[nreel]

Don't know of any Software Controlled Effects, other than with your Sound Card, but you are not hooking your Microphones to your Sound Card...I hope.

So here are some hardware suggestions:

If you use a Powered Mixer, you can either replace the Powered Mixer with one that has BUILT-IN Effects or obtain an EFFECTS PROCESSOR (about $100 - $300) and connect it to your Mixers Effects OUT and Effects RETURN, assuming you have an Effects OUT and Effects RETURN on your Powered Mixer.

If you are using a separate Mixer with a separate AMP, you can either replace the Mixer with one that has BUILT-IN Effects or obtain an EFFECTS PROCESSOR and hook it up as stated in the above paragraph.

Be aware that, unless your Mixer has an Effects STEREO OUT, even though most Effects Processors have Stereo IN/OUT's, you will not be able to utilize Stereo.

I use a Yamaha Emx5000 Powered Mixer (about $750.00), for small shows. It has TWO Effects Channels Built-In with TWO 500W Amplifiers/Channel@ 4ohms, Stereo.

Plenty of Power and I do not have to keep switching between Effects to accommodate a Song Genre or Singing Style. One Effects Channel is set on Echo and the other Effects Channel is set on Reverb.

To smooth most Singer's voices I use Both Effects, at the same time.

It is hard to know how to advise because there are many unknowns, other than monetary, concerning your application.

Hope this provides a ray of hope,

Norm