The following is a download link for the sources for the Laminar Research default Boeing 737-800 sound bank. The project requires FMOD Studio 2.02.19 or greater. You can download FMOD Studio from the FMOD site.
You can use this project to learn how the sound for the 737 was created and experiment using the Live Reload feature. As the License below explains, you can only use it for learning purposes and you may not redistribute any part of it.
License
LICENSE AGREEMENT: B737 FMOD PROJECT AND SOURCE AUDIO CONTENT This B737 FMOD Project and Source Audio Content License Agreement (the "Agreement") is a legal agreement between you and Laminar Research. By downloading, viewing, and in any way using this B737 FMOD project file (the "PROJECT"), you agree to be bound by the terms of this Agreement. If you do not agree with this Agreement, do not use this PROJECT. All rights not expressly granted to you here are reserved by Laminar Research. Upon acceptance of this Agreement, Laminar Research grants a license to you to use this PROJECT expressly for educational or personal purposes only. This license is granted worldwide and in perpetuity. This Agreement includes license terms for: a) The PROJECT, and any .bank files built thereof (altogether, the "FMOD CONTENT"), and b) The included .wav sound files (altogether, the "SOURCE AUDIO"). GRANT OF LICENSE: 1. FMOD CONTENT: You may modify, remix, redesign, and build upon the FMOD CONTENT. You may NOT share the FMOD CONTENT, original or otherwise modified. You may NOT broadcast video of the FMOD CONTENT, original or otherwise modified. You may NOT use the FMOD CONTENT for commercial or non-commercial purposes. You may NOT share, copy, or otherwise redistribute the FMOD CONTENT or any part of it. 2. SOURCE AUDIO: All SOURCE AUDIO is owned by Laminar Research. You may NOT share, copy, or otherwise redistribute the SOURCE AUDIO. You may NOT use the SOURCE AUDIO for any commercial or non-commercial purposes. You may modify, remix, redesign, and build upon the SOURCE AUDIO, provided it is strictly for PERSONAL use. If you have any questions about this Agreement, please contact Daniela Rodríguez Careri at <daniela@x-plane.com>.