486/33 vs Am5x86/133: Winamp скачать в хорошем качестве

486/33 vs Am5x86/133: Winamp

Compares a 33 MHz 486DX and a 133 MHz AMD Am5x86 playing back MP3 audio in Winamp 2.65. The track is Only This Moment by Royksopp, encoded at 128 kbps, 44.1 kHz, joint-stereo. Playback only occurs at half-rate in mono, however. With these settings, the 486 maxes out and audio playback is extremely choppy. The 5x86 fares a bit better; playback is relatively smooth while only utilizing ~55% of the CPU. Turn up the decoder quality any more and even the 5x86 starts to hiccup. In other words, this is about the weakest PC that can playback MP3 audio while maintaining (half-way?) decent quality. Incidentally, this track was actually encoded from an uncompressed WAV on the 5x86 using LAME 3.97. The process took 32:45 for a track length of 3:55 (0.12x real-time)! Given how common compressed audio is nowadays, it's easy to forget how computationally intensive MP3 playback can be. For those who don't know, MP3 compression basically involves chopping the audio signal into small ~30 ms "frames", converting those into the frequency domain using a MDCT (a Fourier-like transform), and then using complex psycho-acoustic heuristics to discard frequencies that won't be perceived given the spectrum of the frame. System specs: Intel 486DX/33 (8K L1) or AMD Am5x86-P75 (16K L1) 256K L2 cache 20MB RAM 20GB HD (fully recognized!) Windows 98 Edit: For those interested, here is a link to a marginally formatted Excel spreadsheet that contains other benchmark data I gathered for the 486, 5x86, and a few other reference systems: http://rapidshare.com/files/297774954...