Double bass drumming is often discussed in terms of speed.
How fast can you play? Which technique is fastest? Which pedal setup works best?
But there is another way to look at it:
What is actually moving?
Every bass drum stroke is the result of a relationship between the player, the pedal and the returning movement. Different techniques organize that relationship in different ways.
Heel Up, Heel Down, Heel-Toe, Slide and Swivel all offer different movement solutions. Butterfly Double Bass approaches the subject from a broader perspective: not primarily as another foot technique, but as a movement system based on grounding, space, movement and impulse.
Understanding these differences can help a drummer choose movements according to tempo, dynamics, endurance, sound and musical context rather than searching for one universal technique.
For many years, I taught the fundamental principles of different double bass techniques to my students as options – not to tell them which technique was “right,” but to give them the opportunity to experience different movement strategies and discover what worked best for them.
This was also a learning process for me.
At the same time, my teaching life was always connected to my life as a performing drummer. While exploring these ideas with students, I was continuously testing and developing my own playing under real conditions – in rehearsals, recordings and on tour, including extensive live work with Rhapsody and other projects.
The classroom gave me the opportunity to observe different players, different bodies and different movement strategies.
The stage provided another test: what actually works for me through complete rehearsals, concerts and tours?
Over time, these two worlds – teaching and performing – increasingly pointed in the same direction.
That process eventually led to what I now call Butterfly Double Bass.
It was not something I set out to invent as another technique. It developed through years of teaching, observing, playing and questioning my own movements.
That history is also why I prefer not to describe the approaches in this article as right or wrong. They represent different ways of organizing movement.
A bass drum pedal is not a passive surface.
Once a stroke has been played, the pedal returns.
There is already movement coming back.
Every technique therefore has to deal with this returning movement in some way.
The player can actively create each stroke, use the returning movement to help generate another stroke, change the position of the foot, introduce lateral movement or combine several of these actions.
This relationship between player and pedal is one of the fundamental differences between bass drum techniques.
In Heel Down playing, the heel remains in contact with the pedal or the ground while much of the stroke is produced through movement around the ankle.
The heel provides a stable physical reference, and the technique can offer fine control over dynamics and articulation.
Heel Down can also be used for double bass playing. It is not limited to a particular musical style.
Its movement range and available power are different from approaches that involve more of the leg.
An important characteristic is that each note can fundamentally be produced as a new individual stroke.
Heel Up removes the heel from its resting position and allows greater involvement of the leg.
This can produce substantial power and is one reason Heel Up has become common in rock and metal drumming.
The exact movement varies considerably between players. Some use more leg movement, while others progressively reduce the movement as tempo increases and involve the ankle more strongly.
Again, every note can be produced as an individual stroke.
This makes Heel Up highly adaptable in terms of dynamics, movement size and muscular involvement.
At the same time, raising both heels changes the player’s physical relationship with the ground. With the heels no longer providing a stable reference, balance has to be organized elsewhere.
Some players create additional stability by maintaining pressure through the foot and pedal, sometimes leaving the beater against the drumhead after the stroke. This can provide a physical reference, but maintaining that stability requires active muscular involvement.
This is not a question of right or wrong. It is simply part of the movement strategy.
Heel-Toe approaches rapid playing differently.
Rather than producing every note through a completely separate larger movement, Heel-Toe uses different phases of a rocking movement to generate two strokes.
One movement sequence can therefore produce two notes.
Conceptually, this has a clear parallel in hand technique: the idea of producing two strokes within one larger movement cycle can also be found in Push-Pull technique and Double Stroke Rolls. Heel-Toe can therefore be understood as applying a similar two-strokes-from-one-larger-motion principle to the feet.
This can make Heel-Toe highly efficient for rapid doubles and allows the player to reduce the amount of movement required as speed increases.
The important distinction is not simply whether the heel is up or down. It is the way the notes themselves are organized.
Slide follows a related idea but uses a change of position on the footboard.
The first and second strokes of the double occur from different phases and positions as the foot moves along the pedal.
The change of position is therefore not merely a consequence of the technique. It is part of the mechanism used to create the double.
A similar forward movement of the foot can also be found in some forms of Heel Up playing. After an initial stroke from a more forward-foot position, the foot can move further onto the pedal while contact and pressure are maintained. In that sense, the basic sliding movement is not limited to playing doubles – the Slide Technique organizes this movement specifically to produce two strokes.
Like Heel-Toe, Slide provides an efficient way of organizing two rapid strokes within a larger movement sequence.
Swivel introduces a lateral or rotational component into fast bass drum playing.
Instead of thinking exclusively in terms of vertical up-and-down movement, the heel moves from side to side while the foot and leg participate in the rotational movement and the pedal continues its repeated motion.
One of the interesting aspects of Swivel becomes particularly apparent at higher tempos. As speed increases, the movement at the front of the foot can become extremely small. The side-to-side movement of the heel introduces a larger visible movement into this increasingly small motion and can help organize the repeated strokes.
