How i can get the information about sound frequency or amplitudo when i spoke to the microphone with my sound card. Can i get my voice frequencqy using Delphi 6.0 ????? And how to compare my voice intonation with my friend voice intonation ????? i want to check when i said hello, is same when my friend said hello too, is my intonation is same with his intonation ???? Please help me ......