To convert MIDI to Bytebeat, you must translate the MIDI file into a mathematical function of time. Here is the fundamental approach: Let t represent the current sample index. If your MIDI file has tempo BPM and sample rate SR , then the elapsed seconds is t / SR . The position in the MIDI timeline is (t / SR) * (BPM / 60) in beats. 2. Encoding Pitch MIDI notes are logarithmic. Note number 69 = A4 = 440Hz. To get a frequency ratio, we use: freq = 440 * 2^((note - 69)/12) .
Whether you are a demoscene coder fitting a symphony into 256 characters, a glitch artist seeking unpredictable rhythms, or a curious musician, the path from MIDI to Bytebeat opens a door to a universe where every sound is a formula waiting to be solved.
# This is a simplified placeholder - a full converter requires # tracking tempo changes, active notes, and envelope generation. # The output would be a stream of bytes representing the mixed waveform. midi to bytebeat
The most common technique uses a piecewise function:
for (int t = 0; t < total_samples; t++) double time_sec = t / 44100.0; update_midi_events(time_sec); // Checks noteOn/Off float mix = 0; for (auto ¬e : active_notes) double freq = 440.0 * pow(2.0, (note.pitch - 69)/12.0); mix += sin(2 * M_PI * freq * time_sec); mix /= active_notes.size(); // Normalize output_byte = (unsigned char)((mix + 1.0) * 127.5); printf("%c", output_byte); // Raw bytebeat stream To convert MIDI to Bytebeat, you must translate
Yet, for the adventurous sound designer, converting is not just a technical exercise; it is a philosophical bridge between human-composed structure and the chaotic, fractal beauty of raw computation. This article explores why you would want to convert MIDI to Bytebeat, the mathematical mechanics behind it, and the practical tools to make it happen. Part 1: Understanding the Two Worlds What is MIDI? MIDI is a sequence of instructions. It tells a sound module when to turn a note on, which pitch (0-127), how hard (velocity), and when to turn it off. MIDI does not contain sound; it contains gestures . It is linear, precise, and deeply human in its design. What is Bytebeat? Bytebeat is the practice of writing short mathematical expressions (often in C or JavaScript syntax) that are evaluated for every sample t (time). For example, the classic formula (t>>4)|(t&t>>5)&63 produces a crunchy, chiptune-like rhythm. Because t increases from 0 to 44,100 per second (at CD quality), the formula generates a stream of bytes (0-255) that are sent directly to your sound card.
import numpy as np import mido def midi_to_bytebeat_array(midi_file, sample_rate=44100): mid = mido.MidiFile(midi_file) ticks_per_beat = mid.ticks_per_beat total_samples = int(mid.length * sample_rate) output = np.zeros(total_samples, dtype=np.uint8) The position in the MIDI timeline is (t
In Bytebeat, we generate pitch by wrapping a phase accumulator: sine(phase) or a triangle wave. The phase increments by freq / SR . Because Bytebeat cannot have conditionals that depend on a sequencer's state (unless you hardcode timing), the conversion process usually involves pre-rendering the MIDI to a lookup table or generating a massive polynomial that encodes note durations.