On SoundDogs, I found the sound of a marker drawing on paper for ca. one second:
The problem however is that I need the sound of a marker (or felt-tip pen) that lasts for 2.5s.
Are there methods to extend that sound so that it still sounds natural?
What I already tried:
Stretching the sound. As expected, the result is unnatural, especially in the beginning and in the end.
Repeating parts of the sound. The repetition is clearly audible.
Repeating parts of the sound, and crossfading between them. During the crossfades it is clearly audible that there is a transition between sounds.
What I may try is recording the sound myself, but I don't have experience with that, I don't have perfect silence here, and I only have my laptop, my smartphones, and an ancient digicam for doing the recording. At least, I don't need very high quality, and a bit of ambient sound doesn't hurt.
Software at my disposal:
Sony Movie Studio (light version of Vegas)
Sound Forge Audio Studio
Everything free that runs on Windows or Linux.