Independent musicians
Prepare releases while keeping the final direction in your hands.
SoundSmith by Hearthlight Creative Studios
Start Mastering (opens in a new tab)SoundSmith by Hearthlight Creative Studios
Audio mastering that keeps the creator in control
Hearthlight’s flagship product is an AI-assisted mastering platform—not an AI music generator. Your source audio is processed locally in the browser, while every suggested direction remains yours to review and adjust.
Start with a free account and shape a master using understandable analysis, intent guidance and hands-on controls.
Built for independent production
Who SoundSmith is for
AI-assisted musicians and songwriters
Master finished creative work without turning the process into music generation.
Spoken-word and audiobook creators
Shape clear, controlled narration and long-form spoken audio.
YouTube and video creators
Prepare music, voice and programme audio for video-led work.
Small independent studios
Reduce repetitive mastering work across varied creator projects.
A more understandable workflow
Assistance without surrendering decisions
Creator-controlled
Suggestions and controls remain reviewable, adjustable and open to your judgement.
Privacy-conscious
Source audio is processed locally for mastering and is not stored by SoundSmith.
Understandable
SoundSmith explains the mastering direction instead of hiding every choice behind one button.
Mastering workspace
Practical tools, connected around intent
Review analysis, describe the result you want, adjust the processing and keep useful release records.
Explore all SoundSmith features- Waveform and audio analysis
- Plain-English intent prompts
- EQ guidance and controls
- Compression and limiting
- Loudness and true-peak monitoring
- Original/master comparison
- Genre and purpose guidance
- Release metadata
- Mastering provenance records
- Archive functions according to plan
- Artist DNA on the eligible plan
Four-part overview
From source file to recorded master
- 1Load your audio
- 2Describe the intended result
- 3Review and adjust the direction
- 4Export and save relevant records
Local mastering
Your source audio stays on your device
The recording is processed locally for mastering. SoundSmith may retain account details, selected settings, prompts, metadata, mathematical information and archive records according to your account and plan—but those records are not a stored source recording.
Understand SoundSmith’s privacy modelArtist DNA
A consistent mastering identity shaped by you
Choose which masters contribute selected preferences, EQ mathematics and optional intent information. Artist DNA can inform future mastering directions without storing or training on your source recording, and you remain free to adjust the result.
Release records
Keep a clearer record of your release
Standard metadata, optional professional codes, mastering-intent text and a mathematical configuration hash can support record keeping and help document the production process. They do not replace formal copyright registration.
Monthly plans
Choose the allowance your workflow needs
Free
£0/ month
2 masters per month
£10 plan
£10/ month
6 masters per month
£20 plan
£20/ month
10 masters per month
£35 plan
£35/ month
200 masters per month
Straight answers
SoundSmith FAQ
Is SoundSmith an AI music generator?
No. SoundSmith is an AI-assisted audio mastering platform. It works with audio you have already created and leaves the mastering decisions adjustable by you.
Does SoundSmith upload my audio?
No. Your source audio is opened and processed locally in your browser for mastering.
Is my source audio stored?
No. SoundSmith does not store your source recording in the cloud. Account records, settings, metadata and mathematical mastering information are separate from the audio file.
Is my music used to train external AI models?
Your source recording is not supplied to external AI systems for training. Your plain-English prompt, selected EQ preset and slider values are sent to the AI-assistance service to generate EQ mathematics for local browser processing, as explained on the SoundSmith privacy page.
Can I change the suggested settings?
Yes. Suggestions are starting points: relevant EQ, compression, limiting and other available controls remain reviewable and adjustable.
Can SoundSmith master spoken word?
Yes. SoundSmith is designed for spoken-word and audio-story work as well as music and video audio.
What is Artist DNA?
Artist DNA uses mastering preferences, EQ mathematics and optional intent information from masters you choose to contribute. It helps shape future starting directions and remains adjustable.
Can I use SoundSmith without professional industry codes?
Yes. Professional codes are optional fields for creators who already have them.
Is there a free plan?
Yes. The current shared plan configuration includes a free account with a limited monthly mastering allowance, and no payment card is required to start.
Does SoundSmith replace mixing?
No. Mastering works from the mix you provide; it does not replace the creative and corrective work of mixing.