In traditional synthesis, we calculate frequency with floating-point math. In Bytebeat, we prefer integers and bitwise operations for that characteristic "glitch" aesthetic.
Traditional Pitch Calculation: $$f = 440 \times 2^((note - 69) / 12)$$
Bytebeat Pitch Translation: Instead of sine waves, we shape waves using bitwise truncation. A common technique is to map the MIDI note to the bitwise shift factor.
If t is time, a standard sawtooth wave is simply t. To pitch it up, we bitshift right: t >> n.
We can map MIDI Note 60 (Middle C) to a specific shift value (e.g., t >> 8). As we play higher notes, we decrease the shift value (pitch goes up). Lower notes increase the shift value (pitch goes down).
Assume a MIDI track: C4 (MIDI 60) for 1 sec, then E4 (64) for 1 sec, at 8000 Hz, 8-bit unsigned.
Parse:
Pitch mapping using integer divide for square wave: midi to bytebeat
Bytebeat formula (C-style):
t < 8000 ? ((t/32) & 1) * 255 : (( (t-8000)/25 ) & 1) * 255
This is a valid Bytebeat expression (using ternary). To avoid ternary, use boolean arithmetic:
((t/32) & 1) * 255 * (t<8000) + (( (t-8000)/25) & 1) * 255 * (t>=8000)
Before diving into the how, we must ask the why. Converting MIDI to Bytebeat is rarely about "realism." It is about controlled glitch.
Converting MIDI to Bytebeat offers an intriguing exploration into algorithmic music generation. It bridges structured musical data (MIDI) with dynamic, computational sound generation (Bytebeat), allowing for creative and efficient music production techniques. The conversion process encourages a deeper understanding of both the source musical data and the target generative algorithms.
The transition from MIDI (Musical Instrument Digital Interface) to
represents a fascinating shift from high-level musical notation to low-level mathematical synthesis. While MIDI provides the "score" for what should be played, bytebeat acts as the "instrument" itself, born entirely from raw arithmetic expressions. The Conceptual Divide MIDI as Instruction
: Introduced in the early 1980s, MIDI is a communication protocol that sends digital messages (status and data bytes) to trigger notes and sync timing. It contains no actual sound; it simply tells a synthesizer which note to play, how hard, and for how long. Bytebeat as Algorithm Pitch mapping using integer divide for square wave:
: Bytebeat is a form of algorithmic music where audio is generated by a single line of code—typically a formula involving a time variable
. It outputs raw 8-bit samples, creating waveforms through bitwise operations and arithmetic (e.g., (t<<3) | (t>>5) & t Bridging the Two: MIDI to Bytebeat
Converting MIDI to bytebeat involves translating musical events into mathematical variables that can be injected into a bytebeat formula. Frequency Calculation
: MIDI notes are represented by numbers (0–127). To use them in bytebeat, these numbers must be converted into frequencies using the standard formula
. In a bytebeat expression, this frequency determines the "speed" at which the time variable increments or how it is scaled within the function. Polyphony and Modulation
: While standard bytebeat is often monophonic (one sound at a time), developers have created virtual keyboards and tools
that map MIDI input to different variables in a bytebeat string. This allows users to "play" an algorithm like a traditional instrument. Synthesis as Logic Bytebeat formula (C-style): t < 8000
: In this hybrid practice, the MIDI "note-on" event doesn't just trigger a recorded sample; it changes a parameter in the code—such as a bitwise shift or a modulus value—completely altering the texture of the glitchy, lo-fi output.
Converting MIDI to is a process of translating standard musical data into algorithmic math expressions, often used for glitchy, 8-bit soundscapes. While common in experimental synthesis and games like No Man's Sky
, it requires specific tools or coding to map MIDI notes to the math-based waveforms. What is Bytebeat?
Bytebeat involves generating audio using a single mathematical formula (e.g., (t*5&t>>7)|(t*3&t>>10) ) that calculates an 8-bit value for every sample in time ( How to Convert MIDI to Bytebeat
Since Bytebeat is purely code, you cannot simply "save" a MIDI file as Bytebeat. Instead, you use conversion tools or scripts to translate the note data into variables within a Bytebeat formula. MIDI-to-Bytebeat Converters
: Specialized tools can take a MIDI file and generate a complex C-style or JavaScript expression that mimics the notes and rhythms found in the MIDI. Manual Mapping : Advanced users write formulas where a variable (
) is manipulated by the MIDI "number" (note value) to set specific frequencies. Virtual Keyboards : Some web-based composers, such as those on Greggman's HTML5 Bytebeat
, allow on-screen keys to send MIDI values directly into a function for real-time play. Common Applications
(These are patterns — exact code depends on target bytebeat environment and integer width.)