On Fri, Aug 28, 2015 at 6:02 AM, Garrett Smith <dhtmlkitc...@gmail.com> wrote:
> It would be useful to have pitch adjustment for VIDEO element. There > is playbackRate, to control playback speed — useful!* And there is > vv.mozPreservesPitch, in Firefox, which can be set to false, so that > pitch will adjust to the speed of the video, sort of like old analog > gear (tapes and records). > We should standardize mozPreservesPitch. I'm embarrassed that we haven't done so already. Negative playbackRate, to watch videos backwards, currently crashes > Safari 8; Firefox 40 says "not implemented". I think it would be > entertaining for example, to watch things like cars uncrashing. Should > this work? And if so, shouldn't audio match the video speed for > backwards playing? I think "yes, and yes." > According to the spec it should work, but it's very low priority for us and implementing it would be very inefficient as Yay295 describes. So I don't think it's going to happen in Firefox in the forseeable future. But variable pitch control it would be useful for music adjustments > like "over the mountain", "Black Star", "Take your Whiskey Home", all > originally recorded at half-step detuning (A=415), none of which match > "standard tuning" commonly used in schools, industry, etc. Recordings > of Baroque era music often use instruments tuned lower (and also > different scale temperment, but that is a different issue). So it > would be nice to adjust the pitch with a `pitchAdjustment` property, > as a double, to adjust pitch in cents. > I'd prefer to focus on making sure that Web Audio's Audio Workers are powerful enough for Web developers to implement this themselves. Rob -- lbir ye,ea yer.tnietoehr rdn rdsme,anea lurpr edna e hnysnenh hhe uresyf toD selthor stor edna siewaoeodm or v sstvr esBa kbvted,t rdsme,aoreseoouoto o l euetiuruewFa kbn e hnystoivateweh uresyf tulsa rehr rdm or rnea lurpr .a war hsrer holsa rodvted,t nenh hneireseoouot.tniesiewaoeivatewt sstvr esn