July is speeding by at such a rate that we're now about to begin the final week of the four-week Summer Festival at Lakeside, presented by the Seattle Chamber Music Society. Thus far, the festival has produced consistent excitement, at least partly through a parade of outstanding new artists making their festival debuts.

It's not every day, however, that you have a professor and a student debuting in the same festival.

Artistic director Toby Saks was judging a competition when she first heard Wonny Song play the piano, and she was so impressed by what she heard that she invited him to make his Seattle debut here. He'll open the Seattle Chamber Music Society's first expansion into the Overlake School of Redmond on Aug. 3 with a pre-concert recital, followed by other performances in the chamber concerts at Overlake (through Aug. 12).

Meanwhile, in the Lakeside festival, pianist Jeremy Denk realized he was double-booked for the final week, and Saks needed a replacement for him in the two concerts for which he was scheduled. She sought out Song's teacher since 1995, University of Minnesota professor Lydia Artymiw (pronounced Arty-myoo), who has already played most of the country's major summer music festivals — but not this one.

Artymiw was heard just once before in Seattle, in a Seattle Symphony "Stars of the Future" concerto program in 1980. An award-winning teacher, she has shepherded 26 piano doctoral students through their studies and is particularly proud of Song's progress (he recently won the Young Concert Artists International auditions in New York).

"I was delighted to be asked to come to Seattle," Artymiw said shortly before flying to New York for an Albany recital and then appearances at the Maverick Festival in Woodstock.

"I love the Dohnányi Violin Sonata, which I learned in the last week, and Tasmin Little is a marvelous violinist. And I've played the Schumann Piano Quintet many times."

The Dohnányi is part of Wednesday's program; the Schumann Quintet will be heard next Friday.

Teacher and student won't appear on the same programs; Artymiw's performances will be over by the time Song plays. But they have performed together in the past, just as Artymiw performed together with her own mentor, Gary Graffman.

"Teaching has made me a deeper artist," says Artymiw, "and it has been such a pleasure to see Wonny's talent blossoming."

The Summer Festival at Lakeside, in which Artymiw will appear, continues tonight, and next Monday, Wednesday and Friday. The new Summer Festival at the Overlake School, in which Song is featured, presents five concerts of new artists and repertoire Aug. 3-12. The Seattle Chamber Music Society's Web site, www.scmf.org, has ticket information and driving directions; the ticket phone is 206-283-8808.

Great singing

A Sunday concert will combine singers from the distinguished British choral group the Tallis Scholars with Seattle's Tudor Choir (the conductors are Peter Phillips and Doug Fullington, respectively). The 8 p.m. program in St. James Cathedral includes works of Tallis, Taverner, Sheppard and Byrd. Suggested donation is $20, at www.tudorchoir.org.

The Tallis Scholars, in town as part of a summer school for choral singers, will be joined by students next Friday for a gala concert at St. James, with repertoire extending from Lassus and Clemens to Parsons. Suggested donation for this event is $12, also at www.tudorchoir.org.

Melinda Bargreen: mbargreen@seattletimes.com