3 ms·
Ask HN: Why do sped up videos pitch correct only in Chrome?
In Firefox or Safari sped up videos sound tinny. It is especially evident at 2x speeds.
- sgillen 8y agoBy default if you speed audio up it will sound higher pitched. Chrome must being doing something special because they noticed people liked watching videos at 2x but found the high pitched noise annoying. Maybe they downsamples insteadnkf actually shrinking the spectrum of the audio.
- twtw 8y agoDownsampling alone will not achieve this. It's typically done via phase vocoding or SOLA.
- gcb0 8y agosounds equally bad on all three here.