Board for a 5 way Crossover

Started by mill...@gmail.com in Audio Signal Processing7 years ago 3 replies

I wasn't really sure where to post it but my situation is that I need an inexpensive (hobbyist) DSP solution to turn a single input into a 5-way...

I wasn't really sure where to post it but my situation is that I need an inexpensive (hobbyist) DSP solution to turn a single input into a 5-way crossover (distributing the signal across a sub, 2 mids, and 2 tweets) output. I've considered doing an active crossover out of pure components, but a DSP solution can give me flexibility (such as adjustable crossover) that would be ideal. So far I hav...


Building a guitar tuner with the $55 DSP kit from TI

Started by johnfatcock in Audio Signal Processing7 years ago

Hi everybody, I just joined the forum. I'm an engineer out of Georgia Tech and have been working mostly in RF and radar for the past 15 years....

Hi everybody, I just joined the forum. I'm an engineer out of Georgia Tech and have been working mostly in RF and radar for the past 15 years. I just bought one of those $55 DSP boards from TI just for fun. I'm also a guitar player in my spare time, so I figured a good project to get my feet wet would be a guitar tuner. To constrain the discussion somewhat let's say my guitar tuner's "job" w...


Some unclear things about frequency demodulation

Started by petr...@yahoo.com in Audio Signal Processing7 years ago

Hello. To introduce myself, I'm a blind music composer, I play the piano and the flute, and I'm also very interested in lots of topics concerning...

Hello. To introduce myself, I'm a blind music composer, I play the piano and the flute, and I'm also very interested in lots of topics concerning acoustics and digitized sound. Unfortunately, the last time I had any regular math lessons was when I was about 16 and since then I had to look things up very non-systematically on the web. But I hope I'm finally beginning to understand some of the math...


Bandpass filters for color organ

Started by Ord Millar in Audio Signal Processing7 years ago 5 replies

Hello all, I am working on a project that plays MP3 or WAV files, and part of it involved having LED's that vary in intensity according to the...

Hello all, I am working on a project that plays MP3 or WAV files, and part of it involved having LED's that vary in intensity according to the audio level in 4 bands. The bands are to be adjustable by the user during operation. There is no need for great precision, but I will need to keep the bands relatively constant even if a file at a different sample rate is played. I have read ...


Odd Wave Sections

Started by phan...@stonewolfsoft.co.uk in Audio Signal Processing8 years ago 2 replies

Greetings, This might seem like a daft question to some as it imvolves a pretty fundamental bit of theory, but for for the intended application...

Greetings, This might seem like a daft question to some as it imvolves a pretty fundamental bit of theory, but for for the intended application (which I cant go into at present), I need everything intact. No filters, window functions etc. are allowed. If you have a 2^n sample section containing a pure sine wave which has an arbritrary frequency (ie. you have an incomplete number of cycles),...


Transitional samples in AFSK encoding

Started by anonymouse in Audio Signal Processing8 years ago

I wrote an AFSK encoder but am unhappy with it. I did the math to find a sample rate where it would be an integer number of samples based...

I wrote an AFSK encoder but am unhappy with it. I did the math to find a sample rate where it would be an integer number of samples based on the bitrate so the math is easy. I would prefer to be able to use an arbitrary bitrate and sample rate instead. I am wondering what the best practices method would be for these transitional bits. For example let us assume I have the following sampl...


FFT Frequency Range

Started by bashir siddiqui in Audio Signal Processing8 years ago 1 reply

Hi, I have one very simple question. I hope some one will clearify my doubts. The range of frequencies covered in the output record from the...

Hi, I have one very simple question. I hope some one will clearify my doubts. The range of frequencies covered in the output record from the FFT is 0 to 1/2 the sample rate of the acquired data record. For example, a sample rate of 20 MS/s (megasamples per second) would give an FFT range of 0 to 10 MHz. Does it mean I can only see the proper FFT peak of the signal with maximum frequenc...


Useful grad level courses for future Audio DSP engineers

Started by aksh...@gmail.com in Audio Signal Processing8 years ago 1 reply

Hello, I'm a new grad student about to start my master's in electrical engineering. My concentration is going to be Musical Acoustics and...

Hello, I'm a new grad student about to start my master's in electrical engineering. My concentration is going to be Musical Acoustics and Audio/Music Signal Processing. I want to balance my courses with hardware-oriented courses which will give me an exposure to working on DSPs and micros. I want to possess the skills/experience the industry looks for in an Audio DSP Engineer. The courses...


perceptual volume slider

Started by mv.b...@gmail.com in Audio Signal Processing8 years ago 2 replies

Hi What formula/algorithm would one suggest for a (more-or-less) perceptually uniform user-controlled volume slider, in the range -30dB to 0dB...

Hi What formula/algorithm would one suggest for a (more-or-less) perceptually uniform user-controlled volume slider, in the range -30dB to 0dB .. ? I'm not sure I like the loudness uniformity of the linear dB slider. Thanks for any suggestions.


Thresholding for Note Onset Detection

Started by bloodfire1004 in Audio Signal Processing8 years ago 2 replies

Hi! Regarding Note Onset Detection (that is, trying to find where a new note begins), I am having problems on trying to determine what my...

Hi! Regarding Note Onset Detection (that is, trying to find where a new note begins), I am having problems on trying to determine what my threshold should be. Currently, what I am just doing is finding the maximum change in intensity and then getting a percentage of that and setting that as my threshold. The problem is that, this is troublesome if there are various degrees of difference i...


Ask a Question to the DSPRelated community

To significantly increase your chances of receiving answers, please make sure to:

  1. Use a meaningful title
  2. Express your question clearly and well
  3. Do not use this forum to promote your product, service or business
  4. Write in clear, grammatical, correctly-spelled language
  5. Do not post content that violates a copyright