User guide

How to take your song from raw file to finished master. Most of it takes seconds, and everything happens on your own phone or PC.

Getting started

PC: Drag your songs into the list on the left, or click “Add songs”. You can also drop in a whole folder. Mastered songs go into a “Mastret” subfolder next to each song, or into a folder you choose.

Phone: Tap “Choose a song”, or share an audio file to GrooveSurge from the Suno app, Files or Downloads.

The app accepts MP3, WAV, FLAC, M4A, AAC, OGG, Opus and AIFF.

The first time you open the app, it asks if you would like a short tour. Read more about it in the next section.

The tour

The tour shows the whole app in under a minute with a built-in demo song. It plays by itself, so you can just sit back and listen.

• “Finish” ends the tour at any time.
• ⏮ Back and “Next” jump between the steps. The counter and the bar at the bottom show how far you have come.
• Auto is lit while the tour plays by itself. Tap it to stop on the current step and read in peace, and tap again to carry on.
• “A – original” and “B – mastered” in the bubble switch between the original and the mastered version while the demo song plays – without stopping the tour.

You can find the tour again under the gear icon. On PC, Ctrl+Shift+O runs it without buttons – handy for a screen recording.

Choose a preset

A preset is a ready-made sound. Start with one of these and listen:

• Natural – a slightly firmer low end, otherwise untouched. A good choice for your own mixes.
• Warm – round, full bass and a soft top.
• Heavy – a powerful, heavy low end. Lifts AI songs that sound flat.
• Workout – pumping and loud, with some deep bass.
• Club – the most sub-bass, for big sound systems.
• Phone – bass and clarity you can hear on a phone speaker.

Listen and compare (A/B)

Press play and switch between A (the original) and B (your settings) while the music plays. You hear a 30-second excerpt.

“Equal loudness” turns down the louder one, so you hear the difference in sound, not just volume. The LED meters show level and bass.

A can also be another song, a reference song or other settings. On PC: Space plays and pauses, A / B or Tab switches.

Smart start and “Like another song”

Smart start listens to 40 seconds from the middle of the song, tells you in plain words what it hears, and suggests settings. Tap “Use the suggestion” and listen to B.

Choose “Like another song” and a song whose sound you like. The app then makes your song more like it, loudness included.

The suggestion is a starting point. If you keep adjusting, Smart start keeps up:

• The tonal balance gets its own dot, “With your settings”, so you can see how your changes move the sound compared with the suggestion and the target.
• The Your changes line shows exactly what you have changed, for example “Air 1.5 → 3.0 dB”.
• “Use with changes” makes the suggestion with your adjustments the starting point for the song. It is named “Smart start with your changes”.
• “Back to the suggestion step by step” moves the sliders back to the suggestion one by one. A coloured dot shows each change, and “Stop” cancels. If you have not changed anything, the button is called “Apply the suggestion step by step”.

Adjust it yourself

Each slider shows how much you have changed from the preset, with a plain-language explanation. The undo arrow next to it sets it back.

• Bass boost – lifts the low end around 75 Hz.
• Punch – makes the bass even and firm.
• Harmonic bass – overtones that make the bass audible on phones and small speakers.
• Deep bass – adds a clean tone one octave below the bass, with the same rhythm. Real depth on speakers and headphones. Many Suno songs have almost nothing below 50 Hz.
• Clean up mud – reduces the muddiness around 280 Hz.
• Clarity and Air – vocals forward around 3 kHz and an open top from 10 kHz.
• Tame harshness – softens metallic treble only when it sticks out.
• Stereo width – a wider image above the bass.
• Target and Ceiling – loudness in LUFS (−14 is Spotify level) and the highest peak.

The settings apply to the song you have selected – each song remembers its own, also when you switch back and forth and when you tap “Master all”. The list shows which sound each song gets. To give every song the same sound, tap “Apply to all songs”. Once a song is mastered, the song database remembers its settings for the next time you add it.

If you like the sound, save it with “Save as preset”.

Start and end

Silence at the start and end is removed automatically. “Fade-out” gently fades the end of every song – handy when a song stops abruptly.

To control one song precisely, use the trimmer at the bottom of “Start and end” (or ⋮ More → “Trim start and end” next to the song in the list on PC). Drag the handles, add fade-in and fade-out, and listen to the start and end before you master.

Clip and fade – for Shorts, without mastering

The “Clip and fade” section makes a clip of the song as it is, without mastering. Great for TikTok, Reels, YouTube Shorts and previews.

• Choose a length: 15, 30, 40, 60 or 90 seconds, or fine-tune it.
• Tap or drag in the waveform to move the clip, or tap “Find the chorus” – the app finds the strongest part.
• Add a fade in (up to 5 sec) and fade out (up to 10 sec), and tap “Listen to the clip”.
• If the song is mastered, you can clip from the mastered version instead.
• Choose “Whole song” to just add a fade in and out to the whole song – without mastering and without a length limit.

