I just downloaded Audacity 2.0.5 on a Lenovo Thinkpad T400 running Windows XP Professional. I’ve used Audacity many times in the past and I’m encountering something new to me.
I’m feeding in audio of interviews (no music, just voice) from a digital audio recorder through the microphone jack. I’ve run tests to adjust both output and input volume levels. What happens is that the first 3-4 seconds of the Audacity recording play back with normal hiss and ambient sound, as heard through the DAR itself. But then the sound automatically – i.e., without any intervention from me – turns into what sounds like an overly-noise-reduced track. The voices are mostly audible but so much of the ambience has been removed that it sometimes devolves into digital blips and bleeps.
For transcribing the human voice, it’s better to have more ambient noise rather than less (provided it’s simple room tone, not jackhammer noise). NR must be applied very sparingly because a lot of vocal subtleties can be lost; e.g., f someone’s speaking volume trails off at the end of their sentences, the last several words are inaudible.
But this NR is occurring automatically. Again, I’ve used Audacity a lot, for both music and straight voice, and this is not a problem I’ve encountered before. I’ve run numerous tests and it happens every time. Is there some kind of auto-setting that I need to deactivate? Is it to do with the digital audio recorder? If so, any way I can correct for that?
Thanks in advance.