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ALM-015 - ‘Akemie’s Taiko’

Background & Caveats 

Akemie’s Taiko uses a vintage ‘new old stock’  Yamaha YMF262 (aka OPL3) chip as a 

sound source and exposes operator parameters to both voltage and direct control. It is 

able to produce multiple voice 2 or 4 operator FM based sounds from 6 algorithms and 

7 selectable waveforms. This is very similar in audio capability to the Yamaha DX100,  

DX21 or TX81Z synthesisers.  The Taiko also takes some specific influence from the 

Simmons SDE drum module which was FM based.  

Using an original chip gives a very authentic and special sound that has never been 

put under direct modular control before. This allows easy, fun and painless exploration 

of FM sounds that was not really possible with the heavy, menu bashing small-screen 

style of programming the FM synths of the 80s.  

However, using an original chip imposes some limitations, some of which become 

more apparent with such direct control. Expect some ‘stepiness’ and potential low level 

clicks when changing certain parameters.  

Also the chip produces a very low level high frequency tone - some attempt is made 

to filter this out, but not over aggressively as to change the modules overall tone. If this 

is unacceptable it is advised the output is low pass filtered or gated. A high quality 

power supply with plenty of headroom is also recommended. 

Embrace and enjoy these limitations. 

!

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Summary of Contents for Akemie's Taiko

Page 1: ...ALM 015 Akemie s Taiko ALM 015 Akemie s Taiko Operation Manual V0 1 ...

Page 2: ...Introduction 3 Technical Specifications 3 Background Caveats 4 Core Operation 5 Panel Layout 5 General Usage 6 Appendix I Reference 8 APPENDIX II Calibration 10 Limited Warranty 11 Support 12 2 ...

Page 3: ... FM parameters including algorithm selection operator release envelopes ratios waveforms feedback This gives a massive range of unique sounds The voice is able to track 1 volt per octave allowing it to be used for melodic lines as well as percussion Also optional frequency ramps can be enabled for additional audio effects The drum voice includes a trigger input as well as accent and choke trigger ...

Page 4: ...r been put under direct modular control before This allows easy fun and painless exploration of FM sounds that was not really possible with the heavy menu bashing small screen style of programming the FM synths of the 80s However using an original chip imposes some limitations some of which become more apparent with such direct control Expect some stepiness and potential low level clicks when chan...

Page 5: ...d white knob have a separate attenuator or attenuverter The white knob acts as an offset to which any incoming control signals are combined with post attenuation 5 Out V Oct V Oct Freq Start Freq End Release 1 Choke Trigger Acc Algo Speed Release 2 Waves Fb Ratio Release envelope control section FM Algorythm control section Oscillator control section Trigger Accent and Choke trigger Inputs Operato...

Page 6: ...lating at differing frequency ratios over time at decreasing levels release envelope The base frequency tracking 1 volt per octave can be made to rise or fall and roll over on itself to a final end frequency with a set speed to produce siren type sounds or further FM like modulation This maps to each control as follows Algo Selects 1 of 6 operator algorithms The initial 2 being 2 operator and the ...

Page 7: ...ency to the end frequency then reseting back again if the envelope is still open Increasing values mean a faster transition Freq End The end frequency Roughly tracks 1v per Octave All input and control values are snapshotted when a trigger is received once a drum hit is playing the controls have no effect on its sound the choke trigger input however does have an effect in stopping the sound This i...

Page 8: ...ndix I Reference The 6 algorithms are as follows The release controls map to each operator as follows 2 Operator Release 1 1 Release 2 2 4 Operator Release 1 1 3 Release 2 2 4 8 1 4 3 2 1 4 3 2 1 4 3 2 1 4 3 2 1 2 1 2 1 3 5 2 4 6 ...

Page 9: ...ALM 015 Akemie s Taiko Waveforms 9 8 logarithmic sawtooth Derived Square 7 Square 6 Camel Sine 3 Abs Sine 4 Pulse Sine 5 Alternating even Sine 1 Sine 2 Half Sine ...

Page 10: ... back of the module To calibrate apply 1V to v oct input of oscillator you want to adjust Now tune the oscillator via front panel course and fine controls to C1 Next change the input voltage to 3V and now adjust trimmer on reverse until you get C3 You may want to use a bigger or different voltage interval You can use a Beasts Chalkboard as a stepped voltage source but you could also use a sequence...

Page 11: ...of ALM This does not apply to Physical damage arising for mistreating i e dropping submerging etc Damage caused by incorrect power connections Overexposure to heat or direct sunlight Damage caused by inappropriate or mis use Use of incorrect or non official firmware No responsibility is implied or accepted for harm to person or apparatus caused through operation of this product By using this produ...

Page 12: ...pport For the latest news additional info downloads and firmware updates please visit the ALM website at http busycircuits com and follow busycircuits on twitter Please send any questions or comments to info busycircuits com 12 ...

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