Slow down without changing pitch
Give your fingers time to catch up. Work through a difficult solo at a slower tempo, while keeping the recording in its original key.
A better way to practise music
ShifterrPractice, with purpose.
Slow it. Loop it. Master it.
Meet Shifterr — a dedicated music-practice device that helps you slow down difficult passages, loop the sections you want to master, and transpose songs into your key using simple physical controls.
Get early accessTargeting Kickstarter in February 2027.
Follow the developmentBe there
Be there
for the first note.
Join for demonstrations, development updates and early launch news.
Be among the first to experience Shifterr
Shifterr is currently in development. We're preparing our first working prototype and planning a Kickstarter launch. Join our early-access list to follow the journey and be among the first to know when it launches.
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Make the tricky
parts click.
Loop a difficult section
Set the beginning and end of a passage with A/B looping. Repeat that tricky phrase and keep your attention on your instrument.
Transpose to a different key
Shift the pitch of a recording to explore a different key or practise in a range that suits you.
Less screen time. More playing time.Your hands know
Your hands know
what to do.
Why a dedicated device when there are apps? Shifterr puts practice under your fingers: a screen-free design, a tactile dial and physical controls you can learn by feel. Reach for a control, make an adjustment and return to your instrument.
Keep your attention on the music
No screen to watch, notifications to check or apps to switch between on the device. Keep your phone as your music source and let Shifterr handle practice.
Feel every adjustment
Physical controls give your hands a consistent place to go. Change pitch, speed or loop position without navigating touchscreen menus.
Build a practice habit
A dedicated place for practice means fewer steps between hearing a difficult passage and working on it. Keep the controls beside your instrument and stay in the flow.
Four controls. Room to explore.
Pitch, Speed, Loop and Seek put the essentials within reach.
Pitch
Shift music up or down by up to 24 semitones without changing its speed.
Speed
Slow down or accelerate playback from 1–200% without changing pitch. At 0%, Freeze holds the current sound as a sustained texture.
Loop
Capture and repeat a section of audio. Resize the loop or fine-tune its start and end points while it plays.
Seek
Move through captured audio or an active loop, with fine adjustment for precise positioning.
SELECT
Shape your sound. Set your connections.
The left SELECT button accesses these settings.
EQ/FX
Shape the sound with Reverb, Delay, Low-pass Filter, Bell EQ, High-pass Filter, Reverse, and Chorus.
Reference Frequency
Adjust the A4 tuning reference between 415 and 442 Hz for music playback and the tuner.
Input
Choose LINE IN, MIC, or USB.
In the browser prototype, LINE IN and USB use loaded music. MIC supports real microphone recording.
Output
Choose LINE OUT, SPK, or Bluetooth.
Output selection is simulated in the browser prototype.
TOOLS
Find your tempo. Find your tuning.
The left TOOLS button accesses these practice tools.
Metronome
Practise with an adjustable 40–200 BPM click, tap tempo, and 1–8 beats per bar.
Tuner
Tune an instrument through the microphone, with note detection and LED feedback showing flat, sharp, or in tune.
These features describe the current design and browser prototype. Final hardware features and connections will be confirmed as development progresses.
Practise with music
from your phone.
Designed to work with music played on your phone. Supported connections, phones and applications are still being tested and will be confirmed before launch.
We’ll show the real workflow before launch. Universal streaming compatibility and Bluetooth transmission are not confirmed.
Stay focused
on playing.
A screen-free design, tactile dial and dedicated physical controls put practice adjustments within reach. Spend less time navigating a touchscreen and more time working on the passage in front of you.
Features, compatibility, pricing and launch timing may change as development progresses.
Built by musicians,
for musicians.
We’re a two-founder team in the UK building a more focused way to practise. We’re preparing our first working prototype to help us refine the controls, product design and manufacturability. We’ll share honest demonstrations and development updates as we go.
Meet Sonalux ↗A few things
you might ask.
What does Shifterr do?
Shifterr is being developed for pitch-preserving tempo changes, A/B looping and pitch shifting, with a dedicated dial and physical controls.
Do I need to import songs?
The aim is to practise with audio played from a connected phone. The supported workflow and connections are not yet final; we’ll demonstrate them before launch.
Which phones and apps will it support?
Compatibility is not yet final. We’re testing supported connections and applications. The render is a design illustration; its labels do not confirm included features or Bluetooth support.
Can I buy one now?
Not yet. Shifterr is in development. Joining the list is not a purchase, reservation or guarantee of an early-bird reward.
When does Kickstarter start?
Our provisional target is shown above. It depends on product and manufacturing readiness, and may change.
What does joining the list mean?
You can choose to receive product updates, demonstrations and Kickstarter launch news. Confirm your email to complete signup, and unsubscribe at any time using the link in our emails.
What will it cost?
Pricing and rewards are not yet final. We’ll share confirmed information when it’s ready.
Your next breakthrough
starts with practice.
Get early access ↗No purchase. No reservation. Just updates, with your permission.