The video used is: http://www.youtube.com/watch?v=suTKOmmoBtw. With the help of youtube-dl (http://angel-de-vicente.blogspot.com.es/search?q=youtube-dl) I get the mp3 file:
angelv@pilas:~/GUITAR-APRIL$ youtube-dl --extract-audio --audio-format=mp3 http://www.youtube.com/watch?v=suTKOmmoBtw
Then I use that one for practice, with the help of audacity. With it, I can use this track nicely for practice by:
- splitting the stereo track and muting the right channel, which has mostly the sound of the first guitar, which I'm playing. I also normalize the audio, as it has some saturation in a couple of places.
- using the "Change Tempo" effect, so that I can practice slower, but maintaining the right pitch.
For creating the final video, I created a stereo track and put the YouTube recording in the left channel (after removing its right channel, which is where most of the first guitar was recorded), and myself in the right channel (so it is more or less like I'm playing a duet with Marisa Gomez). The result is here:
As an aside: For this piece I wanted to try with my Aria Silent guitar but I just found out that the line-in jack in my Dell Latitude E6530 is one of these combined in/out connections. By mistake I bought just an audio splitter where in reality I needed a Headphone and Microphone Jack Audio Splitter, so I had to do it with the Acer Aspire 1810T netbook.