Hi all, Im currently doing my final year project based on an Audio frequency pitch detector. I'm using the Analog- to- digital technique to extract the fundamental frequency of any sound that the device detects. However, I would like o know how using DSP chip is better to detect pit in comparison to ADC? Is there any downsides for using DSP chip instead? Thanks in advance _____________________________________ Do you know a company who employs DSP engineers? Is it already listed at http://dsprelated.com/employers.php ?
Audio Frequency Pitch detector
Started by ●April 16, 2007
Reply by ●April 16, 20072007-04-16
vanya wrote:> Hi all, > Im currently doing my final year project based on an Audio frequency pitch > detector. I'm using the Analog- to- digital technique to extract the > fundamental frequency of any sound that the device detects. However, I > would like o know how using DSP chip is better to detect pit in comparison > to ADC? Is there any downsides for using DSP chip instead?What are you talking about? An A-to-D converter works on the whole signal, not on a particular harmonic of your choosing. A DSP chip can't directly deal with analog signals; there needs to be an A-to-D converter to get the signal it will work on. So you need both, and also some understanding of the tools and devices involved. Jerry -- Engineering is the art of making what you want from things you can get. ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯
Reply by ●April 16, 20072007-04-16
>vanya wrote: >> Hi all, >> Im currently doing my final year project based on an Audio frequencypitch>> detector. I'm using the Analog- to- digital technique to extract the >> fundamental frequency of any sound that the device detects. However, I >> would like o know how using DSP chip is better to detect pit incomparison>> to ADC? Is there any downsides for using DSP chip instead? > >What are you talking about? An A-to-D converter works on the whole >signal, not on a particular harmonic of your choosing. A DSP chip can't >directly deal with analog signals; there needs to be an A-to-D converter>to get the signal it will work on. So you need both, and also some >understanding of the tools and devices involved. > >Jerry >-- >Engineering is the art of making what you want from things you can get. >¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯ >Actually, by that I men, designing a complete Analogue Pitch detector instead of a digital one _____________________________________ Do you know a company who employs DSP engineers? Is it already listed at http://dsprelated.com/employers.php ?
Reply by ●April 16, 20072007-04-16
vanya wrote:>> vanya wrote: >>> Hi all, >>> Im currently doing my final year project based on an Audio frequency > pitch >>> detector. I'm using the Analog- to- digital technique to extract the >>> fundamental frequency of any sound that the device detects. However, I >>> would like o know how using DSP chip is better to detect pit in > comparison >>> to ADC? Is there any downsides for using DSP chip instead? >> What are you talking about? An A-to-D converter works on the whole >> signal, not on a particular harmonic of your choosing. A DSP chip can't >> directly deal with analog signals; there needs to be an A-to-D converter > >> to get the signal it will work on. So you need both, and also some >> understanding of the tools and devices involved....> Actually, by that I men, designing a complete Analogue Pitch detector > instead of a digital oneIt will be hard to design an analog filter bank that's selective enough. Semitones are six percent apart and a pitch detector needs to be much more selective than that. You might try a phase-locked loop with a digital frequency meter (a couple of counters and a crystal oscillator) reading the local oscillator. Jerry -- Engineering is the art of making what you want from things you can get. ¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯¯