Yes but Switch destroys them! ;-) I've compared converted files after Switch, iTunes, XLD and a few other apps, the results are amazingly different!
Though Switch is very handy, I've abandoned it because of the damages it does to the sound; iTunes is surprisingly only a bit better while I rely plenty on XLD (and even the old Max in some case).
I'm going to try MediaHuman as I'm still searching for a nice drag'n drop audio converter.

Aargl, how were you able to determine the damage done by Switch and others? I'm curious about your analytical techniques, as I too have been casually comparing MediaHuman, iSonics, XLD and others. My only metrics are my ears and overall user experience, but I've decided that XLD probably produces marginally better conversions — including not only audio fidelity, but file structure and compatibility with other audio apps as well. However, my opinion may be colored by XLD's long tenure, more 'professional' character, very frequent updates, and nearly overwhelming wealth of both useful and esoteric options.

But, given XLD's lack of a common GUI for the main task of adding and converting files, it's not very user friendly. Though its output sounds no better or worse than XLD's, for most tasks I now prefer MediaHuman's interface and ease of use, and I love that it's free like XLD. iSonics' interface is nice too (maybe even a bit nicer than MediaHuman's), but otherwise I find no difference between the quality of its conversions and that of MH (while iTunes' are notably inferior), but why pay $10 for iSonics when MH is free? That one important difference means a lot to me, even though I had already bought an iSonics license when I discovered MH :(

If you could, please let us know your impressions, especially if you're able to include iSonics in your comparisons

Hi! Thanks for sharing your experience, that's what MU is also for, to me. :-)
Damned! I forgot to test MediaHuman! It's there in my App folder, but I had much else to do since then... :-(
Well my test procedure has been as yours (ears, even if it's generally hard to tell the difference for resolutions above 160Kbps VBR) and then more technical:
- take a .wav file of a well mixed song and measure it with Amadeus Pro's spectrum analyzer
- convert it to the chosen format (.mp3, .aac...) with each app and do the same measurements
- compare both graphics above say 16KHz
I haven't found anything more precise than Amadeus to give an idea of what happens to high frequencies, but you'll agree both graphics should be as close as possible, no matter how reliable the analyzer is. ;-)
I haven't stored the results of my former tests and don't remember all the details.
As those tests are time consuming and I haven't an iSonic license, I'll be happy to read your results if you do them. ;-)
Keep on rockin'!

P.S.: I've recently noticed a bad collateral effect of conversion (due to quantization distortion), that Amadeus reveals through its stat feature. When converting a song that peaks near 0dB, you may have an impressive number of clippings! The best converter should include a clipping protection that would lower the level to -2 or -3dB before conversion — but frankly, I haven't heard those clippings in my tests: as long as they're occasional peaks, it's not that awful... ;-)

P.P.S: Oh! I remember something about Amadeus, if you use the "save us" feature to convert files and then see the stats, you'll see no clippings, but re-opening the converted file they may be thousands! (I suppose the stats are still using the original file though the converted file being displayed... ;-)
(hmmm, I should post this on Amadeus troubleshooting, indeed! :-)

??

This is an audio converter, not a video converter.

Sorry for the double post. Not intended.