Audacity Forum

looking at the audio, i think it is the entire bright blue section in the middle and the rest is all noise. Is there a way to remove this? No. If the noise is so loud that it masks the audio that you wish to hear then you need to re-record without the noise. If this task is in relation to legal pro...

I guess maybe I should be asking about the alternative as well. Let's say we get nowhere with ultra low frequencies, how do I change the frequency of the audio file to be just above human range of hearing? Say, above 20khz. Normal speech speed, but higher in frequency; dog range of hearing, but jus...

If it's possible to change the frequency of a speech file (without changing the speed of it) to 300hz, I'd like to know how. With the "Change Pitch" effect. However, in the process you will lose at least 85% of the audio information. Low frequency has a long wavelength whereas high freque...

But I'm aiming for it to be perceivable words Sorry but that is physically impossible. In order to communicate words requires a certain amount of "data" (whether that be digital or analog data). A band-with of 20 Hz does not provide enough data per second to carry speech in real time. Apa...

Has anyone else seen the problem before? Yes, it's because you are exporting as 16-bit. Audacity works internally in 32-bit float format, which is an incredibly high quality audio format. 16-bit format on the other hand is "only" CD quality (which is still very high quality). In order to ...

What sort of "messages"? Speech? You could pass speech through the "Walkie Talkie" filter (In the "Equalization" effect) and then slow it down with the "Change Speed" effect set to "Percent Change: -99.000". That will give you a frequency band-width ...

JoeP83 wrote:Correction. I meant 15 or 14 Hz.

How do you intend to play the sounds? Very few loudspeakers go below 20 Hz, and most don't even get that low.

You know this from your conversations with them? What does theirs do? Yes, from conversations with "them". Their test break up the audio into "chunks" at detected silences. It looks at the leading silence (part of the requirement) and at the silences between words/sentences. It ...

Is it actually working I ask myself Yes it's working, but this is a good example of the limitations of this "ACX test" plug-in. The actual test that ACX use is a lot more sophisticated than this simple Nyquist plug-in, and would not be fooled by your "SampleAudioPassed-Fail.wav"...

I shouldn't go asking for Windows help on the Audacity forum, and I don't know if doing that would get me banned. If you diverge too far from discussion about Audacity, we may direct you to a more relevant on-line resource (such as a Microsoft website), but such comments are not at all likely to ge...