METASONIX RK1 NoiseDrum User manual

RK1 NoiseDrum
user's manual
Copyright 2015 Metasonix. All rights reserved.
Please read all of this before using it!
RETAIN INSTRUCTIONS: The safety and operating instructions should be retained for future reference.
EED WARNINGS: All warnings on the RK1 and in the operating instructions should be adhered to.
FOLLOW INSTRUCTIONS: All operating instructions should be followed.
WATER AND MOISTURE: The RK1 should not be used near water (e.g. near a bathtub, washbowl, kitchen sink, laundry tub, in a wet
basement, near a swimming pool etc.). Care should be taken so that liquids are not spilled onto or near the enclosure.
VENTILATION AND COOLING: The RK1 normally operates warm to the touch. The tube and a zener diode inside the module
generate considerable heat. It MUST be situated so that its location or position does not interfere with convective cooling. The RK1
MUST NOT be used on a bed, sofa rug or similar surface which may prevent proper cooling. It is NOT a toy. If the RK1 is mounted
in a synthesizer rack or other built-in installation, space must be left around it to allow convection cooling. Use great caution if
handling the RK1 when it is powered up.
EAT: The RK1 MUST be situated away from heat sources such as radiators, heat registers, stoves, or other devices (including
power amps) that produce heat.
POWER SOURCE: The RK1 should be connected to a power supply ONLY of the type described in the operating manual or as
marked on the RK1. WARNING: Each RK1 requires +12v at 300 mA and -12v at 10 mA, with a brief transient consumption of 800 mA
at first power-on. The cabinet power supply must be able to deliver this current. Many switch-mode power supplies will have
difficulty powering Metasonix tube modules. WARNING: The tube gets hot in normal operation and should not be touched after 10
minutes with power applied.
CLEANING: The RK1 should only be cleaned with a soft cloth moistened with water. Disconnect all possible power supplies before
attempting to clean or handle.
NON-USE PERIODS: The RK1 should be shut off when left unused for a long period of time.
MEC ANICAL: protect the RK1 vacuum tube from damage. Use of a Eurorack cabinet with a removable lid tall enough to protect
the tube is recommended, if the synthesizer is to be moved or transported.
DAMAGE OR TUBE REPLACEMENT REQUIRING SERVICE:
The RK1 should be serviced by qualified service personnel when:
--The power supply has been damaged;
--The RK1 has been dropped, physically damaged, or subjected to force;
--Liquid has been spilled onto the RK1 or it has been exposed to rain;
--The RK1 does not appear to operate normally or exhibits a marked change in performance.
SERVICING: The user should not attempt to service the RK1. All servicing should be referred to qualified service personnel.
METASONIX LIMITED WARRANTY and standard legal disclaimer
Thank you for purchasing this Metasonix product. The following terms and conditions apply:
1. Warranty period is for ONE YEAR from date of purchase with proof of purchase submitted. Warranty covers electrical failure of
vacuum tubes and gas-filled tubes, except in cases explained in 3 below.
2. Operating instructions must be followed. This device was intended ONLY for use by AUDIO AND MUSIC PROFESSIONALS.
IT IS NOT INTENDED FOR USE BY ORDINARY ONSUMERS!!
Product must not have been damaged as a result of defacement, misuse, abuse, neglect, accident, destruction or alteration of the
serial number, improper electrical voltages or currents, repair, alteration or maintenance by any person or party other than our own
service facility or an authorized service center, use or installation of non-Metasonix replacement parts in the product, or the use of
this product outside of the U.S.A. or Canada (except as a product distributed by an authorized Metasonix dealer), or modification
of the product in any way, or incorporation of the product into any other products, or damage to the product caused by accident,
fire, floods, lightning, or acts of God, or any use violative of instructions furnished by Metasonix.
3. Obligations of Metasonix shall be limited to repair or replacement with same or similar unit, at our option. To obtain repairs
under this warranty, present the product and proof of purchase (e.g. bill or invoice) to the authorized Metasonix service center,
transportation charges prepaid. When returning the product for repair, please pack it very carefully, preferably using the original
packaging materials. Please also include an explanatory note.
IMPORTANT:
To save yourself unnecessary cost and inconvenience, please check carefully that you have fully read and followed the
instructions in this instruction manual.
This warranty is in lieu of all other expressed warranties, obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR
LIABILITIES, INCLUDING BUT NOT LIMITED TO T E IMPLIED WARRANTIES OF MERC ANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE, S ALL BE LIMITED IN DURATION TO T E DURATION OF T IS WRITTEN LIMITED WARRANTY. Some

states do not allow limitations on how long an implied warranty lasts, so the above limitations may not apply to you. IN NO EVENT
S ALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREAC OF T IS OR ANY OT ER
WARRANTY EXPRESS OR IMPLIED, W ATSOEVER. Some states do not allow the exclusion or limitation of special, incidental or
consequential damages, so the above limitation may not apply to you. This warranty gives you specific legal rights, and you may
also have other rights which vary from state to state.
