Piano Number Age Lookup 2 – New York Piano Tuner : I used ear tuning (also known as auditory tuning) and state-of-the-art software-based electronic tuning equipment for sound tuning. (The frequency for home concert tuning is 440 Hz.) 我采用耳调音法（也称听调音法）和最先进的基于软件的电子调音设备进行调音。（家用音乐会调音的频率为 440 Hz） Chen YN 调音主页

Piano Number Age Lookup：钢琴编号年代快速查询（2） Bosendorfer 贝森朵夫钢琴序列号1828 – 1830 : 4 ————2001831 – 1840 : 201 ———4901841 – 1850 : 491 ———30001851 – 1860 : 3001 ——–50001861 – 1870 : 5001 ——–64001871 – 1880 : 6401 ——–93001881 – 1890 : 9301 ——–122001891 – 1900 : 12201 ——-156401901 – 1910 : 15641 ——-196401911 – 1920 : … Continue reading Piano Number Age Lookup 2