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How does a voice changer circuit work?
Ok, so i am at University and my projects is to design a voice effects circuit. I am looking for a pitch change and vibration distortion options. I understand resistors and capacitors are needed to minimise the current to the circuit, however i am unsure why each of the components are there. And why they are connected the way they are. I am just looking for a description on WHY the components are chosen for effects devices and what they do individually for the circuit.
Thanks
3 Answers
- 7 years agoFavorite Answer
Charcinders is correct, based on reading your question i'd say you are fairly new to electronics/engineering feild. So designing from scratch would be quite the endevour. Off the top of my head the easiest route would be a DSP approach writing the code, controlling some ADC,DAC's and such but if you havent done or at least taken classes on DSP then you SOL. It sounds like your doing an end of year project in a 101 electronics class and you just want to do a cool project. I've used an HT8950 ic that does voice modulation and effects and its cheap and easy to use. If you follow the base design in the datasheet then you should be well on your way. I'd use a LM386 as the output to your speaker for an extra "boost". Here is a link of somebody that used the HT8950 for a "robotic" voice effect. http://www.instructables.com/id/Robot-Voice-Modula...
Anyways hoped that helped you!
Source(s): Masters in E.E - charcindersLv 77 years ago
Your knowledge of electronics needs to advance far beyond resistors and capacitors to understand what will be quite a complex circuit, let alone design one.
At a minimum, you will need to know basic electronic theory including what resistors and capacitors do (minimising the current to a circuit is not it), diodes and transistors, Ohm's law, voltage dividers, potentiometers, filters, op-amps, microphones, power supplies, amplitude and frequency modulation (theory and methods of achieving them) and some theory about sound - harmonics, effects of different types of distortion, etc. If you want to use digital methods you might also need to know about sampling, analog to digital and digital to analog conversion, digital signal processing, digital electronics, microcontroller programming, etc.
Pitch change is a particularly difficult thing to do and will almost certainly require some digital processing.
I'm surprised you have been given this as a project if your knowledge of electronics is at such an early stage. I'd expect this to be something like a 3rd year project for an electronics engineering student.
