Audacity Forum

While that is technically true, Gale, it has nothing to do with the audio. It's the stream that is transported in 32 bit morsels. That's why most programs will report it as 16 bit, although it is really 15 bits. The 32 bits in an MP3, are data bits, not audio samples. MP3 uses Huffman symbols to st...

Okay perfect thanks Of course 100 second samples are not going to work in Arduino even if I slow the sample rate right down? useful to know the Math though for other applications Cheers TINLEY What durations would be better then? It hasn't to be a perfect loop, after all. You could as well do the c...

where do I put it to run it? In the "Nyquist Prompt" effect (see: http://manual.audacityteam.org/man/nyquist_prompt.html) Tip: You can save the snippet either directly on the hard drive, or more conveniently as user preset: Nyquist Prompt-->Manage-->Save Preset and it can easily be revoked by Manag...

Thanks for your efforts, Robert. I had no idea you could do this with Nyquist. I'm following this thread! You can actually do everything in Nyquist. It's just a question of the time it takes to process. The FM demodulation works pretty good but it has to be done sample by sample because of the usag...

Sorry to dredge up such an old post, but I thought I could help out a bit, as I just got into 70s cd-4 in a small, but expensive, way. I've recorded the JVC calibration/test record 4DE-205-A for anyone still wishing to continue this audacity plugin. My recording equipment includes an Audio Technica...

We know that for frequency F Hz, there are F complete cycles in 1 second, an if F is a whole number, then the number of complete cycles in 1 second will be a whole number. So what we need to do for a decimal number, is to look for a frequency that is an exact multiple of F and is itself a whole num...

Here's the Octave formula for the frequency value:
>> vpa(sym(440)*2**(11/sym(12)))

It works only with the Symbolic package installed.

steve wrote:

Robert J. H. wrote:The exact value (to 50 places) would be:
830.60939515989027704488357786743025088666010693809 Hz

Is that for G#5/Ab5 at A440?

Exactly, for equal temperament to be precise.

steve wrote:MATLAB is also a lot more complicated to use than Nyquist.

In general, only short sounds can be analyzed with Matlab or Octave. You run rapidly out of memory or indexes.
Of course, there are always workarounds...

Any whole number of samples that is an exact multiple of 96000/830.61 Try 100 seconds or 3,200,000 samples (33.333 seconds) that's a pretty nasty frequency, isn't it? The exact value (to 50 places) would be: 830.60939515989027704488357786743025088666010693809 Hz The question is now how much accurac...