MATRIXSYNTH

Musikmesse 2013 Visiting Synthesizer Magazine's Synth Museum

New video added to this post.

Koinonia Music Festival Location Change in Berkeley Tonight

See the update in this post. Mystery Serge Modular will make an appearance.

Roland TR-808 and Minibrute

Published on Apr 20, 2013

"a demo of the minibrutes modulation and lfo"

Minibrutes on zZounds | Minibrutes on eBay

Analogue Solutions Vostok Deluxe Sneak Peak Video

And something in the works:

Bug Brand AudioWeevil08

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

via this auction
Pic of the schematics below.

"The AudioWeevil08 was hand-built in small quantities by Bug Brand Audio Electronics in Bristol and released in October 2008. The units cost £198 and all sold out almost immediately.

Building on the success of the Weevil08, the AudioWeevil08 builds even more features (see the block diagram above) and is both a synth-sound generator and an audio processor - with the usual Bug Brand chaos possibilities thrown in too!

Includes
AudioWeevil08 in dark green
Data sheet/Schematic diagram
Original Bug Brand badge
6 x rechargeable AA batteries
Features

Dark green, slope-mounted case
Battery power only (due to the touch controls) - running off 6 AA batteries in the panel compartment mounted underneath. Bug Brand state that the battery life should be at least forty hours with decent batteries (including rechargeables).
1/4" mono output jack
Audio Input through a CMOS Overdrive/Distortion - a powerful input (1/4" mono jack) suitable for guitar or line levels. There are two levels of drive offering clean or distorted sounds. The distortion crunches really nicely!
Variable Response Wasp-style Filter - the filtering on the AudioWeevil is now full of character! Based on the famous old-school Wasp synth and offering variable Resonance / Q, Cutoff + LFO Modulation and Low/Band/Highpass outputs. There's a mixer going into it for balancing the Thru (Audio Input) and Ring (Weevil Sonics). There's also an output level control before 1/4" mono output jack.
Twin Oscillator Weevil Heart - this is the screechy ringmod centre of synthesis with many features. There are two lo-fi square wave oscillators (one with LFO modulation) with Hi / Lo rate ranges which feed into a quasi-ringmod. The 2nd osc can be switched over to accept the squared audio input for weird-assed ringmod processing. Added onto this are controls for: Power Starvation (with Stable or Instable modes), Ringmod Feedback (with three way routing switch) and an output Comparator to give stable levels even when starved.
Modulation LFO - Osc1 and the Filter can be modulated by the wide-range tri/saw LFO. The two rate ranges offer modulation from superslow to audiorate and the waveform is switchable from Saw to Triangle to Ramp. There are independent modulation depth controls for the Osc and Filter.
Screen printed Frontpanel with Contact Points - the professional frontpanel labels all functions clearly (13 dials, 10 switches) and presents a total of 16 body contact points allowing touchy chaos control of the machine - lick your fingers!
There can often be a bit of weevil-signal feedthrough to the audio input even with the Ring mix turned right down. This is most apparent with high input gains, but various settings can minimize any effects.
Dimensions

22 cm (width)
14 cm (depth)
5 cm - 9 cm (height)

Please note: This is not a 'normal' musical instrument - have a listen to these demo mp3s (recorded straight with no effects) for an idea of the sounds the AudioWeevil08 is capable of:

Sonics just from the internals
Guitar Ebow drone process
TR606 Drum-machine process

The photographs above are of the actual AudioWeevil08 for sale."

Roland MPU101 Midi to CV Converter 561461

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

via this auction

"Controls up to four individual synths with various modes and trigger functions.

For example the 4 voice button will trigger each synth sequentially eg:- if you have four CV synths connected the first note of the midi sequence or arpeggio that is input will be played by synth one, the second note of the sequence or arpeggio will be played by synth two etc... etc... > fifth not will again trigger synth one etc...etc... as you might imagine the range of possibilities are endless and this can produce some very unique
and amazing sequences with the onus obviously on the expertise of the synthesist in question to produce the magic from the various synths connected.

The same type feature also exists for two and three voices if you have two or three synths connected.

MIDI TO CV INTERFACE
The MPU-101 is unique in that it converts MIDI data into analog signals. When the MPU-101 is connected to a MIDI sending unit, a conventional 1 –
volt/octave Cv/gate synthesizer such as the SH-101, SH-2, SH-5, SH-07, System-100M etc... can be controlled by MIDI data.
Other voltage-controlled devices can also be controlled. For example, you can automatically synchronize lighting equipment with your performance.
The gate signals can also be used as trigger signals to control a percussion sound source like the Boss PC-2 or HC-2, a sampling unit such as the Boss DSD-2, or a digital delay, for example the Boss DE-200.
The MPU-101 can expand your MIDI system's potential just as much as your imagination allows.
The MPU-101 has four output channels, each with pitch control voltage, gate signal, and dynamics control signal outputs. Up to four CV synthesizers can be controlled by MIDI data.
ln addition to the key information, other MIDI data including velocity. bender modulation, after touch, and volume information is converted into analog signals. Complicated MIDI data can completely be converted.
The MID channel can be assigned to one of 1 to 16.
Five operation modes are provided for a variety of applications.

1. Mono Mode: Four CV synthesizers can be controlled by MIDI data transmitted on four different MIDI channels.
The bass, melody, and other parts of a composition played by different CV synthesizers can be controlled by MIDI data transmitted on different MIDI channels.

2. 2-Voice Mode: MIDI data for up to two notes is converted into CV/gate signals and comes through outputs 1 and 2.

3. 3-Voice Mode: MIDI data for up to three notes is converted into CV/gate signals and comes through outputs 1, 2, and 3

4. 4-Voice Mode: MIDI data for up to four notes is converted into CV/gate signals and comes through outputs 1, 2, 3, and 4.

5. Special Mode: MIDI data for the highest note, the lowest note. and the latest note is converted and comes through different outputs.

A MIDI Out jack is provided in addition to the MIDI In and Thru jacks. Up to 8 CV synthesizers can be controlled by combining two MPU-101's.

When the connected MIDI sending unit is in the poly mode, three different assign modes are accessible, then the MIDI key information can be assigned to four outputs in three different ways. An Octave

Transpose function simultaneously shifts the pitch control voltage of four CV outputs one octave up or down.

A Gate Indicator on each output channel confirms the flow of the gate signals."

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KORG Synthe-Bass SB-100 SN 780062

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

via this auction

"Korg's Synthe-Bass (model SB-100) is a small 2-octave monophonic bass synth that has a very fat sound. It has one oscillator, an AD Envelope and a low-pass filter. No LFO, no arpeggiators or sequencers and certainly no memory. Small and portable, it comes in a brief-case design. Unlike many portable synths of the time, it features full size keys."