Great! What are you using to decode the audio signal? How can other software program against it?
As there are several implementations of timecode-on-vinyl, perhaps the authors can agree on a format for realtime position/rate data. I can imagine other custom controllers which would fall into this category. I don't suppose there is an existing standard of some sort which would be sufficient? -geoff On Mon, Oct 07, 2002 at 04:28:26PM -0400, Juan K. wrote: > here's how i do it: > > 1st channel: > 1.5khz control tone > > 2nd channel: > bits encoded as follows: > > 0 : 1 3khz cycle > 1 : 2 6khz cycles > marker: 1 1.5khz cycle > > so each timecode looks like this: > > marker cycle > encoded 0 > checksummed bit sequence > encoded 1 > marker cycle > > each one ends up being about 8ms. so my "latency" is better than theirs! > [i'm pretty sure finalscratch's 12ms assumes the record is moving at > normal speed] > > since the frequencies are multiples of each other, the crosstalk from the > cutting head or even from the cartridge that gets used is mitigated > > the 0 and 1 starter bits help figure out what's going on depending if the > record is playing backwards or forwards > > counting zero crossings works...but don't forget to filter out the low > frequencies [like 80hz and below], since the noise from the person's hand > will fuck things up > > i'm fiending to buy one of the finalscratch control records [the guys at > platinum are telling me they're gonna be like 25 dollars], to see what > they're doing > > -- > John Ketchpaw > [EMAIL PROTECTED] > > On Mon, 7 Oct 2002, CK wrote: > > > I read: > > > Well i guess encoding absolute time should not be too hard. > > > A simple solution could be to have the two stereo channels with different > > > frequencies, with the ratio corresponding to the radial position. > > > > forget it there is no such thing as a clean channel separation on > > vinyl. > > > > regards, > > > > x > > > > -- > > [EMAIL PROTECTED] Postmodernism is german romanticism with better > > http://pilot.fm/ special effects. (Jeff Keuss / via ctheory.com) > > > > >
