Hey you all guys. I'm ending (finally) my engineering course. I'm graduating in telecomunications and electronics by PUC-RJ (Pontifícia Universidade Católica do Rio de Janeiro). In order to get graduated, I must make a project related to everything I learned last 5 years, and I have one year to make this project. Since I'm grauating on electronics and telecomunications, my final project must have signal processing, transmission and analogue/digital circuits involved.
I like audio a lot, I play guitar / electric guitar, I have a simple band etc. So, I'm thinking of doing something related to audio.
Since I myself like to "create" new things, I have a project in my head that I'd appreciate you to make your comments regarding on its complexity and, of course, insanity...
Here it goes:
I want to desing a system to process audio on a PC and amplify it to a loudspeaker. The signal flow will be:
1) signal at line in (1,4Vp) is sampled at a very high frequency (about 500 kHz) using a high resolution 24 bit ADC (like AD7714).
2) the digital signal is transmitted via USB connection to a PC.
3) the computer processes the signal using a software created by myself and sends it back to the digital circuit.
4) the digital circuit uses a DAC of 24bit resolution and about 500kHz to convert it to analogue signal again.
5) the signal is sent to a power amplifier of about 30W rms so we can hear it in a loudspeaker.
Now you may be astonished asking yourselves why such a high sample rate (500kHz) and why such a high resolution (24 bit), since the highest-end hi-fi audio systems use 24bit / 192 kHz. The reason is beacause I want it this way just to create new things and hear what happens.
Well, all I want here is the help and comments and hints of much more experienced engineers than me. I want hints like: what parts to use, how shuld i make my digital (hardware implemented or microcontrolled or microprocessed), the best way to communicate to usb ports, usb driver c++ programming on windows xp, etc etc etc...
I like audio a lot, I play guitar / electric guitar, I have a simple band etc. So, I'm thinking of doing something related to audio.
Since I myself like to "create" new things, I have a project in my head that I'd appreciate you to make your comments regarding on its complexity and, of course, insanity...
Here it goes:
I want to desing a system to process audio on a PC and amplify it to a loudspeaker. The signal flow will be:
1) signal at line in (1,4Vp) is sampled at a very high frequency (about 500 kHz) using a high resolution 24 bit ADC (like AD7714).
2) the digital signal is transmitted via USB connection to a PC.
3) the computer processes the signal using a software created by myself and sends it back to the digital circuit.
4) the digital circuit uses a DAC of 24bit resolution and about 500kHz to convert it to analogue signal again.
5) the signal is sent to a power amplifier of about 30W rms so we can hear it in a loudspeaker.
Now you may be astonished asking yourselves why such a high sample rate (500kHz) and why such a high resolution (24 bit), since the highest-end hi-fi audio systems use 24bit / 192 kHz. The reason is beacause I want it this way just to create new things and hear what happens.
Well, all I want here is the help and comments and hints of much more experienced engineers than me. I want hints like: what parts to use, how shuld i make my digital (hardware implemented or microcontrolled or microprocessed), the best way to communicate to usb ports, usb driver c++ programming on windows xp, etc etc etc...