Audacity Forum

Have a look for "Ring Modulator with two inputs" by Steve Harris.
Set the slider to "1" for Amplitude Modulation.

I;m unsure why you are getting this problem, it seems quite unexpected. However, a possible workaround (and this works better than copy and pasting anyway. Select a track (or part) and press Ctrl+D to duplicate it.

So how many of these MP3s that don't work properly do you have?
Perhaps you could upload the shortest of them onto the internet and post a link.
There must be something that is different about them.

I've not found it necessary to uninstall JACK, just necessary to ensure that it is not running when I use Audacity. I guess if you do not need JACK for anything else, then removing it completely is a straightforward option.

Check that you have plenty of free disk space.
Try rebooting your computer.
Try reinstalling your USB device.

I use "Time Shift" tool to move channel 1 audio and try my best to sync it with channel 2 audio. Yes, so that the "channel 1 audio" that has leaked over to channel 2 plays as closely as possible on both tracks - when you get it right there should be little if any echo effect not...

The mp3 that you tried there was a 128kbps CBR (Constant Bit Rate) MP3.
Let's see af a Variable Bit Rate (VBR) MP3 works. Try this file: http://easyspacepro.com/audacity/examples/piano_VBR.mp3

Not quite sure what you mean. Do you mean that you are getting a "click"sound at the edit point? If so, try and make your edit points happen at "zero crossing points"

This post by waxcylinder applies equally to Windows XP:
http://audacityteam.org/forum/viewtopic ... 910#p27396

Also see here: http://audacityteam.org/wiki/index.php? ... bar_Issues

In addition to WC's comments - check that your sound card does not have any "sound effect enhancements" (sometimes called "environmental audio") enabled.