This was one of the things that initially made Swivel particularly interesting to me when I first explored it: rather than trying to make an already small vertical movement work harder and faster, another movement direction was introduced.
For many players, this provides an effective movement strategy for continuous high-speed playing.
Increasing speed does not necessarily mean repeating the same vertical movement faster and faster. Movement can be reorganized.
There is an important distinction between these approaches, but it should not be confused with the traditional drum-set terms Single Stroke and Double Stroke.
In double bass playing, both approaches can still produce an alternating sequence of individual notes – right, left, right, left.
The difference discussed here is how each foot organizes those notes mechanically.
With approaches such as Heel Up, Heel Down and Butterfly, each stroke can be produced from its own movement cycle and individual impulse.
Heel-Toe and Slide can organize two consecutive strokes of the same foot within one larger movement cycle.
So the distinction is not single notes versus double notes.
It is: one stroke per movement versus two strokes per movement.
Both approaches can produce fast, even and musically useful double bass playing. But they do not necessarily produce exactly the same acoustic character.
There is an interesting parallel with hand technique. A passage played as Single Strokes can sound and feel different from the same rhythmic density produced through Double Strokes. Neither sound is inherently better.
They are different articulations created by different movement organizations. The same principle can apply to the feet.
For one musical situation, the sound and feel of individually generated strokes may be desirable. In another, the flow and character created by a two-strokes-per-movement approach may be exactly what the music needs.
Different movement can create different sound – and different sound can serve different music.
Technique is not only about speed and endurance.
Movement also affects sound and groove.
How a stroke is produced can influence its attack, dynamics and acoustic character — but also the way consecutive notes relate to each other in time and feel.
When every bass drum note is produced as an individual stroke, successive notes can be generated from similar movement conditions.
Heel Up, Heel Down and Butterfly can therefore allow the beater to travel through a comparable movement for each note.
Heel-Toe and Slide work differently.
The two notes occur during different phases of the movement and, particularly with Slide, from different positions on the footboard.
The mechanical conditions of the first and second stroke are therefore not identical.
An experienced player can develop a very even result, but the underlying movement — and therefore potentially its sound and feel — remains different.
That can influence beater velocity, dynamics, attack and the acoustic character of the individual strokes.
This becomes especially interesting in modern metal production.
Bass drum triggers and sample-based sounds can make the final output extremely consistent. Acoustic differences between individual strokes can therefore be reduced or effectively replaced electronically.
This creates two separate questions:
How even are the physical strokes?
and
How even does the final bass drum sound?
They are not necessarily the same thing.
Butterfly developed from my experience with these different movement approaches — both in teaching and in my own playing.
It retains an individual impulse for each note, but looks beyond the foot itself.
Instead of treating balance, grounding, pedal return, relaxation and impulse as separate issues, Butterfly brings them together as parts of one movement system.
Its central principles are:
Grounding. Space. Impulse.
The heels provide moving references to the ground rather than remaining permanently raised or permanently planted. The returning movement of the pedal is integrated into the next movement cycle, and the space between impulses becomes part of the technique rather than something that has to be filled with continuous muscular activity.
The aim is not to give the player more things to do.
It is to organize movement so that less needs to be actively created.
This is also why learning the system can initially require attention to more details.
More complex to learn does not necessarily mean more complex to play.
The purpose of understanding the movement in greater detail is ultimately to make playing simpler.
Butterfly doesn’t add another technique, it removes what gets in the way.
Heel Down provides a stable physical reference and can offer fine dynamic possibilities.
Heel Up allows substantial power and flexible involvement of the leg and ankle.
Heel-Toe organizes two strokes efficiently within a rocking movement.
Slide uses changing positions on the footboard to create rapid doubles.
Swivel introduces lateral movement as another solution for continuous high-speed playing.
Butterfly approaches the subject from the perspective of the whole movement system — grounding, space, pedal return, balance and impulse — while retaining an individual impulse for each note.
These approaches do not need to be opponents.
A technique can be extremely effective for one musical task without being the only possible way to play the instrument.
A useful question is:
What does this movement solve?
Double bass technique is often reduced to BPM.
But a drummer has to do more than reach a number.
The player has to breathe, balance, listen, play dynamically, coordinate four limbs and make music.
And double bass playing does not only happen at extreme tempos.
Slow and mid-tempo playing are just as important. At these tempos, every individual stroke has to stand on its own.
For Butterfly, this is particularly important.
Grounding, Space and Impulse are not principles designed only for maximum speed. They are intended to provide a stable and natural movement relationship across the practical tempo range — from slow, powerful strokes through normal and mid tempos to fast continuous playing.
Speed matters.
So do sound, endurance, dynamics, balance, stability and freedom of movement.
Ultimately, technique should make the music easier to express.
How you play is more important than what you play.
And sometimes progress does not come from adding another movement.
It comes from removing what gets in the way.
Butterfly doesn’t add another technique, it removes what gets in the way.
Alex Holzwarth
Butterfly Double Bass – The Movement System
Photo Credits: df-Köln · Ignacio Orrego for Xpansion Producciones ·
Butterfly Logo by Michael Galeza