Last summer, two Milwaukee music giants - John Sieger and Greg Koch - unveiled their CD collaboration, "Plays Well With Others," showing how two strong voices could reach a perfect pitch by working in unison. Back then, Sieger - who also remains active with his band Semi-Twang - made it clear that he and Koch had completed many more songs than could be collected on "Plays Well With Others." Now, another stack of them arrives in the form of Sieger's "A Walk In The Park," which comes out on April 1.