Audacity Forum

I just need a suggestion of how I can check the quality of mp3 I got from the internet. In a simple answer.. you don't! I don't think there's any way you can tell how many times a file has been reencoded. Yes each reencoding will make more damage, but I don't think there is any (simple) mathematica...

The easiest way I found for being able to open that file with audacity was to use mplayer's dumpaudio to create a new file like this: I could then successfully import newfile.wav into audacity.

Ok I got ffmpeg working (I had 0.6 and audacity only works with 0.5). I can now successfully import the 48 and 96 files into audacity. The 44 one still fails of course because audacity thinks it's a stereo wav file, which is not. I don't know how to workaround this without changing the file. Now the...

Thanks I only requested for the files because you said they were publicly and freely available. I've downloaded it and looked at the files. The 44.1kHz file is different from the others. The audio codec might be the same but the file headers are probably different. This is what "file" comm...

To plot a spectrum in Audacity (1.3.12) select the part of the track you want to analyze and then go to the menu Analyze and select Plot Spectrum... But that's not a very accurate way of analyzing what you propose... Frequency response will depend mostly on the audio in the file... If it's a bass on...

There's also a codec called speex (http://www.speex.org/) which is optimized for speech. It can delivery very good quality at very low bitrates for speech-only audio tracks. But that would be usuable only in a computer. It's very unlikely that any car radio would read that.

If you can use mp3, then you'd have advantage in exporting as mono, since you can have the same quality for half the bitrate compared to a stereo track. For voice and mono you'd probably be happy enough at 64kbps bitrate, and that would allow you to put many hours in a single cd. CDs with mp3's are ...

What do you mean by transcoded files? And what's the relation of that with frequency analysis? The term transcoding usually refers to converting one digital format to another (different) digital format: http://en.wikipedia.org/wiki/Transcoding Whether that will imply a change in the frequency spectr...

To listen to the first track while you record the second track you have to activate overdub (Transport menu).

Reinstalling won't reset audacity's preferences. Check this topic in the wiki: http://wiki.audacityteam.org/wiki/Audacity_Preferences#Resetting_Preferences_to_defaults_2 Can you explain in more detail your procedure step by step, what's the expected behaviour and the actual behaviour? So that we can...