Reviews of two new releases   SASHA AND JOHN DIGWEED Communicate Kinetic Records Get down, get down: URB, Groove, XLR8R     That's the thing about techno music--it's all or nuthin'. It must beckon to the dance floor and make even the most somber hear the call of Dr. Dance. One would expect nothing less from these two veterans of the British-cum-international dance scene (in '98 Digweed placed seventh in DJ Magazine's list of the 100 best DJs worldwide; he's the featured spinner in the recent movie Groove). For the most part you will not be disappointed. Occasionally the disc's ambient wanders last a little long for the non-tripper, but relief floods back as soon as heavy beats thud again. The precarious cool of trancey conglomerations slips easily into cheesiness and electronic fluff, and Communicate teeters dangerously on the edge once or twice. Digweed and Sasha's amazing mixing skills pull things back together with redemption songs like Mainline's "Narcotic." Eerie, chimelike sounds ride atop distant beats until, suddenly, they have you surrounded. And if this song, which appears early on, seems like a small climax, don't worry. They're just teasing you. These three hours of foreplay build to a real explosion. Alley Hector   PORTLAND YOUTH PHILHARMONIC The Territory Beyond PYP Association     Surprising but true: Portland claims the nation's oldest youth orchestra. What's more impressive is that the Portland Youth Philharmonic continues to be a vital source of creative spirit for the region. Current music director Huw Edwards, only the PYP's fourth in its 76 years, has been rousing his army of 200 7- to 22-year-olds for five years now. This disc shows off the youthful fire he's harnessed in with a trio of works recorded live over the past season. Englishman George Butterworth's A Shropshire Lad is a fitting hymn-to-lost-youth opener. The rhapsodic setting, inspired by the poems of A.E. Housman, is an ironic elegy for its composer, who died in the Battle of the Somme in 1916 at the age of 31. It's a sober work free of flashy virtuosity, though both violinist Megumi Stohs and violist Joni Allan stand out amidst the subtle unison and tonal coloring. The West Coast premiere of John Mackey's Do not go gentle into that good night is a carpe diem call of another sort. It begins with a mournful clarinet intro by David Heikkinen, building with ominous string strains and the tension of slow, marching percussion and swelling brass. Five minutes in, the tension bursts, as bows rake strings with Psycho-like violence and drums thunder down. A reprise of the solemn intro, this time from Galen Cohen's cello, sneaks in before a roaring finish. As the closing hammer drops, the audience responds with a momentary gasp of silence. It's an exciting workout and an excellent showcase for Edwards and his young rabble-rousers. Dmitri Shostakovich's powerful Symphony No. 10 is played with impressive maturity, delicately assured in the opening Moderato, a ferocious swarm in the Scherzo: Allegro. This is not child's play, but confident, solid playing. But then again, Edwards doesn't treat his charges like children. He imagines them to be the professionals of tomorrow. This disc proves he's not off track. Bill Smith