METASONIX shall not be held liable for any incidental, consequential, or direct damages or expenses associated with the use or
misuse of its products. The audio output of this product is capable of damaging some types of solid-state audio equipment; such
use is entirely at the risk of the user. METASONIX does not guarantee that any of its products are designed for any particular use
or purpose. The entire risk of suitability and performance of this product lies with the user. Products manufactured and/or sold by
METASONIX are not authorized for use as critical components in devices used in life support and other systems whose failure or
performance could result in compromised safety or danger to life or property.
NOTE: All sales are FINAL, especially custom designs. Only a Metasonix authorized dealer is permitted to return products to
Metasonix for a refund or exchange.
What it does:
The RK1 is intended to serve as a “cym al” sound for synthesis of electronic drums. It uses a special selected noise diode to generate white
noise, and a vacuum-tu e pentode to gate the noise on and off. A uilt-in envelope generator allows adjustment of the attack and decay time.
Long attack times will require triggering with a long positive pulse, while “typical” cym al sounds can e made with a short trigger pulse. A
trigger of at least +5 volts is recommended for est performance.
Trigger and CV inputs have 100k ohm impedance. The audio output is a le to drive a 600-ohm load. The CV input affects the DECAY time,
and may e anywhere in the -10v to +10v range – the effective range is +1.5v to +5v.
USAGE
Connect the RK1 to an adequate Euro ca inet power supply. Connect a positive trigger/gate pulse to the INPUT, and connect the OUTPUT
to a monitor amplifier or mixer. (Watch the volume level! The RK1 is designed to put out a very hot audio signal.) Trigger sequencers such as
the ALM Pamela's Workout, Delptronics Trigger Man, Tiptop Trigger Riot, or the trigger outputs of the Doepfer A-155 sequencer may e used
to trigger the RK1. Most of these devices produce short pulses, so the ATTACK control's range will e limited. (If a wider attack range is
desired, you must use a “pulse stretcher” such as the Doepfer A-162 trigger delay efore the RK1. This function is uilt into the Tiptop Trigger
Riot. See the user manual for whichever sequencer is desired. )
Turn ATTACK, DECAY and TONE fully counterclockwise. Allow the RK1 tu e to warm up, then start triggering it. Adjusting DECAY will allow
a full range of ordinary cym al effects (short decay for ride, medium for hi-hat, long for crash), while ATTACK can offer a slow-attack cym al
which is normally impossi le in real-world drumkits. The TONE control is a simple low-pass filter; fully CCW is “white” noise, and fully
clockwise is “red” noise. Various shades of “Pink” are availa le, mostly at the clockwise side of the control's rotation (no, it's not linear).
By gating the RK1 on at all times with a DC voltage, it can e used as a conventional white/pink noise source for other modules. It is also
possi le to process audio through the RK1; feed a VERY hot audio signal to the Trigger input, turn ATTACK and DECAY fully CCW, and you
should e a le to hear the noise signal eing gated y the audio signal. Because the signal is very strong and tu e “squash” distortion
occurs, the RK1 will NOT sound like a conventional solid-state noise source.
MAINTENAN E
The RK1 requires a power supply producing +12v DC at 800 mA cold, and 300 mA after warmup, plus -12v at 10 mA. When first powered
on, the RK1 riefly draws greater current, so e aware of this when using a power supply to run it plus other modules. You MUST assure the
power supply is a le to handle the RK1 load plus the load of other modules. We do not recommend the use of Tiptop microZeus or “Happy
Ending” power supplies, due to their limited peak current capacity. We DO recommend use of the Metasonix RKP power system, which has
ample power capacity to run Metasonix modules.
The tu e in the RK1 is eing run VERY conservatively. It should last for tens of thousands of hours of normal use. Still, the RK1 produces a
lot of waste heat, so we recommend shutting it off when not in use.
UNLESS YOU KNOW EXACTLY WHAT YOU ARE DOING, DO NOT REPLACE OR SUBSTITUTE THE TUBE YOURSELF!
Please note: not all tu es have easily visi le heaters. They were not designed to offer pretty cosmetics. If you can't see a heater glowing, DO
NOT assume that tu e is ad. If you hear an output signal, the RK1 tu e is working. We get many foolish complaints of this type!
TUBE REPLACEMENT: despite their expected long lifetime, the tu e might e damaged or develop faulty internal wiring connections,
requiring replacement. This particular RK1 was shipped, and wired for, a 6CB6 pentode. Other pentodes with the same pinout, such as the
6AU6 or 6AK5, will also work. Do NOT attempt to su stitute other tu e types. 6CB6s are still quite easy to find and are availa le from
distri utors such as Radio Electric Supply (vacuumtu es.net) or Antique Electronic Supply (tubesandmore.com).
If you are confused or have ANY technical questions, feel free to contact us. Please DO NOT ASSUME and if you are not an
experienced technician, DO NOT TRY RANDOM TUBES OR MODIFY T E CIRCUIT IN ANY WAY!
495 N. Main #109, LAKEPORT CA 95453 USA
707-263-5343, [email protected]om, www.metasonix.com