“Save the clip” saves it as MP3 (WAV with Pro). On PC it goes into the same folder as the mastered songs. On mobile you choose where, or tap “Share” and send it straight to TikTok or YouTube. Once the clip is saved, the song is removed from the list.

Master and read the result

Choose a format (MP3, WAV or FLAC) and tap Master. On PC you can click “Master all” for the whole list.

The result card explains what happened to loudness, bass and distortion. The streaming check shows how much Spotify, Apple Music, YouTube, Tidal and Amazon will turn the song down. That is completely normal – the song keeps its punch.

Tap the summary button next to a song in the list (or “Summary” in the result) to see the summary: facts about the original, what the app hears, your own clip, ISRC and the full result with explanations. The arrows at the top move between songs.

You can open the summary before mastering too. The “Settings” section shows what the song will get – anything you changed from the preset is highlighted – and “How the song will sound” shows what to expect and updates as you adjust.

Ready for distribution and the song database

“Ready for distribution” makes a 44.1 kHz WAV with the right name, title, artist and ISRC for DistroKid, LANDR, TuneCore, CD Baby and more. Label AI songs if the distributor asks.

The song is saved in the song database (the notebook icon at the top). There you track status per distributor: Ready, Sent and Released. The whole database can be exported as a spreadsheet.

Every song you master is added to the song database automatically, with date, preset, format and loudness – you don’t have to do anything.

Automatic ISRC: Under the gear icon → “ISRC codes”, enter your country and registrant code (for example NO-ABC) and the next number. Every newly mastered song then gets the next free code, and the code is written into the file. A song that already has an ISRC keeps it, and the number can start again at 00001 every new year. In the distribution form, the button in the ISRC field fetches the next code.

Backing up the song database

Your song database and ISRC counter are valuable. Under the gear icon → “Backup” you can:

• Save backup – one file with the song database, ISRC counter, your presets and the settings.
• Restore – “Merge” keeps your songs and adds the missing ones, “Replace” swaps the whole list. The ISRC counter never goes backwards, so no code is ever handed out twice.
• Automatic copy to folder (PC) – choose for example OneDrive, Dropbox or a USB stick, and a copy is written there every time the song database changes.

The app also keeps a daily copy of the song database in its own folder for the last 14 days.

Compact view and customising

Once you know the app, you can turn on Compact view under the gear icon. Then almost everything fits without scrolling:

• The explanations are hidden and the sliders get slimmer.
• The undo arrow sits right next to each slider.
• Smart start shows only the suggestion and the buttons. Tap “See the analysis” for the full analysis.
• On PC the sections are placed in two columns.

The explanations are still in the summary for each song.

• View at startup: Explained, Compact or As last time.
• Larger text and colour themes are under the paintbrush.
• Promo mode under the gear icon shows the explanation when you click an option – handy for screen recordings. On PC, Ctrl+Shift+D turns it on and off.

PC only

• Album mode – all the songs get sound and loudness that fit together. Each song keeps its own settings, and the album report compares each song with them.
• Video – make videos for TikTok, Reels and YouTube with cover art, title and a live waveform. Choose portrait, square or landscape.
• The song list gets wider on large screens and shows titles over two lines. Hover over a title to see the full name.
• ⋮ More next to each song gathers “Trim start and end”, “Clip and fade”, “Ready for distribution” and video.

Free and Pro

On the free plan you can listen and adjust everything. You can master with Natural and Heavy, 3 new songs per week, and save as MP3. Re-mastering the same song doesn’t count.

Pro gives you all presets and your own settings, unlimited mastering, WAV and FLAC, Ready for distribution, your own presets, album mode and video without watermark. The subscription can be cancelled at any time in Google Play or Microsoft Store.

Tips for Suno and Udio songs

• Start with Smart start, or with Heavy.
• If the song lacks depth on a sound system, try Deep bass at 30–50%.
• If the treble sounds metallic, turn up Tame harshness.
• Download WAV from Suno if you can. It gives a better result than MP3.
• Check the terms of Suno or Udio before releasing the song commercially.
• Make a teaser: “Clip and fade” → “Find the chorus” → 30 sec → Share.

If something doesn’t work

• It crackles after uploading: Set “Ceiling” to −1.0 dBTP or lower.
• I can’t see “Deep bass”: The slider only appears when the app has the deep bass engine. Update the app.
• Mastering fails: Try saving the song as WAV first, then master again.
• The explanations are gone: Compact view is on. Turn it off under the gear icon, or open the summary for the song.

Questions? Write to support@groovesurge.com.

← Back to the home page