From Parallel Waves or Eight Chain Thru.

1. Arm Turn 1/2;
2. Centers Cast Off 3/4 as Ends U-Turn Back;
3. Outside 4 Circulate as Very Centers Trade;
4. each Diamond Counter Rotate 1/2;
5. Flip The Diamond.

Ends in (opposite-handed) Parallel Waves. Alter & Circulate is a 5-part call.

Notes:

• The Diamond Counter Rotate 1/2 is also referred to as Star 1/2. The caller can modify the amount to turn the Diamond (usually 1/4 or 3/4). If you are a Center, be sure to retain handholds throughout the Diamond Counter Rotate. If you are an End, don't stick your hand into the "star," or you may cause confusion as to who should Flip into the Center.
• Wait until there are four dancers in your Diamond before you start the Counter Rotate.
• Alter & Circulate is the same as Alter The Wave [C1] Interrupt after part 2 with the Ends Circulate as the Very Centers Trade.

before Alter & Circulate   after Arm Turn 1/2   after Centers Cast Off 3/4 as Ends U-Turn Back       after Very Centers Trade as Outside 4 Circulate   after Diamond Counter Rotate 1/2   after Flip The Diamond (done)

Variations: Star 1/4 or Star 3/4 (ends in a Tidal Wave); Don't turn the Star. Alternatively, the caller could say Alter & Circulate But Counter Rotate The Diamond 1/4 (or 3/4).

Spin Back [C4] (Norm Wilcox 1972): From Facing Couples or a Wave. Arm Turn 1/2; Centers Cast Off 3/4 as Ends U-Turn Back. Ends in a Diamond. This is the first 2/5 of Alter & Circulate.

{i - j - k} Alter & Circulate [C4]: From Parallel Waves or Eight Chain Thru: Alter & Circulate replace the Arm Turn 1/2 with an Arm Turn i/4; replace the Centers Cast Off 3/4 with a Cast Off j/4; and replace the Diamond Counter Rotate 1/2 with a Diamond Counter Rotate k/4. Ends in Parallel Waves or a Tidal Wave.

See also Alter The Wave [C1].