Since some months ago, while recording from an external tape recorder, after 3/4 seconds, the sound just decreases to a minimum level. If i stop the tape and starts again, the sound increases the volume to the normal level, but after a few seconds decreases again. I tried every possible option, and it does´t fix the problem. The cables and the plug are ok, as I can read the files in any emulator, so the problem is with Audacity. Anyone had this problem before?
Thanks in advance
I don’t understand exactly what you’re doing but make sure you’ve turned-OFF [u]Windows “Enhancements”[/u].
Since some months ago, while recording from an external tape recorder, after 3/4 seconds, the sound just decreases to a minimum level. If i stop the tape and starts again, the sound increases the volume to the normal level, but after a few seconds decreases again.
That sounds like a problem with the tape recorder… Or, is that happening when you try to record (digitize) with Audacity?
The cables and the plug are ok, as I can read the files in any emulator,
What’s an “emulator”? What “files”? Do you already have digital computer files?
Hi, thanks for replying. Tape recorder is ok (I tried with at least 6 tape recorders, are they are all fine). It just happens when I record with Audacity.
BTW, I´m recording old file computers (Sepctrum) to wave. Emulator allows me to play the old files on my pc.
Will try this solution: “If the recording is fading out after a few seconds, look for a “Noise Suppression” setting you can turn off in the Recording side of the sound device settings.”
Nope, doesn´t work. The “noise supression” just goes on. 
Did you find any Windows Sounds Enhancements?
Please check Windows Control Panel, Sound, Communications tab. Select “Do Nothing”.
This might be a case where the signal input from the external source, or Audacity processing that signal, may appear to Windows to be a scenario where the signal output of certain apps (WinAmp in my experience) needs to be muted giving priority to some other application (false positive on a web page’s “audio player” in my experience).
Sorry for dragging this one back from the dead. But has anyone figured out a fix to this? I use a Mac not Windows with Audacity but kept on version 2.0.5 for years because of this audio fading out issue. 2.0.5 was the last version I found that it would record the full length of a tone for me without fading out. Unfortunately due to some computer upgrades version 2.0.5 is no longer supported for me to use so I had to update to version 2.4.2 and guess what is happening now? I try to record tone sets and any over 2 or 3 seconds in length fades to basically nothing so this is still happening. This is EXTREMELY frustrating when trying to record tones that are 8 to 10 seconds long and having it fade after 2 or 3 seconds each time. My computer settings have been checked and are fine. My built in mic settings have no noise reduction or filter settings to cause the drop off. And I can’t find any way to fix this in any of the Audacity settings. So I have no idea why the older versions up to 2.0.5 worked fine but the newer ones basically make my using this for recording almost useless.
If it works I added a screen cap of an example recording I just threw together quickly as an example. You’ll see it records fine for the first 3 or 4 seconds then the level drops off (I DID use the Amplify effect after recording to increase the volume so it can be seen easier but did no other edits). Everything the whole recording of that tone should look and sound as it does in the first 3 or so seconds of it’s recording. The tone length should be 8 to 10 seconds in duration ad a steady 716Hz if anyone can try and replicate of find a solution.
I replied to this at your other posting.
https://forum.audacityteam.org/t/audio-fades-after-3-seconds-while-recording-again/58820/1
That’s for a Mac, but the conditions are similar for Windows.
We more or less know why this is happening, but the solution may take a little detective work.
Koz