alm-busy-circuits-akemies-taiko

ALM Busy Circuits Akemie's Taiko

Authentic Yamaha OPL3 FM drum voice for Eurorack

18 HP Eurorack module

Akemie's Taiko is an authentic FM synthesis drum voice built around a vintage Yamaha YMF262 (OPL3) chip, offering 6 algorithms, 8 waveforms, and direct CV control over operator parameters. It produces percussive hits with accent and choke inputs, and can also track 1V/oct for melodic use. The module delivers a wide palette of sounds from classic 80s FM drum tones to wild siren-like frequency sweeps.

Features

  • Yamaha YMF262 (OPL3) FM synthesis chip — authentic vintage sound source
  • 6 selectable FM algorithms (2 two-operator, 4 four-operator)
  • 8 selectable waveforms: Sine, Half-Sine, Abs Sine, Pulse Sine, Alternating Sine, Camel Sine, Square, Logarithmic Sawtooth/Derived Square
  • Approximately 64 waveform combinations across operators
  • CV control over Algo, Release 1, Release 2, Waves, Ratio, Feedback, Freq Start, Freq End, Speed
  • 1V/oct pitch tracking across approximately 5 octaves on both Freq Start and Freq End
  • Trimmer on rear of module for V/oct calibration
  • Optional frequency ramp from Freq Start to Freq End with variable speed
  • Trigger input for percussive hit (approx +3V rising edge)
  • Accent trigger input to emphasise hit volume
  • Choke trigger input to immediately stop sound
  • All input/control values snapshotted at trigger — no mid-note parameter changes

Controls & Jacks (33)

  • Waves— Selects waveform combination for operators. Approximately 64 different combinations available. White knob offset control.
  • Freq Start— Coarse tuning of base frequency (Freq Start).
  • Freq Start Fine— Controls release envelope curve of operator 1 (and 3 in 4-operator modes). 16 discrete steps from tens of milliseconds to many minutes. Whit
  • Release 2— Controls release envelope curve of operator 2 (and 4 in 4-operator modes). 16 discrete steps from tens of milliseconds to many minutes. Whit
  • Ratio— Controls integer frequency ratios between operators. Generally increases as knob turns clockwise. White knob offset control.
  • Algo— Selects one of 6 FM synthesis algorithms. First 2 are 2-operator, remainder are 4-operator. White knob offset control.
  • Release 1— Attenuverter for Release 2 CV input. Black thumb pot.
  • Speed— Controls transition speed from start to end frequency. Turning past 9pm enables frequency ramp. White knob offset control.
  • Fb— Feedback on the first operator (0-7 range). Produces more percussive noisy sounds or has little effect in certain combinations. White knob o
  • Waves CV Attenuverter— Fine tuning of base frequency (Freq Start). White knob offset control.
  • Ratio CV Attenuverter— End frequency for frequency ramp effect. White knob offset control.
  • Release 2 CV Attenuverter— Attenuverter for Release 1 CV input. Black thumb pot.
  • Audio Out— Audio output with LED level indication
  • Waves CV— 1 volt per octave end frequency CV input for ramp
  • Ratio CV— CV input for Release 1 envelope
  • Acc— Accent trigger input
  • Choke— Choke trigger input to stop sound
  • Algo CV— CV input for Release 2 envelope
  • Release 2 CV— CV input for waveform selection
  • Freq End— Attenuverter for Waves CV input. Black thumb pot.
  • Output— LED indicator showing output signal level.
  • Fb CV Attenuverter— Attenuverter for Ratio CV input. Black thumb pot.
  • Trigger— Trigger input to initiate drum hit
  • Freq End V/Oct— 1 volt per octave pitch CV input
  • Freq Start V/Oct— 1 volt per octave pitch CV input
  • Release 1 Attenuverter— Attenuverter for Release 1 CV input. Black thumb pot.
  • Release 2 Attenuverter— Attenuverter for Release 2 CV input. Black thumb pot.
  • Waves Attenuverter— Attenuverter for Waves CV input. Black thumb pot.
  • Ratio Attenuverter— Attenuverter for Ratio CV input. Black thumb pot.
  • Fb Attenuverter— Attenuverter for Feedback CV input. Black thumb pot.
  • Release 1 CV— CV input for Release 1 envelope
  • Fb CV— CV input for feedback control
  • Out— Audio output with LED level indication

How-To Guides

  • Classic FM Kick Drum
  • Melodic FM Tom Sequence
  • Siren Sweep Texture
  • Accented Rhythm Groove
  • Choke Hi-Hat Style
  • Evolving Timbre Percussion
  • FM Bass Line
  • Feedback Noise Percussion
  • CV-Modulated Snare Texture
  • Dual Pitch Ramp Effect

Explore the interactive Akemie's Taiko panel on BleepDex — tap any control to learn what it does.

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