The Beat Conductor wrote:Audactiy is a **** piece of ****! 
Audacity has its uses.
For example, when I'm creating a mix from mp3's, Audacity allows me to save the mix without having to re-encode the entire file every time I want to save. Peak nor Soundforge allows this.
Additionally, Audacity, like an Apex DVD player, will open any file you throw at it. I've had both Recycle and Peak refuse to open up files that Audacity simply smiled and opened.
As for Peak, it's cool, but trying to highlight a portion of a file is a HEADACHE. Whereas in Soundforge you can grab the right portion of the highlighted section and just drag it further right, in Peak, you have to hold down shift and click at the spot where you want the highlight to end. If anyone knows what I'm speaking about, then you know that you may spend a lot of unnecessary time trying to highlight a section.
Also, unlike Sounforge (once again), Peak doesn't give you any alternate algorithms to choose from during timestretching. Soundforge let's you choose between six different algorithms, whereas Peak seems to only have one (with a variable slider for quality).
Additionally, to save you the wasted time looking for it, the timestretch function in Peak is referred to as Change Duration.
I don't know why Sony doesn't port Soundforge to the Mac. I hate having to go back to my PC for Soundforge's ease of use. They also need to work on version 8, because when I tried it, it was buggy as hell.
Lastly, I haven't used DSP Quattro, but I have heard good things, such as being able to load up a VST/AU instrument and record your playing. Don't know if Peak 5 might have this, but 4 surely doesn't. If DSP can also quantize the piece, then I would have to say bump opening Logic until it is ultimately necessary.
That's my 0.02.