Dr.Drumset Analog Drum Machine

via this auction
"Handmade Analog Drum box by Mr.AcidMachine!!
USB-Controlled (only triggering). Knobs are hand-controlled!
6 individual output jacks (1/4-inch) plus a Main Mix Output.
7 Analog Drum Sounds:

1. BassDrum(TR-808-style)
2. SnareDrum(TR-808-style)
3. HandClap(808/909/HC-2 style)
4. RimShot(DR-55 style)
5. Cowbell(TR-808 style)
6+7. Open and Closed HiHat(TR-606 style)

It is plug-n-play, no additional software needed!
I have tested it with Ableton Live and the sequencing fun is endless.
The drums correspond to notes C3 to F#3 (MIDI Notes 48-54).
Triggering is velocity-sensitive.
The Tune Knob changes the pitch of both the CowBell and HiHat."


Triggertestdrive (with OverDrive) by mracidmachine

Testing USB to Trigger Box with analog drums by mracidmachine

Dr.Drumset CowBell Tunes by mracidmachine

Dr.Drumset De-tuned CowBell Beat by mracidmachine

Mracidmachine Drumboxes and Juno Audio Demos

"Drumboxes by mracidmachine.com
beatie bop, Bass Drum 909, handclapper, mr.snaredrum, MIDI-TO-TRIGGER, MPS Sequenced by a Roland TR-505 using the MIDI-TO-TRIGGER BOX. A Roland Juno-60 arpeggiator is also triggered by the MIDI-TO-TRIGGER. mracidmachine drum boxes are triggered by the MIDI-TO-TRIGGER box.

Like Mracidmachine on Facebook!"

beatie volume with doggie accompaniment

YouTube Uploaded by MrAcidMachine on Mar 10, 2011

MrAcidMachine on eBay
"Beatie Bop Analog Percussion Synthesizer.
It is also an optical theremin.
It has input jacks for trigger, pitch cv, and volume cv.
The volume and pitch inputs can be used with an expression pedal."

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It was a bassline valentine. [Custom Keytar TB-303]

YouTube via MrAcidMachine | February 15, 2011 | via this auction
MrAcidMachine on eBay
"A new Roland TB-303 Bassline Clone in Keyboard form, complete with carry bag, guitar strap, and batteries. She was my acid techno love for Valentine's day, but now I must let her go. Fully analog ciruitry. Jacks for CV IN, GATE IN, SLIDE IN, ACCENT IN, AUDIO IN(TO THE FILTER) AND AUDIO OUT. Plus there is a built-in speaker."

Update:

acidkeyzpreview2

MrAcidMachine | February 15, 2011 |

"Keyboard version of a Roland TB-303 Bassline Analog Synth.
DIY Clone of analog circuitry, plus an LFO for modulating the filter and triggering the gate. Too much fun to play!"

accent and slide

MrAcidMachine | February 16, 2011 |

"Just testing various combinations of the accent and slide switches on the ACID BASSLINE KEYTAR!! ON EBAY NOW! WOW! HOW NOW BROWN COW!"

Update:
Details and pics:
"This is a one-of-a-kind custom analog synth. It is a clone of the Roland TB-303 Bassline sound generating circuits plus a keyboard for playing enjoyment and a "TEMPO" LFO for triggering the gate and modulating the filter. Buttons and switches for turning on/off the accent and slide. Switches for Gate-On, TEMPO to Gate, SPEAKER ON/OFF, POWER ON/OFF and WAVEFORM SAW/SQUARE. Knobs for TEMPO, TUNING, CUT OFF FREQ, RESONANCE, ENV MOD, DECAY, ACCENT, TEMPO MOD, and VOLUME. 1/4 inch jacks for AUDIO IN (to filter), CV IN, GATE IN, ACCENT IN, SLIDE IN, and AUDIO OUTPUT. It takes a 9V DC adapter or 6 AA batteries. It has a built-in speaker. Sounds great plugged into an amplifier! Excellent through distortion pedals too! Comes with handmade carry bag and a guitar strap. batteries included."

Update: some more info: "The case was a Casio SA-20 keyboard I found at Goodwill. I modified the headphone/speaker circuit board to be louder/better sounding. Then I hand-soldered prototype boards to create the audio generating circuits of the TB-303. I used some different parts than the original, increased the resonance so it can self-oscillate, added an LFO to trigger the Gate and modulate the filter, and added a circuit to make the keyboard work."

