MATRIXSYNTH: Blue TZ VCO Source Confirmed?

Monday, July 16, 2012

Blue TZ VCO Source Confirmed?

Update: Bluelantern has worked things out with Ian Fritz and is no longer banned on the site. This is no longer an issue, however this post will remain for synth history.

Original post:

For the time being Bluelantern's items will no longer be featured on this site. This is a follow-up to the BLUE ZTVCO DRY DEMO & Surrounding Controversy post.

via Ian Fritz on Muffs:

"Here is an illustration of the Blue Lantern Blue VCO, with inked-in sections indicating the correspondence of this circuit to the Teezer Thru-Zero VCO. For the VCO core and sync sections, the two circuits are virtually identical. The only notable difference is the trivial substitution of an LM13700 OTA, along with substitution of low-performance op amps. Otherwise, circuit topology and component values are exactly identical, even down to and including the number and values of all bypass capacitors.

As discussed before, the +/- 5V supplies were taken from Rene's TZ VCO. They consist of three-terminal power supply regulators, rather than the precision reference components of the Teezer. Otherwise, the multiple power supply voltages are derived exactly as in the Teezer. The waveshapers -- external to the core -- are a different design.

Hope this helps clarify matters regarding the Blue Lantern "design". I hate to be still beating on this, but we are still hearing negative comments from the skeptics.


via Adam Vavrick on The MATRIXSYNTH Lounge

Bluelantern is banned on Muffs. I will see if he has any response to this.
For the time being Bluelantern's items will no longer be featured on this site.


  1. Take it up in court, instead of trying sabotage some else's business, even getting them banned from sites, by whining like a bitch in online forums, would be the proper way to do it.

  2. Thank you for not supporting those that choose to exploit the community and profit from the hard work of others with no credit or royalties paid, Matrix.



© Matrixsynth - All posts are presented here for informative, historical and educative purposes as applicable within fair use.
MATRIXSYNTH is supported by affiliate links that use cookies to track clickthroughs and sales. See the privacy policy for details.