The Quartz Optical Compressor is based on the Diamond CPR-1 Compressor and BCP-1 Bass Compressor, two vintage-inspired optical compressor pedals that share the same overall schematic.

The original Diamond Compressor was released in 2005. Like other optical compressors, it used an optocoupler for dynamic gain reduction. But the tone control was something never seen before in a pedal: an adaptation of the “Tilt” control from the Quad Model 34 hi-fi preamps of the 1980s, which is similar in usage to the bass/treble pivot of the Big Muff tone control, but refined so that it has a truly flat frequency response in the middle.

The Quartz is an adaptation of the original Diamond circuits that allows either the standard or bass version to be built. Our version also adds a third position to the frequency selector, which is a feature in the 2023 compact pedals but not the originals.

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Review by Talk Bass.com

Manual

Quartz Optical Compressor 

Das Vector Ambient Delay ist ein einfaches Delay-Projekt, das auf dem Mad Professor Deep Blue Delay basiert und mit einigen Modifikationen und Verbesserungen versehen wurde.

Die Schaltung basiert auf dem PT2399 Delay-Chip. Obwohl der PT2399 technisch gesehen digital ist, hat er nicht die sterilen Klangeigenschaften, die man mit modernen digitalen Delays assoziiert, sondern ist stattdessen viel wärmer und analoger, mit ähnlichen Eigenschaften wie ein Bandverzögerungsgerät. Es eignet sich gleichermaßen für kurze Slapback-Effekte oder längere rhythmische Wiederholungen.

Die endgültige Entscheidung liegt bei Ihnen, aber selbst die meisten Analog-Puristen sind voll des Lobes über diese Schaltung. Da die Gesamtkomplexität viel geringer ist und die Bauteile weitaus billiger sind als bei einem BBD-basierten Delay, sind Sie es sich selbst schuldig, diese Schaltung auszuprobieren, bevor Sie sich für ein echtes analoges Delay entscheiden!

The Vector Ambient Delay is an easy delay project based on the Mad Professor Deep Blue Delay with a few modifications and improvements added.

The circuit is based around the PT2399 delay chip. While the PT2399 is technically digital, it doesn’t have the sterile sound characteristics associated with modern digital delays, but is instead much warmer and analog-voiced, with similar characteristics to a tape delay unit. It’s equally suited for short slapback effects or longer rhythmic repeats.

Your ears can be the final judge, but even most analog purists give high praise to this circuit. With the overall complexity being much lower and the cost of parts being far cheaper than a BBD-based delay, you owe it to yourself to try this one before jumping straight into a true analog delay!

Demo by SLÄRP

Official Product Video

Vector Ambient Delay

The Azure Analog Chorus is based on the BOSS® CE-2, first released in 1979 and generally considered to be one of the best chorus pedals ever made. With only two knobs, it’s simple to operate, but it doesn’t take long to understand the wide range of sounds contained inside.

Demo by Ryan Sponagle

Demo by Steven Seeley

Review by reddit /diypedals

Azure Analog Chorus

The Lumin project is a workalike of the BBE® Sonic Stomp / Sonic Maximizer. It’s based on work done by Bajaman (documented on FSB)[1] and Sebastian Montti (stm) on DIYStompboxes in recreating the functionality of BBE’s proprietary NJM2150AD chip.[2]
The BBE 482i Sonic Maximizer rack unit first appeared on the scene in the late 1980s and quickly achieved legendary status among sound engineers for the way it imparted clarity on the signal—often described as sounding like a blanket was lifted off the speaker cabinet. The circuit is said to create “frequency-dependent time alignment” so that the audio frequencies hit the speaker in a more optimal way. Many professional audio setups even outside the music industry utilize the “BBE process” to enhance sound quality.

Demo by R.J. Ronquillo

Demo by James Pier

Lumin

A part-for-part replica of a mythical overdrive effect noted for its high-end tone and price. The Klon Centaur and its successor, the KTR, remain highly original designs in an industry full of clones and tweaks to existing circuits.

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