Mrs.BassDrum, Mama Maraca, and Dr.Rimshot Clave

YouTube Uploaded by MrAcidMachine on Jul 30, 2011
MrAcidMachine on eBay (RSS)
"3 handmade analog drum boxes by Mr.AcidMachine.
Sorry about the poor sound quality from my camera.
Mrs.BassDrum is based on the TR-808 BassDrum with extra controls.
Mama Maraca is based on the TR-808 Maraca with extra controls.
Dr.Rimshot Clave is based on the TR-808 Rimshot/Clave.
Mrs.BassDrum and Mama Maraca sound pretty much the same as on the TR-808, while Dr.Rimshot Clave sounds a bit different, somewhere between the 808 and 909 Rimshot sounds, yet different and unique.
All 3 can be triggered by an external audio signal, drum pad, or voltage trigger.
All 3 can be powered by a 9 volt DC (negative center) adapter or a 9 volt battery. For sale on ebay tomorrow!! One day only!!"
MrAcidMachine on eBay (RSS)

via this auction
"Up for auction are 3 handmade analog drum boxes by Mr.AcidMachine!! Mrs.Bassdrum, Mama Maraca, and Dr.Rimshot Clave are all included in this auction. All 3 are based on the Roland TR-808 drum sounds. Mrs.Bassdrum and Mama Maraca can make traditional TR-808 sounds plus more with the additional knobs, while Dr.Rimshot Clave sounds somewhere between the TR-808 and TR-909 RimShot and the Clave has a unique tone. Fully analog circuitry folks!! Play on the pads, plug in an external drum pad, a trigger out from a drum machine, or any audio signal to the IN jack to trigger the sound. Enjoy!!

"Mrs.Bassdrum--->
KNOBS: SENS (Trigger Sensitivity), DECAY(can go longer than an 808!), TUNE(sets the pitch), ENV(Pitch Sweep), TONE(level of initial click), and LEVEL(Volume).
SWITCH: Turns the Env Knob on or off to standard 808 setting.
JACKS: Trigger Input (can be an audio signal, drum pad, or voltage trigger) and Audio Output."

"Mama Maraca--->
KNOBS: SENS (Trigger Sensitivity), DECAY(length of sound), NOISE(noise level), FILTER(from lower frequency to high), and LEVEL(Volume).
JACKS: Trigger Input (can be an audio signal, drum pad, or voltage trigger) and Audio Output."

"Dr.Rimshot Clave--->
KNOBS: SENS (Trigger Sensitivity), FILTER(from low frequency to high for the rimshot), TUNE A(sets the rimshot lower pitch), TUNEB(sets the rimshot higher pitch and the clave pitch), and LEVEL(Volume).
SWITCH: RS/CL (switches between the Rimshot and Clave sounds).
JACKS: Trigger Input (can be an audio signal, drum pad, or voltage trigger) and Audio Output.

Powered by a 9 volt battery or 9v DC adapter (negative center like most effect pedals).
Ships within 3 days after payment is received. Shipping insurance included."

3 beatie bop drum synths

YouTube Uploaded by MrAcidMachine on Apr 25, 2011

MrAcidMachine on eBay

Update:

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Beatie Bop New Demo

YouTube Uploaded by MrAcidMachine on Jun 25, 2011
MrAcidMachine on eBay (RSS)
"Some sounds of the new Beatie Bop analog drum synth.
Now in a silkscreened diecast aluminum enclosure.
Powered by a 9v DC adapter (negative center) or a 9v Battery.
Contact mracidmachine@gmail.com if you are interested in ordering one."

SH-101 Acid Housey

YouTube via MrAcidMachine — May 04, 2010 — Demo for this synth on sale now on Craigslist in Seattle.
MrAcidMachine on eBay

mr.snare+beatiebop

YouTube Uploaded by MrAcidMachine on Mar 21, 2011
mracidmachine on eBay - added to Makers section on the right with RSS feed.
"A drum beat using just the Mr.SnareDrum and BeatieBop Analog Drum Synths. I programmed some stereo clicks of different volumes in Ableton Live and sent it out to the trigger inputs on the Drum Synths with a Y-Cable from a laptop headphone jack. Easy way to sequence these analog drums since they can be triggered by voltage OR audio.
Coming to ebay soon..."

