Exhibit 99.1 JOINT FILING AGREEMENT In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, the persons named below agree to the joint filing on behalf of each of them of a statement on Schedule 13D (including amendments thereto) with respect to the Common Stock of Steinway Musical Instruments, Inc. and further agree that this Joint Filing Agreement be included as an Exhibit to such joint filings. In evidence thereof, the undersigned, being duly authorized, have executed this Joint Filing Agreement this 24th day of June, 2011. Samick Musical Instruments Co., Ltd. By: /s/ Jong Sup Kim --------------------- Name: Jong Sup Kim Title: Chairman Opus Five Investment 1, LP By: /s/ Kyung Min Park ----------/----------- Name: Kyung Min Park Title: Sole Member of General Partner Opus Five Investment, LLC By: /s/ Kyung Min Park --------------------- Name: Kyung Min Park Title: Sole Member Sam Song Caster Co., Ltd. By: /s/ Kang Log Lee --------------------- Name: Kang Log Lee Title: Director Jong Sup Kim By: /s/ Jong Sup Kim --------------------- Name: Jong Sup Kim