AVT2619 / 1 A

The system, according to the name, is used to change the pitch - it moves up or down the acoustic band signals. Changing the frequency by 40 ... 50 Hz means that you can not recognize the person by voice. A slightly larger change means that the man will speak with the voice of a woman and the woman will be a man with a voice (lowering the frequency). Moving a few hundred hertz gives cosmic effects.
The finished layout has excellent parameters. The operating frequency range is much broader than the spectral range of human speech. The quality of the processed sound remains outstanding. The module may be of interest to amateur radio operators using the SSB technique. We also recommend it to people involved in publicizing objects - the module can be used as an anti-wake system, reducing the susceptibility of the audio track to the column and microphone coupling.

The device is especially recommended for entertainment and other not-so-important goals, to amateur radio players and acoustics

Selected parameters:

• 50 -15000 Hz band
• smooth regulation of frequency change
• amplitude of the input signal 2 Vpp - maximum, 1Vpp - optimally
• module strengthening approx. 1
• the possibility of adding a 50 Hz filter
• power supply - 11-18 Vdc
• printed circuit board and documentation included
  
  Detailed description in EdW 2-3 / 02