Song Practice Lab Turn local songs into focused practice tracks.

Import local audio, separate stems, slow difficult sections, transpose, inspect chords, loop passages, and export a backing track from an offline desktop workbench.

Download free trial Buy $19 lifetime

Local song practice, not a cloud remix suite

Turn the song you already have into the practice track you actually need.

Song Practice Lab keeps stem separation, backing track export, loop practice, tempo, pitch, BPM, and chord regions inside one local desktop session for musicians and teachers who practice from real recordings.

Practice starts from local audio

Import MP3, WAV, and FLAC files and review duration, sample rate, channels, file size, and format before changing the session.
The workflow is designed around local files, local projects, and private practice material rather than upload-first music processing.
The app is useful for guitar, bass, keys, vocals, and teaching because the original recording stays close to the loop, chord, and mix controls.

Stems make the mix playable

Professional stem separation creates controls for vocals, drums, bass, guitar, and other material when the paid workflow is enabled.
Solo or mute stems to hear the target part, reduce the part you want to play yourself, or keep drums and bass in place for timing.
Stem separation is positioned honestly as practice help, not a promise of perfect studio isolation from every dense mix.

Loop, tempo, pitch, and chords stay together

A/B loops, speed control, pitch shift, BPM detection, and chord regions keep repetition, hearing, and context in the same screen.
Slow a hard phrase, transpose for the instrument, inspect chord changes, and raise tempo only when the part is under control.
Project save and backing-track export turn the session into repeatable material instead of a one-off playback adjustment.

$19 lifetime for a focused practice workstation

Community covers local song import and basic practice state; Professional unlocks stem separation, speed, pitch, chords, loops, projects, and export.
No subscription is needed for the desktop workflow, and no cloud account is required to practice a private rehearsal file.
Buy it when a saved backing track, controlled loop, and editable practice mix are worth more than juggling separate stem, slowdown, chord, and export tools.

Free

Local song import and basic practice-state playback controls.

Audio import
Stem playback controls
Basic practice session state
Website direct downloads

$19 lifetime

One-time professional license for stem separation, speed, pitch, chord, loop, project, and export workflows.

Stem separation
Speed and pitch control
Chord detection
Loop practice
Backing-track export

Buy $19 lifetime

Compare

Song Practice Lab vs Moises, Amazing Slow Downer, and Transcribe!

Hannes Software wins on focused local desktop workflows, $19 lifetime licensing, no subscription, simple export, and less friction than broader, more expensive, cloud-account, or overbuilt alternatives. Read why Hannes wins.

Capability	Song Practice Lab Best value	Moises	Amazing Slow Downer	Transcribe!
Local desktop practice session	Primary workflow, no subscription	Desktop/web/mobile suite, account-driven	Desktop/mobile slowdown workflow	Desktop transcription workflow
Stem separation	Paid workflow for vocals, drums, bass, guitar, and other material	Cloud-suite feature with account workflow	No	No
Slowdown without pitch change	Yes	Yes	Core feature	Core feature
Pitch/key control	Yes	Yes	Yes	Yes
Chord detection/reference	Practice-session chord regions	Part of a broader cloud suite	Playback-only workflow	Transcription-oriented analysis workflow
Loop practice	Yes	Yes	Yes	Yes
Backing track export	Paid export workflow	Cloud/account export flow	Playback practice flow	Transcription workflow
Privacy model	Local desktop product direction	Cloud/account workflow	Local file playback	Local desktop workflow
Workflow pressure	Private practice tracks from local files	Broad cross-device AI suite with account/subscription pressure	Narrow slowdown and pitch workflow	Narrower ear-transcription workflow

Before using Song Practice Lab

Does Song Practice Lab upload my songs?

No. The product is designed as an offline desktop practice tool for local audio files.

Which files can I import?

The first desktop build targets MP3, WAV, and FLAC import through the shared audio-core decoder.

Which features require a professional license?

Stem separation, speed control, pitch control, chord detection, loop practice, backing-track export, project save, and offline updates are paid features.