Pitch perfect: NM 430
The name NM 430 may sound cryptic, but early-music insiders will know it isn’t some radioactive substance under investigation at Los Alamos. (Is it?) No, it refers to pitch level. Modern musicians tune their instruments at the pitch of A=440, more or less, meaning the note A makes a complete oscillation 440 times per second. General consensus is that normal pitch in the pre-standardized era of the late-18th century was more likely to be at about A=430, roughly a quarter-tone lower than it is today. NM 430 is, ergo, a quartet of New Mexico (NM) instrumentalists who play on period instruments tuned to A=430 and turn their talents to music of the Classical period. The four members (pictured, from left to right) — violinist Steven Redfield, oboist MaryAnn Shore, violist Gail Robertson, and cellist Katie Rietman — will play in various combinations in a program that includes a string trio by Franz Joseph Haydn as well as pieces by three far lesser known contemporaries of his: Georg Druschetzky, Carl Friedrich Baumgarten, and Friedrich Dotzauer. This entry in the weekly TGIF series at First Presbyterian Church (208 Grant Ave.) begins at 5:30 p.m. on Friday, Feb. 24. No tickets are necessary for this free concert, although contributions are welcome at the door. For more information, call 505-982-8544, Ext. 16. — J.M.K.