Dragon Drum Machine

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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 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.

Play store:

Demo version | Full version

Amazon Marketplace: Full

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
-Snare
-Hi-hat
Effects rig:
-Asymmetry and tanh(x) for tape like distortion
-Pitched feedback delay
-Retrigger (aka stutter/buffer) with variable playback speed, rate, windowing, and reversing
-Bit reduction
-Down-sample
-Reverb
-Resonant band-pass 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

Facebook page: Dragon – Synthesized Drum Machine

Postings: MatrixSynth | Musical Android (preview) | Discchord | KVR Audio | Musical Android | Rekkerd

Full parameter and effect reference:

SEQuencer

Dot: Make rate dotted (1.5 x length)
Trip: Make rate a triplet (2/3 x length)
Len: Length of steps played. Lengths greater than steps will be wrapped around, ie if the length is 12 and the steps are 8, the 9th through 12th steps would be the 1st through 4th, so the steps played would be 1 2 3 4 5 6 7 8 1 2 3 4

SYNTH PARAMETERS

Bass drum

Freq: Frequency. Locks into semitones so you an 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 overtones from fm and the high tone 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 (rate) which is timed according to window, ie if 1/8 window and 1/16 rate, the last 1/8 note of audio will be played back at 1/16
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. Doesn’t do much unless you have Tanh turned a bit
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