This standard has been reviewed* and then confirmed in 2011.
Specifies the frequency for the note A in the treble stave and shall be 440 Hz. Tuning and retuning shall be effected by instruments producing it within an accuracy of 0,5 Hz.
Edition: 1 (Monolingual) ICS: 17.140.01 Status: Published Stage: 90.93 (2011-12-22) TC/SC: ISO/TC 43 Number of Pages: 1
No revision information available
No corrigenda or amendments available