Dragon Drum Machine

Dragon is a drum machine built to quickly and easily make glitch, distorted, lofi drum beats and manipulate them live. The drums are simple and flexible, capable of some classic drum machine sounds and also new weirdness. Each is synthesized in real time and sent to a multi effect rig with variable speed stutter, bit reduction, pitched feedback delay, down-sample, reverb, and a resonant bandpass filter. The drums are triggered by a four pattern step sequencer. Patterns can be changed individually for each drum or triggered together for quick pattern switches for all drums.

Features:

Four pattern sequencer with local and global pattern control

BPM control with nudging

Save/load presets

Record audio as wav

Three drum synths:

-Bass-similar to 808 with more consistent pitch

-Snare-similar to 909 with added fm and delay

-Hi-hat-two tones and noise with fm

Effects rig:

-Asymmetry and tanh(x) for tape like distortion

-Pitched feedback delay

-Retrigger (aka stutter/buffer) with variable speed and reversing

-Bit reduction

-Down-sample

-Reverb

-Resonant bandpass filter

Preset management and wav export requires permission for file storage read/write

Unpaid version disables preset saving and audio recording

Possible future ports to desktop and ios. Made with Pure Data and libGDX. Any questions, concerns, or creations, please contact

Full parameter and effect reference:

SYNTH PARAMETERS

Bass drum-

Freq: Frequency. Locks into semitones so you can harmonize easily

Decay: Amplitude decay

Freq Env Dec: Frequency envelope decay. Changes how fast the pitch drops

Freq Env Amt: Frequency envelope amount. Changes how much the pitch drops

Noise: Noise burst for click

Amp: Bass drum amp

Snare drum-

Tone Low Dec: Tone low decay

Tone High Dec: Tone high decay

Noise Dec: Noise decay

FM: Frequency modulate the low tone by the high tone

Freq: Frequency. Locks into semitones so you an harmonize easily, though fm and the high tone potentially bring inharmonic tones

Freq Env: Frequency envelope. Changes how much the pitch drops

Delay: Feedback delay

Delay ms: Milliseconds of delay

Tone Distance: Distance between low and high tones

Amp: Volume of snare

Hi-Hat-

Freq: Frequency

FM: Frequency modulate the tone

Tone Dec: Tone decay

Tone Amp: Tone amplitude

Noise Dec: Noise decay

Noise Amp: Tone amplitude

EFFECTS

Retrig: Loop audio by the specified time interval (bottom box) within the range of another time interval (top box)

Rev: reverse retrigger’s playback

Speed: control the speed of the retrigger’s playback

Bit Red: Bit reducer. Mixes in a low bit signal

BP Filt: Band-pass filter. All the way left is off

Tanh: Amplifies and the waveshapes the signal through a hyperbolic tangent curve. Creates a tape-like distortion

Asym: Adds to the signal, creating a DC offset. Needs Tanh turned a bit for a significant effect

Down Samp: Down-sample the signal

Reverb: Mixes in reverb signal

Delay: Pitched feedback delay dry/wet

Delay ms: Milliseconds of delay

Freq: Adjust the pitch that the delayed signal is adjusted by. Also locks into semitones (0-12)