I like the duplicator effect built into my FP90 and was thinking of trying one of these with my Arranger. Anyone have any experience with it? Its TC Helicon so I know its a good quality.
Thanks for any info.

I love using a doubling effect just before I hit the harmony button to emulate the four freshmen approach. Like the way they do "Blue World"
The words "It's A" are doubled, the "Blue World ... without you" is full harmony.

Would you consider it good enough on its own if you didn't have a Harmonizer in your keyboard ?

No Bill. A simple chorusing effect doesn't do it for me. Instead, I'd opt for the Harmony Singer - much more useful.
https://www.sweetwater.com/store/detail/HarmonySing2--tc-helicon-harmony-singer-2

Thanks Dave. I actually have the Harmony M but just looking for something very simple on/off and easy setup. Do you know how the Harmony Singer determines the correct Harmony without a Midi input ?

Background vocals are added by analyzing your incoming guitar signal and using your own voice to create professional-sounding harmonies.

Looks like there is an instrument input jack on the side of the unit ...

Yes, there is a 1/4" pass-thru jack that goes from your kb thru the SINGER then out to your amp. If you're not using an amp, it will still read the chords you play.

What could be easier than a single unit? Seems you already have a great device ... unless you're referring to plugging in AC AND midi , AND a mic - yeah, that's a chore. C;mon - buck up - it sounds great!

I know, its the being stuck around here so much and "What can I buy now" syndrome. Just lazy on my part but it is a few cables more to hook up. Thats the one thing I really wish the BK9 had, since it designed for the preforming entertainer, a vocal harmonizer.
thanks for the input.

thanks Tony Didn't look at it closly enough. OF COURSE its for guitar players. There goes my nice stereo sound from my keyboard so its out. Time to pull out the Harmony M again.