Feature

The Crash Test: a guitar diagnostic calibrated to your hand

The Crash Test is where RIFFLEX starts. It doesn’t measure your level: it pinpoints the exact motion slowing you down, taking the shape of your hand into account.

Why the tabs are calibrated to your hand

The same tab doesn’t ask the same effort of a small hand and a large one. If a stretch was designed for someone else’s hand, you end up measuring your anatomy instead of your technique.

So the Crash Test starts with a scan: a few questions about how you play (left- or right-handed, sitting or standing), then the camera measures your hand width and finger spread. The tabs are then transposed to the area of the neck that suits your measurements. What gets measured is your block, not your anatomy.

My profile page: photo of a flat hand next to a 20-cent coin, every finger length and every gap drawn and measured in centimetres, then listed in the Sizes and Gaps tables.

The scan result, saved in your profile: handedness, position, the length of each finger and the gap between each pair of fingers, stretched, curled and slanted. The coin is the scale used to turn pixels into centimetres.

How the test works

The first Crash Test covers legato. It moves through stages where only one difficulty changes at a time: finger combinations, stretch, string change, position shift, string skipping.

For each exercise, you play along with the built-in metronome and push the tempo up. The BPM you reach and the number of attempts you need are recorded. Comparing those results is what makes the diagnostic speak.

Legato Crash Test stages page: intro video, then each stage (finger combinations, 31 exercises; stretch, 28 exercises) with its list of exercises, one exercise with its target missed in red, and the See my diagnostic button.

The legato Crash Test split into stages. Each stage groups its exercises; those whose target was missed stand out in red, and each finished stage opens its own diagnostic.

Crash Test screen, diagnostic 1: trail of 31 exercises, index-pinky hammer-on tab on the low E string, metronome at 60 BPM with the Start the test, Stop I’m stuck, Score and Resume later buttons.

A Crash Test exercise, the way you play it.

Exercise trail
Exercise 1 of 31: one dot per stage, the motion being tested (here hammer-on and pull-off, fingers 1-4) and your attempt number.
Calibrated tab
The frets are picked from your hand measurements, not for an average hand.
Metronome
Starts at 60 BPM and adds 5 BPM every loop, up to 120 BPM.
Start the test
Starts the count-in, then the exercise.
Stop, I’m stuck!
Press it as soon as you can’t keep up: the tempo reached is saved for the report.
Resume later
Pauses the diagnostic: you pick it up where you left off.
Crash Test control bar for a visitor: score and metronome balance, transposition, count-in, preview and notation options, no video buttons.

Greyed-out buttons belong to higher plans: you can see them, and they turn on with the matching plan. Video settings light up once you open the video band; a visitor without an account has no video.

Score / metronome balance
The round knob balances the score volume (the note, left) against the metronome click (the tuning fork, right).
Transposition
− and + lower or raise the score sound by a semitone, without changing the tab.
Count-in
One bar of clicks before you start, to lock into the tempo.
Play the score
Lets you hear the exercise at its tempo before playing it.
Score background
In video mode: white, black or no background behind the score, so it stays readable over your webcam.
Tab colour
In video mode: white or black tab, depending on your picture.
Bar-by-bar scrolling
In video mode: the score moves one bar at a time instead of scrolling continuously. Shredder and above.
Your logo
In video mode: replaces the RIFFLEX logo with yours. VIP and above.
Notation options
Opens the side bar that shows or hides score elements (detailed below).
Record
Opens the video band: your webcam under the score.
System audio
Adds the score and metronome sound to the video, on top of your microphone.
Format
Switches the video between vertical (mobile networks) and horizontal.
Download
Gets the video once the recording is over.
Notation options bar for a visitor: tempo, dynamics, pick strokes, hammer-on and pull-off, palm mute, track name, layout and zoom.

The notation options side bar, opened from the control bar. The position settings only show up in video mode.

Tempo
Shows or hides the tempo marking on the score.
Dynamics (mf)
Shows dynamics: f, p, mf…
Pick strokes
Shows the direction of each stroke, down or up.
Hammer-on, pull-off, tapping
Shows the H, P and T letters above slurred notes.
Palm mute (P.M.)
Shows muted passages.
Track name
Shows the instrument name at the start of the staff.
Staff + tab
Switches between standard notation with the tab, or the tab alone with rhythm.
Zoom
Enlarges or shrinks the score; the factor shows between the two buttons.
Move up / down
In video mode: moves the score inside the band to place it where you want over your picture.
Cursor position
In video mode: crops the top and bottom of the score to keep only the staff you need.

What you get at the end

A report where each chart answers a question: which finger combination limits you most, which motion costs you the most BPM, on which strings your motions are hardest, which stretch costs you the most speed.

A score out of 100 that breaks your performance down into readable factors: speed, finger independence, consistency, endurance and anatomical margin.

Then a library of measured exercises, sorted by block, so you can work on exactly what your report reveals.

Your report screen for diagnostic 1: legato score of 76 out of 100 with four stars, then the Which finger combination limits you most and Which technique costs you the most BPM charts, each with its answer.

Your report: a score out of 100 (with how it’s calculated), then a series of charts. Each one asks a question and answers it in one sentence, drawn from your tempos.

Which finger combination limits you most chart: one bar per fingering by tempo reached, coloured by notes per string; answer: the 1-4 fingering slows your progress the most.

A few report charts: each answers a question, with the answer written in green under the title.

Training page: one card per technique (strict alternate picking, legato, sweep picking…) with a tab excerpt; the Legato card shows Program ready (10 exercises), the others invite you to take a Crash Test.

After the Crash Test, the diagnosed technique shows your program: here, 10 legato exercises picked from your report. Techniques not yet assessed invite you to take their Crash Test.