Stop Practicing Blind.
See Your Timing With Scientific Precision.
Locking In: The Complete Guide
for Percussionists Who Are Done Guessing.
Timing isn’t talent... it’s a skill you can build.
Most percussionists guess at rhythm. “Locking In” gives you a proven way to see, test, and correct your timing step by step...
so you can play with confidence in rehearsals, auditions, and performances without second‑guessing every note.
And the best part? It’s built on one of the most accessible yet cutting‑edge platforms available today — just $6 on the App Store.
See "Locking In" in Action
"Finally... real‑time feedback for percussion timing."
This isn’t theory. This is a system.
Using a simple app, “Locking In” unlocks a hidden feature that turns your phone or tablet into a beat perception powerhouse...
so you can train rhythm scientifically, and not hope it’s a gift.
Find the Perfect Guide
For Your Needs
Feature | Lite | Starter | Core | Advanced |
|---|---|---|---|---|
Complete Setup Guide | ✅ | ✅ | ✅ | ✅ |
Fundamentals of Waveform Timing | ✅ | ✅ | ✅ | ✅ |
Diagnostic Tests | ❌ | ✅ | ✅ | ✅ |
Troubleshooting Guide | ❌ | ✅ | ✅ | ✅ |
Daily Practice Routines | ❌ | ❌ | ✅ | ✅ |
Subdivision Control Drills | ❌ | ❌ | ✅ | ✅ |
Rudiment Mapping & Analysis | ❌ | ❌ | ❌ | ✅ |
Advanced Subdivision Systems | ❌ | ❌ | ❌ | ✅ |
Time Independence Building | ❌ | ❌ | ❌ | ✅ |
Free Future Upgrades | ❌ | ❌ | ❌ | ✅ |
Exclusive Coaching Access | ❌ | ❌ | ❌ | ✅ |
Price | $0 | $19 | $49 | $99 |
Your 100% Risk-Free Guarantee
Try Locking In for 30 days. If you don't feel a dramatic improvement in your timing and confidence, I'll send you a full refund. No questions asked.
Purchase Here
Lite
Starter
Core
Advanced
Great Rhythm Isn’t a Gift... It’s a Skill You Can Build
“Locking In” shows you the truth,
trains you with certainty,
and gives you confidence under pressure.
Every percussionist knows the feeling...
you’re playing the notes,
but you’re not sure if you’re really with the pulse.
The conductor cuts off and you wonder: Was I early? Late?
...Or just lucky?
Instead of confidence, you’re stuck second‑guessing.
“Locking In” changes that.
This guide walks you through setting up a simple $6 app and leveraging its hidden beat‑tracking feature...
giving you clear, repeatable feedback you can use right away.
No fancy gear, no confusing software.
Just a straightforward system that reveals the truth about your timing and helps you fix it on the spot.
With each session, you’ll feel the shift...
notes that lock in,
rhythms that stay steady,
and the quiet relief of finally trusting yourself.
Perfect instincts aren’t what make great percussionists.
A reliable system does.
And once you have it, confidence follows naturally.
Be the player your section can count on... steady, confident, and unshakable.
Rusher or dragger?
With ‘Locking In,’ the answer is simple: neither.
You’re Not Lacking Rhythm... You’re Lacking the Right Tools
Built on a $6 app you can download today,
“Locking In” turns timing into
something measurable, trainable, and reliable.
For the analytical player, it delivers proof.
For the expressive player, it delivers peace of mind.
This enables both players to have the best of both worlds...
and achieve their goals!
Objective feedback, not opinions
Waveform analysis shows exactly where every note lands... ending the doubt of “was I rushing or dragging?”
Training that compounds into mastery
Step‑by‑step routines build subdivision control and precision over time... no more hoping you improve, just reliable skill growth.
Diagnostics that expose the hidden habits
Structured tests like the Clapping Test reveal micro‑timing tendencies with clarity you can’t get from a teacher’s glance or a metronome click.
Progress you can measure and feel
Every session gives you visual proof on screen and audible improvement in your sound... the science matches what your ears want to hear.
Corrections that solve problems at the root
Targeted troubleshooting gives you specific fixes for shaky rolls, dragging transitions, and off‑balance downbeats... so flaws don’t keep resurfacing.
Confidence that protects your artistry
When you know your timing is reliable, expression no longer feels like sloppiness... it feels like freedom.
Who Is This For?
-
High school or college percussionists preparing for auditions, juries, or ensemble placements — players who want rock‑solid timing they can prove under pressure.
-
Marching percussion and DCI hopefuls chasing absolute clarity on whether they’re rushing, dragging, or truly in time.
-
Adult community band and orchestra drummers who are tired of second‑guessing their entrances and just want to feel confident when the baton drops.
-
Band directors and teachers looking for a proven, structured system they can hand to students to eliminate timing confusion once and for all.
-
Any percussionist who’s done with guessing — and ready to finally trust their own sense of time.
Whether you’re walking into rehearsal, onto the field, or into an audition room, “Locking In” gives you the clarity and confidence to know your timing will hold up.
Frequently Asked Questions
Do I need to buy anything else for this system to work?
Yes. Locking In is a training guide that teaches you how to use the hidden advanced features of the TonalEnergy Tuner & Metronome app.
The app is a separate, one-time purchase of about $6 on the Apple App Store and Google Play Store and is required for the system to work. There is also a desktop version that is available!
Is this a video course or a book?
Locking In is a comprehensive digital PDF guide that you get instant access to after purchase.
The Advanced Edition also gives you the option at checkout to purchase a spiral-bound printed copy for your practice room.
Does this system work for beginners?
Absolutely. The system is designed for any dedicated musician who wants to improve.
The Starter Edition is perfect for beginners, as it covers the complete setup and fundamental diagnostic tests to get you started.
I'm a serious, advanced player. Is this for me?
Yes. The Advanced Edition was written specifically for highly motivated players and educators who demand mastery.
It includes advanced systems for training complex rhythms, rudiment mapping, and building true time independence.
What if I try it and it doesn't work for me?
I'm confident this system will bring a new level of clarity to your practice.
However, if you're not completely satisfied, every purchase is backed by a 30-day, no-questions-asked money-back guarantee.
About the Creator
Created by Spencer Perilloux
Professional percussionist, educator, and mentor with the Detroit Symphony Orchestra’s Civic Youth Ensembles. Spencer holds degrees from the University of Michigan and Central Michigan University and is known for his no-nonsense, physics-informed approach to percussion technique.
“I made this for people like me—who wanted to understand what they were doing, not just memorize exercises.”
