Spectrogram version 5.0 is a freeware dual channel audio spectrum analyzer for Windows 95/98/NT which can provide either a scrolling time-frequency display or a spectrum analyzer scope display in real time for any sound source connected to your sound card. (License: Free)

1. Analysis and identification of biological sounds
2. Analysis and identification of human speech
3. Analysis of musical performances
4. Tuning of musical instruments
5. Evaluation and calibration of home audio systems
6. Ham Radio audio reception and tuning
7. Analysis of radio interference including atmospheric electromagnetic effects