Friend, I might have a solution: Reaper! Select all files in the proper order. Then, with an empty Reaper project ooen, drag the files in, and it should ask you if you want to put them on separate tracks or all on the same track. Choose the same track option and they SHOULD all be there, in order, back to back. For many more Audacity Tutorialshttp://www.makeandbreakeducation.com/membership-options-page/This Audacity tutorial shows how to sync audio and video. Thi Create a new stereo track (rather than create a new mono track) which will appear at the bottom. Copy and paste the single mono track you want to make pseudo-stereo into it, (it will become dual mono). Delete* or mute* the original mono track and apply the pseudo-stereo effect to the dual mono version. [* optional: you may want to keep the Try using a crossfade between the two tracks. Crossfading is slightly different from a normal fade in/out. Instead of a linear transition, crossfading uses a logarithmic curve to keep the volume constant all the way through. Audacity has built-in crossfading effects if you want to give it a try. PasteCtrl + V. Pastes audio which has been cut or copied to the Audacity clipboard, either inserting it into the selected track (s) at the cursor point, or replacing the current selection region (s). The behavior of the paste command changes depending on the setting of "Editing clips can move other clips" in Tracks Preferences. If the option is How to Merge Two Audio Files In Audacity (2021), Combine Multiple Tracks into One Musician Startup 15.9K subscribers Subscribe Subscribed 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 Download Audacity. Option #1. Move clips horizontally. First, open Audacity and start an audacity project. Then, import audio and you'll notice the waveform appear on the Timeline. All your tracks appear on this Timeline and can move to the right or the left using the Time Shift Tool. The Time Shift Tool allows you to shift the point in time From the Avidemux menu, choose Audio => Main Track. In the dialog, change the Audio Source option from Video to External WAV. Click on the Browse button to select the aligned audio track. Click OK. This gives you a video with the audio track replaced by the separately recorded and correctly aligned audio track. 1kIKp.