HS COM is a software library (with full C source code) that allows a calling user application to access serial communication ports (COM devices) under 32-bit MS Windows operating systems. It allows to transmit data, receive data and control line signals (such as RTS and DTR).
HS COM library provides a convenient "packaging" to standard Win32 API by exposing only a few simple API services to a calling application
AudioLab VCL 3.1 - Delphi/C++ Builder VCL components library for fast audio processing. Allows audio capture, processing and playback with zero lines of program code. The library supports large number of formats and technologies. Free for non-commercial use.