Beatie Bob via this auction

"A handmade and unique Analog Drum Synth and Optical Theremin. Create cool spacey sounds, bangin' bass drums, ethereal spookiness and more. It can be triggered by the onboard drum pad, voltage input, or audio input.

KNOBS: SENS (Trigger Sensitivity), DECAY, PITCH, SWEEP (variable from sweeping up to sweeping down),
LFO MOD RATE, LFO MOD DEPTH, and VOL. (Initial Volume).

SWITCHES: Oscillator Shape (Square or Triangle), MOD Shape (Square or Triangle), LFO MOD Range (High/Low Speed),
Light Sensor On/Off (to control the Pitch with Light), "L" for LFO to Trigger the Drum at the LFO RATE.

JACKS: Trigger Input (can be voltage or audio), "P" for Pitch (Control Voltage or Expression Pedal Input), "V" for Volume (Control Voltage or Expression Pedal Input, and Audio Output.

Powered on a 9 volt battery or 9v DC adapter."

beatieboptechnomore

YouTube Uploaded by MrAcidMachine on May 9, 2011

MrAcidMachine on eBay
"Beatie Bop Analog Drum Box / optical theremin."


via this auction

"Beatie Bop Percussion Synthesizer
A handmade and unique Analog Drum Synth and Optical Theremin.
Create cool spacey sounds, bangin' bass drums, ethereal spookiness and more.
It can be triggered by the onboard drum pad, voltage input, or audio input.

Funky analog sounds!!
Now in a slightly smaller, lightweight enclosure.

KNOBS: SENS (Trigger Sensitivity), DECAY, PITCH, SWEEP (variable from sweeping up to sweeping down),
LFO MOD RATE, LFO MOD DEPTH, and VOL. (Initial Volume).

SWITCHES: Oscillator Shape (Square or Triangle), MOD Shape (Square or Triangle), LFO MOD Range (High/Low Speed),
Light Sensor On/Off (to control the Pitch with Light), "LOOP" for LFO to Trigger the Drum at the LFO RATE.

JACKS: Trigger Input (can be voltage or audio), "P" for Pitch (Control Voltage or Expression Pedal Input), "V" for Volume (Control Voltage or Expression Pedal Input, and Audio Output.

Powered on a 9 volt battery or 9v DC adapter."

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mrs.bassdrum

YouTube Uploaded by MrAcidMachine on Apr 4, 2011
MrAcidMachine on eBay
"The bassdrum sound is entirely coming from the Mrs.Bassdrum Box.
The other drum sounds are samples of the TR-808 snare and hihat on the computer. Mrs.Bassdrum is sequenced with short click sounds programmed in Ableton Live coming out the headphone jack on a laptop going into the trigger input on Mrs.Bassdrum. Massive bass is the result !! Mrs.Bassdrum is based on the TR-808 bassdrum circuit, but is powered by a 9 volt adapter or 9 volt battery. Enjoy!! Coming to ebay soon..."

via this auction
"There are 6 knobs:
Sens. (trigger sensitivity)
Tune (pitch control)
Level (volume control)
Decay (length of sound) *twice as long as original 808*
Env (Pitch envelope)
Tone (level of initial click sound)
There is also a switch to turn the Env. to original TR-808 setting.
This makes it easy to get the original 808 sound.
Turn the tune knob near the center for the original pitch.
Then you are off to 808 style heaven.
But you can get much much lower (and higher!)
Mrs.BassDrum is powered by a 9 volt adapter or 9 volt battery.
Triggered by voltage in, audio in, or tap the drum pad.
Fun and scary speaker shuffling!!
Watch your levels!!!"

Mr.AcidMachine Bass Drum 909 Audio Demo

"This is the mracidmachine.com TR-909 Bass Drum box!
Based on the Roland TR-909 bassdrum, this box can go from house to gabber and beyond.
9 knobs to adjust parameters.
It can be triggered by audio or voltage pulse.
The knobs adjust Input Sensitivity, Pitch, Distortion, Output Level, Tune Depth, Tune Decay, Attack, Decay, and Compression.
The level of the input changes the accent amount.
For sale now at mracidmachine.com
Enjoy."

