MATRIXSYNTH

Orbit III - Synthesizer by Wurlitzer

flickr by robo_lasers
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chipPad 1.3 Scenes

chipPad 1.3 Scenes from earsmack on Vimeo.

"chipPad 1.3 includes a new feature called "Scenes" that allows you to capture just about all settings of all tracks and trigger them immediately, all at once. This lets you easily build up tracks, save sections, and then quickly and easily replay the good stuff.

More information at earsmack.com/"
chipPad - Earsmack Music on iTunes
iPads on Ebay

Cyndustries Logicpac Modcan A format synth module

via this auction
"The Logipac module consists of a pair of 3-input, triple-function Boolean Gate sections, and a pair of D-type Flip-Flop sections. All inputs feature our anything-to-logic input circuitry which allows slow-moving waveforms (like sine waves) to behave like logic signals. The only requirement is that they cross +1V somewhere in their cycle.

Logic Gates
The Boolean Gate sections feature 3-inputs rather than the usual 2, which greatly increases their versatility and allows for the patching of more complicated logical functions with fewer modules. The 3-inputs are processed by logical AND, OR, and EXCLUSIVE OR (EXOR) functions simultaneously, and each function has it's own output jack and corresponding LED.

(To use the gates as 2-input functions, just use 2 inputs of the OR and EXOR with input 3 left unused. The AND requires the unused input be patched together with one of the used inputs.)

The 3-input EXOR functions as an odd / even parity generator. If an odd number of inputs are high, the output is high, and if an even number of inputs are high, the output is low. You can cascade this operation into the other EXOR gate and pick up 2 more inputs. You can also use the EXOR function as a logic inverter. Patch one input high and patch the signal to be inverted into another input. Check out the truth (table that is):

Flip-Flops
The D-type Flip-Flops are 1-bit memory storage devices with various ways to acquire the bit and turn it on and off. Applications are best understood by understanding what signals are coming and going.

[Q] and [NOTQ] Q-bar (pronounced Not Q or Q Bar)
These are the outputs. Q is the bit, either on or off and NOTQ is its logical inverse (when Q is on, NOTQ is off and vice-versa).

[S] SET
A high level at this input will latch Q high (NOTQ low)

[R] RESET
A high level at this input will latch Q low (NOTQ high)

Bringing both SET and RESET high simultaneously is undefined and will produce unpredictable results. It's like trying to force a see-saw to be both ways at once. When SET and RESET are brought low again, the one to fall last will be remembered.

[C] CLOCK and [D] DATA
The CLOCK and DATA inputs work together. The CLOCK is edge sensitive and when brought high, the state of the DATA input is latched into Q. That is, Q will equal DATA when CLOCKed.

There, that's not so complicated, is it?
some logic applications -

http://www.cyndustries.com/modules_logipac_app.cfm"

Modcan 20A Pulse Divider / Dual Switch

via this auction
"http://www.modcan.com/modhtml/modules.html

The PULSE DIVIDER section of this dual function module takes an incoming clock or square wave and outputs a division of its frequency. This is useful for producing time based events that are an even clock division. An example use of this module would be to fire an Envelope generator on every second step of a sequence or use in conjunction with the Boolean module to produce unusual rhythms or to use in the audio range to produce sub octaves below a square wave frequency.

Features:
Divides a single pulse input into 2,4,8,16,32,64 and 128 divisions
Can be used as an octave divider in audio range
All seven outputs can be used simultaneously
Ideal analogue sequencer utility module

The second section of this module is a Voltage Controlled switch. When the Gate input is held high the switch passes the X input to the X/Y output. When the gate is low the Y input is switched to output at the X/Y. The opposite can also exist where a signal at the X/Y input can be switched to output from the X or Y jacks

Features:
Switch between 2 inputs to 1 output or 1 input to 2 outputs
Input signals for switching can be modulation voltages, gates and audio

Pulse Divider:
Inputs: 50k ohms
Outputs: 1k ohms
Signal Output: 0-5 V
Signal Input: 0-5 V

Dual Switch:
Inputs: 50k ohms
Outputs: 1k ohms
Signal Output: 5V Pk-Pk
Signal Input: 5V Pk-Pk
Gate Input +5V

Current Requirements:
+20mA at +15V
-15mA at -15V"

Modcan 16A Dual X-Fade / Attentuator

via this auction
"http://www.modcan.com/modhtml/modules.html

This is a module with 2 sections.
The top section is a dual crossfader that does linear cross fading of two input signals.

Cross-fades are accomplished by simultaneously increasing and decreasing the gain of two signals using complimentary VCAs. If only one signal input is used then it works more like a conventional VCA and fades between signal and silence.

Ideal for linear cross fading between two LFO's applied to a filter cutoff or other CV input and for use as a VCA for voltages. This module can be used for audio, but it is best suited for CV processing. For audio cross fading the Vector Fade 34A or VCA Panner 21A is a better choice.

The second section is a separate dual general purpose attenuator

Features:
Dual module
Manual and voltage control of x-fade
Linear response
Additional standard utility attenuator section

Input 5V p-p
Output 5V p-p
CV sens 0-5V"

Modcan Powered Case - old version

via this auction
"this is the old style modcan case. the modules mount on top of the face plate instead of flush. Also, the black frame does not come off in the same way as the newer cases. minor rack rash but the enamel is in good shape w/no scratches. comes w/the IEC power cable but not the cable to connect to other modcan cabinets, Modcan sends you those when you buy an unpowered cabinet

I also have to mention in interest of full disclosure that the PSU has an audible hum. not in the signal path or anything like that.. THE POWER IS CLEAN! .. just the PSU itself puts off a low volume sound. not a noise or a buzz or anything like that.. just a little sound of electricity. it's not something you will hear over any music you are making..."

Roland D-70 demo - Performances 64-73

YouTube via SynthManiaDotCom | August 03, 2010

"A demo of the Roland D-70 Super LA Synthesizer. Performances 64 through 73."

Roland D-70 demo - Performances 74-88

Moog Rogue

via this auction

SN 4090

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1970's Synthesizer Multivox MX-440

via this auction

"Vintage mid-1970's Multivox MX-440 "String & Brass" polyphonic analog synthesizer in Good Condition. Serial Number: 837248 Made in Japan. Came from the estate of a professional keyboard player. Very retro sounding keyboard with distinctive vintage tone."