OUT OF STOCK
MICROCOMPRESSOR EURORACK - compact VC compressor for modular synths.
This is compact but hi-quality compressor. I used THAT4301 dynamics processor.
THAT 4301 Dynamics Processor, dubbed "THAT Analog Engine®", combines in a single IC all the active circuitry needed to construct a wide range of dynamics processors. The 4301 includes a high-performance, exponentially-controlled Blackmer® VCA, a log-responding RMS-level sensor and three general-purpose opamps.
Design is based on THAT Corp. design notes - Fully Adjustable Compressor / Limiter. This is a feedforward VCA compressor.
Features:
Adjustable by potentiometers Treshold, Ratio, Attack, Release, Makeup gain.
Reduction LED which lights when signal level exceeds treshold.
Treshold, Makeup, Attack and Release can be controlled by CV. -+5V covers all pots range.
Hard/soft knee switch.
Two timing modes are available -- auto and manual. In auto mode attack and release rates are linked, and depend on the non-linear capacitor circuit. In manual mode, variable, independent adjustment of the attack and release dynamics are possible.
RMS, Peak or Automatic timing detector options.
Two CV outs. CV1 after RMS-level sensor and Treshold control works something like envelope follower. CV2 after all controls beforeVCA, using this out any VCA can be patched as compressor or modulating a filter gives interesting effect.
Sidechain send and receive to external sidechain processing.
Two Microcompressors can be linked in stereo pair by Stereo 1 and Stereo 2 jacks. Master/slave switch off controls on slave unit. Stereo 1 to link the two RMS detectors. Such coupling results in true power summing and a more euphonic behavior. Note that, when linking detectors in this manner, means to adjust for the +/-3 dB tolerance on each detectors' 0 dB reference level must be provided. Stereo 2 to send CV from master unit to slaves VCA.
PCB - 2mm thickness, gold platted, black mask. $30
Two panels - 16HP front & back. Anodized alu, black print. $35
SMD parts + soldering. $15
Shipping per set: $5 - only board, $8 - board+panels.
TOTAL for complete set witch shipping: $88
Paypal info(at)greenexpo.by
Assembled module $330 + $15 shipping.
MUFFWIGGLER forum thread http://www.muffwiggler.com/forum/viewtopic.php?t=82527
Soundsample. Tube VCA works as compressor modulated from CV2 out of Microcompressor. Filter - Mutant vactrol VCF. No effects.
Documents:
Partslist.
Front panel.
PCB:
PCB with soldered SMDs:
Inside:
Microcompressor at work:
 |
 |
| Not compressed | Compressed |
OLD VERSION PCB (still in stock)
(c) 2012 L-1 Synhesizer. E-mail: info@greenexpo.by