1 GB and provides MP3 or WAV output according to the selected credit type.
WAV Format (Uncompressed)
WAV is the uncompressed delivery option available with promo or premium credits. Use this format when:
- You want an uncompressed local working or archive copy
- You're doing further editing or processing in DAW software
- You need an uncompressed source for later encoding
MP3 Format (Compressed)
MP3 provides broad compatibility with reasonable file sizes and is the output for free monthly credits. Choose MP3 when:
- File size matters more than absolute quality
- You're uploading directly to podcast hosting platforms
- You need to share audio with collaborators who may have limited storage
What to Expect in Your Output
The result depends on the source audio, so listen to and measure the finished file before publishing; SONE cannot guarantee that processing will repair every issue or meet every destination's requirements. Evaluate the result against the source and the needs of your production.
Consistent Loudness
The dynamics and loudness stages are designed to reduce distracting level variation. Verify the full export because the source mix still affects the result.
Clear Speech Clarity
The processing is designed to support speech clarity and manage tonal imbalances. It cannot recover information that is missing or badly damaged in the source.
Professional Tonal Balance
The frequency-processing stages adjust tonal balance based on the analyzed file. Check the export on the playback systems relevant to your audience.
Platform Compliance
SONE targets -16 LUFS integrated loudness for podcast delivery.
Reviewing Your Mastered Audio
When your mastered audio is ready, take time to evaluate the results.
Listen Comprehensively
Don't just skim your mastered audio—listen to the full episode to identify any issues that might have slipped through processing. Pay attention to transitions, quiet sections, and any moments that seemed problematic in your source material.
Compare to Source
A/B comparison between your original and mastered versions reveals what changes were made. This helps you understand the processing and identify if any adjustments might be needed.
Download and Archive
Once satisfied with results, download your mastered audio. While Sone maintains your processing history, keeping local backups is prudent production practice.
Common Mastering Questions
Will mastering fix audio recorded with background noise?
Mastering optimizes the overall sound but doesn't replace proper noise reduction during editing. For best results, reduce background noise before uploading.
Can I control how much processing is applied?
Sone's automatic mastering applies optimized processing designed for podcast content. Manual controls over specific parameters aren't available, but the automated approach is tuned specifically for speech audio.
How long does mastering take?
Processing time depends on audio duration and current queue load. The dashboard shows whether a job is pending, processing, completed, or failed, so you do not have to guess whether it is still running.
What if I'm not satisfied with the results?
Your credit purchase goes toward the processing time and computational resources used. If you encounter technical issues or errors, contact support with your job details for investigation.
Ready to Master
Understanding how SONE's mastering process works clarifies what happens to your audio and which measurements to inspect. Submit a representative finished mix, then evaluate the automatic processing rather than assuming a particular transformation.
Upload a representative episode and compare the processed result with the source at a similar listening level.
Put this into practice.
Master your podcast in minutes.
Stop reading about professional podcast sound — start creating it. SONE's AI masters your audio instantly. 3 free credits every month.