Rogue Amoeba has updated Audio Hijack, its US$16 tool for recording audio on a Mac, to version 2.0, and Detour, the $12 application for controlling where your audio is going, to version 1.1.
With Audio Hijack, you can save audio from almost any application to an AIFF file. This file can then be played in any audio player. Version 2.0 sports a new interface, improved timed recording, a built-in Excitifer effect for improving audio quality, a toolbar with built-in level meters, post-processing options for recordings (you can save to MP3 or AAC via iTunes), direct URL entering, an automatic preset saving, a new Dock menu, and more.
Detour allows you to send audio to different output devices on an application-specific basis. For instance, you can send music from iTunes to your external speakers and keep the beeps and blips of iChat going through your computer’s built-in speaker. You can mute any application’s sounds all together and change the volume of some applications relative to others.
Version 1.1 adds support for redirecting screensavers and fixes a variety of bugs. Both Audio Hijack and Detour require Mac OS X (10.1 and higher).