SurStudioFree browser audio toolkit
Browse free vocal tools, audio editors, music analysis and effects. Find the right tool, follow its instructions and continue into a recording workflow.
Remove singing, isolate a voice or prepare backing music. Compare a preview before separating a full song.
Use the vocal remover to turn a mixed song into an instrumental backing track and an estimated acapella. Fast AI uses a lightweight model; Quality AI offers a slower alternative for difficult recordings. Audio is processed on your device.
Choose a local video and SurStudio extracts its soundtrack on your device. Convert MP4 video to MP3 audio, choose another soundtrack format, or use the existing AI controls to separate vocals and instrumental audio without leaving this workspace.
The stem splitter separates vocals, drums, bass and other instruments with four lightweight Spleeter AI models. Each stem has its own WAV download. Use the synchronized mixer to isolate a part or create a backing track without drums or bass.
An acapella extractor estimates the singing voice inside a mixed recording. Use the vocal output for listening, rehearsal or work on recordings you have permission to edit. Both vocals and an instrumental are produced.
Start with a backing track from Vocal Remover, or use an instrumental you already own. Karaoke Studio combines your microphone with the backing track while recording.
Trim recordings, combine clips and arrange multiple tracks. Choose sequential joining for a sequence or Mini Studio for layered audio.
Use the audio cutter to keep a phrase, make a short practice clip or trim a recording. Start and end times are entered in seconds. A short fade helps avoid an abrupt opening or ending.
The audio joiner places your uploaded track first, followed by the files you add in order. Crossfade overlaps the transitions instead of creating a hard cut between clips.
The voice recorder captures your microphone in the browser. Microphone permission is requested when you start recording. No account or audio upload is needed.
Import a backing track, record a microphone take and arrange recorded audio on separate tracks. Save a project and export the mix as WAV.
Estimate tempo and key, verify a single note and rehearse a short phrase. Confirm automatic readings with your ear.
Key and tempo estimates provide a starting point for practice or matching tracks. Automatic analysis can be uncertain on sparse, changing or complex recordings. Tap tempo helps you check the perceived beat yourself.
Live Tuner estimates the pitch of one note at a time. It shows the note, frequency and distance in cents from standard tuning, with A4 set to 440 Hz.
Practice Room repeats a selected section in the original player. Slower playback helps you study timing and articulation before returning to normal speed.
Transpose a backing track or create a linked speed-and-pitch effect. Preview modest adjustments before exporting.
Pitch and speed controls let you transpose a song into a comfortable range or slow a passage for practice. Independent time stretching keeps speed and pitch separate; large changes can still introduce artifacts.
Slowed + Reverb changes playback rate and adds an ambience effect. In this creative mode, slowing the audio also lowers pitch. Use Pitch & Speed when you want independent control.
Nightcore Maker increases playback rate, raising pitch and shortening the track together. It is a creative edit rather than vocal correction or AI voice generation.
Shape frequency balance, manage peaks or quiet idle microphone noise. Keep an original copy and compare at similar loudness.
A noise gate reduces audio below a chosen threshold. It is useful for quiet gaps in speech or instrumental recordings. It does not identify noise underneath singing or music and is not an AI denoiser.
Volume & Fades applies gain in decibels and smooth transitions at the start and end. Optional peak normalization changes the overall level without promising a specific streaming loudness.
An equalizer adjusts frequency ranges. Use small moves to reduce boominess, soften harshness or brighten a dull recording. EQ changes tone; it does not create separate instrument stems.
Compression reduces level above a threshold. Attack and release control how quickly it responds, while makeup gain compensates for reduced loudness. Stereo linking keeps left and right gain changes together.
Basic Mastering combines gentle EQ, compression and peak normalization. It is a starting point for polishing a mix, not an AI mastering service or a guarantee of streaming loudness compliance.
Browser processing uses your device memory and CPU. A short test is useful on mobile. AI separation can leave voice traces or instrument artifacts.
Follow a practical audio tutorial or browse tool FAQs. Use headphones for microphone monitoring and keep an unprocessed original.