In a recent review, Tom's Hardware posted some MP3 encoding benchmarks here:
http://www.tomshardware.com/motherboard/20040719/intel_925xe-15.html
You can see that the latest Pentium 4 encoded a given .wav in 1:20, which, if I've done the conversion right, is about a 14x conversion rate.
On my laptop, a Powerbook G4 (800mhz), I recently converted some .wav's to mp3s in iTunes with similar encoding settings (320 VBR), and it reported around 13x-14x conversion rates. I also remember a while ago when I tried to encode MP3s on my Dual 1900+ box with LAME I was getting relatively slow conversion rates- like 8x and below- with slightly lossier settings. I've also had the experience of getting 20x conversion rates with iTunes on my dual 500mhz G4 desktop (iTunes is MP-aware), though that was a while ago and I don't remember how similar the encoder settings were, but I know they were close.
I'm pretty sure iTunes uses LAME (though I believe the original app they spun iTunes off of, SoundJam, did), but in any case is the much-faster-conversion-on-mac that I'm seeing due to the encoder or is there also some difference in hardware that's significant here? I'm asking this because when I saw the mp3 encoder benchmarks I was suprised the processors did not do better. *Not trying to start a PC-vs-Mac flamewar*
http://www.tomshardware.com/motherboard/20040719/intel_925xe-15.html
You can see that the latest Pentium 4 encoded a given .wav in 1:20, which, if I've done the conversion right, is about a 14x conversion rate.
On my laptop, a Powerbook G4 (800mhz), I recently converted some .wav's to mp3s in iTunes with similar encoding settings (320 VBR), and it reported around 13x-14x conversion rates. I also remember a while ago when I tried to encode MP3s on my Dual 1900+ box with LAME I was getting relatively slow conversion rates- like 8x and below- with slightly lossier settings. I've also had the experience of getting 20x conversion rates with iTunes on my dual 500mhz G4 desktop (iTunes is MP-aware), though that was a while ago and I don't remember how similar the encoder settings were, but I know they were close.
I'm pretty sure iTunes uses LAME (though I believe the original app they spun iTunes off of, SoundJam, did), but in any case is the much-faster-conversion-on-mac that I'm seeing due to the encoder or is there also some difference in hardware that's significant here? I'm asking this because when I saw the mp3 encoder benchmarks I was suprised the processors did not do better. *Not trying to start a PC-vs-Mac flamewar*