BigSpeed Voice Chat SDK

Create you own voice chat client and server in minutes

Version 4.0 - November 24, 2008
Idea
Voice chat has become very popular for both business and personal use. In business, it provides a way to contact co-workers any time of the day while saving time and money on telephone tag.
BigSpeed Voice Chat SDK is an easy-to-use set of client and server ActiveX components designed to build virtual private chat networks for small to medium groups, typically up to several hundreds of desktops. Based on mixed client/server and peer-to-peer technology, our SDK provides totally secure text and voice messaging through powerful on-the-fly encryption.
Architecture


Design
Building a private voice chat network
NAT and Firewall friendly
A direct connection between two clients is not necessary, instead a permanent virtual circuit is established. The server relays all the packets traveling between clients.
Ability to conduct one-to-one or one-to-many voice sessions
Silence compression with a voice activity detector
Echo suppression with a double talk detector
Audio data available in raw PCM format for visualization
Detection of input signal overloading
Detection of packet delaying on network slowdown
Capability to mute recording
Capability to mute playback
Instant alert messaging
Instant chat messaging
Direct file transfer
Binary data transfer (array of bytes) between clients
Binary data transfer (array of bytes) between clients and the server
SOCKS proxy support
On-the-fly 128-bit AES encryption with random session keys
Client authentication at protocol level with digital fingerprints or secret keys
Client authentication at application level with username/password
Symmetric encryption mode with shared secret key
Asymmetric encryption mode with 1024-bit Public/Private keys
Elegant event-driven paradigm for easy integration into Windows applications
Responsive user interface while maintaining maximum bandwidth
Simple and well-organized set of properties, methods and events
Multi-threaded, fully self-contained ActiveX control
Freeware version
BigSpeed Voice Chat SDK is available free of charge for non-commercial use. Sample applications are included in Visual Basic 2008 and Delphi 7

Click on the link below to download your free copy now.

Free edition - $0, up to 6 concurrent connections

Feel free to share this copy with friends and colleagues.
Registered version
BigSpeed Voice Chat SDK is available in a Plus edition for commercial use, which comes with royalty-free distribution rights. It may be purchased using a credit card, international money order or check. After completing the payment, you will receive an email with instructions how to download the registered version.

Click on the link below to purchase a commercial license online. Your order will be processed through our partner Share-it.

Plus edition - $350.00 USD , unlimited concurrent connections

Registered users are eligible for free technical support and free upgrades to minor versions.
New in this release
A new communication engine is employed for smoother audio streaming
(c) BIGSPEED Computing Inc. 1998-. Mastering algorithms.