Beatie Bop Analogue Percussion Synth

Note: Auction links are affiliate links for which the site may be compensated.
via this auction

"This is a boutique hand-made synth from the USA. (Website: http://mracidmachine.com/)

It can be played by hand or set into 'loop' mode for drones, but also has CV and gate inputs for external control via analogue sequencers etc.

Runs on standard 9v power (same as most guitar pedals). I don't have an adapter for it as I always use my power brick. Or you could use a standard 9v battery.

Housed in a strong metal case. I have gigged this thing on several occasions and it is very tough and perfect for live experimental sounds. In my experience its great for weird metallic sounds and heavily modulated drones, but not great for low bass sounds."

Mr.AcidMachine USB MIDI to Trigger Box

via this auction
MrAcidMachine (RSS)

"handmade USB MIDI-to-Trigger box by Mr.AcidMachine!! Use it with analog drum circuits and modular synths. 20 output jacks (1/4-inch) that send 1 ms pulses at 5 volts (or higher). It is plug-n-play, no additional software needed! I have tested it with Ableton Live and the sequencing fun is endless. Takes a standard USB B type cable(not included). Powered by USB or boost the trigger voltage with a 9v~15v DC adapter (negative center like most effect pedals)."

Agent C Analog Semi-Modular Synth With MIDI Update

Follow-up to this post where you'll find a drawing of what the unit will look like and some details.  The price has been reduced from $895 to $775, shipping included.  Pictured here 's are the insides in progress.  Below you'll find some new demos - the first six are new.



"These are samples of the Agent C synth by mr.acidmachine.
Available for Pre-Order Now at mracidmachine.com
Features:
2 VCOs (1 Saw, 1 Saw/Square w/PulseWidth), VCF(Bandpass/Lowpass, V/OCT, and can self-oscillate), VCA, Noise Generator(White/Pink), 2 Attack Release generators (loopable), Sample & Hold with Glide, and Glide for the CV IN .
Patchbay with 18 1/4-inch jacks.
MIDI to CV/Gate with note priority button (last, high, low) and channel select button (1-16)."

Mr.AcidMachine Website Now Live

You might remember the Dr.Drumset 808 and 606 style drum synth from this MMTA SYNTHFEST video, and these audio demos.

The Mr.AcidMachine website is now live. Click through for some preview pics of the Dr.Drumset along with other products currently available including the Beatie Bop Percussion Synthesizer pictured below.

http://mracidmachine.com/

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This Boomin Can Self-Oscillate!

YouTube via MrAcidMachine | November 04, 2010

"A Health Club Boomin drum box based on the Roland TR-808 kick drum with mods to self-oscillate when the decay is turned all the way up! Speaker damaging bass, clicks, and blips."

Mr.AcidMachine Midi to Trigger

via Mr.AcidMachine

"MIDI IN--->17 output pulse jacks with programmable main accent level.

The way it works is simple. Plug MIDI OUT from a computer, sequencer, drum machine, or even a keyboard into the MIDI IN on the MIDI-TO-TRIGGER. Incoming MIDI notes send quick pulses to the output jacks from notes C1 to E2. When MIDI is received on F2 it changes the Accent level of all the output jacks simultaneously. There is a knob to control it's level from normal to full-accent. Connect the output jacks to trigger analog drum circuits, envelope generators, arpeggiators, sample and holds or sequencer clocks. Or use the pulses as audio sources and filter them to get some nice click percussion.

The MIDI OUT actually only serves as a MIDI THRU for connecting other MIDI devices to the MIDI IN.

On power up (9 Volts DC negative center), the MIDI CHANNEL is Channel 1. If the channel button is pressed it changes the MIDI channel to 2, then 3, 4, 5...16, then back to 1 for each press.

These are currently handmade and take 2 to 6 weeks to ship after they are ordered.
Send any questions to mracidmachine@gmail.com"

The Percussion Beatie Bob also got a slight make over with a blue and white silkscreen label.

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New Mr.AcidMachine Dr.Drumset Audio Demos & Pics

"This is the sound of the upcoming Dr.Drumset MIDI-controlled analog drumbank. There are 13 analog sounds reminiscent of the Roland TR-808. Inquires welcome. mracidmachine@gmail.com"

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