This was the killer feature. If you had a cough, a phone ring, or a sudden "pop" in the middle of a vocal take, you could simply select the offending noise and hit "Auto Heal." SoundBooth would analyze the surrounding frequencies and seamlessly paint over the mistake. It felt like using the Healing Brush in Photoshop, but for sound waves. It wasn't perfect, but for quick fixes, it felt like magic.
To understand SoundBooth, you must understand Adobe’s strategy in 2010. Adobe had acquired Cool Edit Pro (rebranded as Audition) years earlier, but Audition was deeply intertwined with Windows-specific code (DirectX and the Windows sound architecture). Mac users, who were rapidly adopting Adobe’s suite for video production, had no native high-end audio editor. Adobe SoundBooth CS5
Simultaneously, Adobe Flash was still a dominant force for web video (before HTML5 killed it). Flash developers needed a tool to record, edit, and compress audio specifically for .flv and .swf files. Thus, SoundBooth CS5 was born—a cross-platform audio app designed for speed, restoration, and SWF integration. This was the killer feature
While SpectraLayers and iZotope RX are now the gold standard, SoundBooth CS5 offered a highly visual spectral display. You could view audio as a spectrogram (frequency over time) rather than just a waveform. This allowed users to paint away unwanted noises—a cough, a microphone pop, or a siren—using a brush tool. This "healing brush" worked similarly to Photoshop’s Spot Healing Brush. You could literally select a frequency range and "clone" clean audio over the noise. It wasn't perfect, but for quick fixes, it felt like magic
Despite its strengths, Soundbooth had notable weaknesses: