Teisco 60F Vintage Synthesizer

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DOEPFER A-188-2 TAPPED BBD DELAY

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"A-188-2 is another module that is based on a so-called Bucket Brigade Device (BBD). If you are not familiar with BBDs please refer to the A-188-1. There you can find some details about this special type of circuits.

The main difference between A-188-1 and A-188-2 is the type of BBD circuit that leads to completely different module principles and sounds. The A-188-1 uses different single BBD chips with one signal input and one signal output only. In contrast the A-188-2 uses as so-called tapped BBD that has available six outputs - the so-called taps after the BBD stages 396, 662, 1194, 1726, 2790 and 3328. In the A-188-2 we use this special BBD circuit (MN3011) to obtain these module features:

The module has available two separate mixing sub-units. For both mixers the levels and polarities of each BBD output can be adjusted to obtain two different mixtures of the BBD outputs. A new type of potentiometers with center detent and center terminal is used for the BBD mixing controls to have a better feel for the neutral position. Each mixer has a wet/dry control at its output that allows choosing between the pure input signal (original), the BBD mix or anything in between. The two outputs can be treated as stereo outputs but it is also possible to use one of the outputs for other applications (details in the next paragraph).

The A-188-2 has a feedback section available that is very similar to the one in the A-188-1. But as we now have 6 different BBD outputs available 6 different feedback types are possible. The feedback input socket is normalled to the "396" output (not to "1194" as shown in the scheme, the front panel is correct). But by patching the feedback socket to any of the single output sockets another BBD tap can be used for the feedback to obtain different sounds. Even external feedback processing is possible (e.g. with a VCA for voltage controlled feedback). The feedback control has polarizer function, i.e. the neutral position is at the center. Left from the center the feedback signal is subtracted from the input signal, right from the center it's added (negative/positive feedback). Even for this potentiometer the new version with center detent is used.
A special feedback can be obtained if one of the mix outputs is used for the feedback function. In this case for each tap the positive or negative feedback share can be adjusted. This leads to multiple peaks and/or notches in the frequency response of the module.

For each tap of the BBD a separate output socket is available. These sockets can be used for changing the feedback loop - as mentioned above -, for voltage controlled mixing of the taps - e.g. with the voltage controlled mixer A-135 or other applications that require access to each single tap.

The A-188-2 uses the same high speed VCO (HSVCO) for the BBD clock as the A-188-1. The clock and consequently the delay time can be controlled manually (delay control) and by the two control voltage inputs CV1 and CV2. The sensitivity of CV1 is approximately 1V/oct. CV2 is equipped with a polarizer (a new type of potentiometers with center detent). The HSVCO has a clock output available that is normalled to the clock input socket. These sockets can be used to link different BBD modules and to run them with the same clock. But even other applications with frequency dividers (e.g. A-163) or PLL (e.g. A-196) are conceivable. A voltage composed of the manual delay control, CV1 and CV2 is available at the CV out socket, e.g. to control an external clock suppression filter as the A-188-2 is not equipped with such a filter (same as for the A-188-1)." more info on the Doepfer website.

Quasimidi Sirius

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# Polyphony - 28 voices
# Oscillators - 2 osc: 128 synth waves, 365 drum and percussion samples
# Filter - 24dB and 12dB slopes, Hi and Low pass filters with resonance and overdrive
# Effects - FX1: reverbs, stereo delays. FX2: chorus, flanger, delays; vocoder
# Arpeg/Seq - 16 pattern arpeggiator / 7 track sequencer with tap tempo
# Keyboard - 49 velocity sensitive keys
# Memory - 384 patches (288 preset, 96 user), 16 vocoder patches, 20 percussion kits
# Control - MIDI (7 parts, 3 synth and 4 drums)

Roland Juno-106

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Simmons SDS V Drum synthesizer

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"19" rack mount Simmons SDS V drum synth head only, includes bass drum, snare drum, three tom modules as well as master sensitivity & mixer module. Unit is 115vac powered, has xlr trigger ins, xlr individual and mix outs. There is a hi hat xlr in but no module."

HARMONY SYNTHESIZER made by A/DA

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"It measures aprox. 9 X 11 1/2 inches and weighs in at a meaty 6 pounds, 11 ounces. The case is cast metal and is extremely well built. These are hard to find (only 800 were made around 1980)"

CIRCUIT BENT 1983 BONTEMPI MINSTREL

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"The bontempi minstel analogue keyboard was built in 1983 and designed by guigiaro of turin,italy.he interestingly designed the volkswagen golf and the panda/punto for fiat. still functions just as bontempi intended,but now includes 13 modifications...

13 modifications
Custom metal control panel & Wood effect detailing
Chord modulation knob
Low pass filter knob
With on/off switch
(when in use the keys are disabled)
Rhythmic drum overdrive knob
8-bit crusher modulation knob
Arpeggio increase knob
On/off toggle switches:
Loose wire lo-fi
Snare cut
Bass drum cut
Bass enhancer
Feedback
Break down hold
White noise invader
Internal speaker has been removed to house modifications
Original features:
On/off
6 voices (organ,horn,oboe,strings,piano and harpsichord)
Effects: sustain and vibrato switches
Off beat l.e.d indicator
6 drum rhythms (waltz,tango,swing,slow rock,disco and latin)
Rhythm tempo adjust
Arpeggio/rhythm balance adjust
Master volume control
Arpeggio volume control
3 postition rhythm switch (off, synchro and start)
3 key modes (standard, bass&chords and single finger chords)
Pitch trimmer at bottom
Polyphonic 5/9 notes, depending on mode in use
1/4" aux line output
1/4" headphone out
12v dc in
Or
Powered by 8 'c' batteries (not included)
Comes with original box (ok condition) and original mains adaptor
Detachable key cover lid"

RC CIRCUIT BENT 1983 BONTEMPI MINSTREL ANALOGUE SYNTH

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Arp Rhodes Chroma Analog Synthesizer w Midi CC+

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Serial # 21030348
For more info on the CC+ upgrade and the Chroma in general, visit the excellent Rhodes Chroma site.

Analog Synthesizer Modular Mixer With Filter

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"Mix Mix Mix.
One little mischevious devil here.
...and a funky mix.
Mix Machine is a VOLTAGE-CONTROLLED 8-channel mixer.
It is also an 8-channel FILTER BANK.
It is made using 8 CEM3379 chips by Curtis Electro-Music!
Audio inputs = 8 of them!
Voltage-Controlled PAN = 8 of them!
Voltage-Controlled AMP = 8 of them!
Voltage-Controlled LOW PASS FILTER = 8 of them!
Voltage-Controlled Resonance = 8 of them!
Audio Outputs = Stereo or L = mono. This can be handy.
and a Master Volume knob. "Main Gain"
There are 32 Control Knobs!
They are labelled as Attenuations, but are in fact, Control Knobs.
There are also 16 extra unused jacks on the back.
They were not used in this design, but you could use them for your own mods if you like.
The Filters are 4-pole 24dB and can self-oscillate.
There are just so many possibilities here.
Turn up the Volume!
Turn up the Resonance knobs!
Hear the tones drone!
Filter your guitar!
or Drum Machine?
or Akai MPC sampler with multiple outputs! Filter it 8 ways, please.
Plug LFOs, Analog Sequencer, or Sample+Hold into Control Input Jacks.
Use with a MIDI-CV Converter for Programmed PANS and FILTER SWEEPS.
It has an internal power supply and comes with a cable for USA 117volts AC."
More info and samples here.

Roland Vocoder SVC-350

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