In 1979, the Roland Dimension-D SDD-320 Analog Stereo Chorus came out and it was the 'big new thing' and instantly popular with guitar players because it made into stereo the mono guitar sound. It did this in a beautiful and subtle way. Artists Brian Eno, Talking Heads, Kate Bush, U2 and others, popularized the "Dem-D". It used a pair of bucket-brigade analog delay lines (for left and right channels) and had just four mode push buttons including bypass or 0 mode.

Arturia's Chorus DIMENSION-D has Roland's original four mode push buttons but made button 0 route the audio through the original unit's compressor/expander emulation for coloration but without chorusing. It does tighten the low frequency on my first listening tests---and that can be very useful here in my mixing work.

In 1974 the Musitronics' Mu-tron Bi-Phase pedal came out and Arturia has the Phaser BI-TRON plug-in emulation. Both use two independently controlled, six-stage phase shifters with many ways to connect them together, control each separately, modulate, and mix the effect. There are two LFOs with three shapes and adjustable rate, an envelope follower, and feedback. Arturia added a treadle--a foot pedal for manually changing the phasing effect. Of course all controls can be automated and the treadle works great for automating!

Arturia's Flanger BL-20 plug-in is based on the Bel BF-20 Stereo Flanger rack-mount unit that came out in the late 1970s. I especially liked it for very subtle changes but if you want an "inside-out" moment, it does that easily and in full stereo width if you want.

Each of these new Arturia Modulation Effects are $99 each or $199 for a bundle of all three. The existing FX Collection bundle with 3 Filters, 3 Preamps, 3 Compressors, 3 Delays, and 3 Reverbs is $399.