Use free software like Audacity to trim, speed up, or loop the sounds to fit your project. Do you need these sounds for: A video edit ? A game or app ? A presentation ?
A great source for quick, free WAV and MP3 downloads. Types of Monkey Sounds to Look For zvuk makak skachat
Ensure the sound is free for your intended use (commercial or non-commercial). Use free software like Audacity to trim, speed