REAPER (Rapid Environment for Audio Prototyping and Efficient Recording) is a powerful but sensible Windows application that lets you record, arrange, edit, and render multi-track waveform audio. REAPER provides an extensive set of features, but is a very small and lightweight application as the installer is less than 1 megabyte, and includes many effects and a sample project.

Basic features:

• Supports ASIO, Kernel Streaming, WaveOut, DirectSound for playback and recording
• Reads WAV, OGG, and MP3 files, records WAV files
• Lets you arrange any number of items in any number of tracks
• Supports audio processing plug-ins (DirectX and Jesusonic)
• Volume, pan controls and envelopes per track
• Multi-layer undo/redo support
• User creatable color themes

Advanced features:

• Unlimited bus support with collapsable bus views
• Item grouping
• Selection length granularity to ease in loop cutting
• An architecture that allows you to easily cut loops of many tracks simultaneously
• Support for plug-in generated media
• 64-bit floating point sample pipeline for high quality
• Advanced recording and monitoring options
• Options to build peaks for recorded files on the fly
• Controls for the user to specify where recorded files go
• Template support to make it easy to load a project template
• Input channel name aliasing