This is supremely cool, thanks for sharing. I'm probably missing something obvious but why would the casting be any more expensive than any other pressing?
Not terribly informed about the pressing process, but as I understand it, it is (or was) effectively a player-process in reverse.
A needle creates the groove(s), replete with bumps for sound, in a not-quite-set (slightly soft) master disc - and I _speculate_ those follow a specific path defined by the mastering tool.
In comparison, playback just drops the needle in the track, and it necessarily follows the extant spiral form.
Making the master of a multi-groove record I'm assuming would require recalibration of the groove-defining mechanism (doubtless carefully designed for conventional layout), once for each of the grooves you want to make, ensuring they each stay within the boundaries defined by the previous grooves.
Jedd|1 year ago
A needle creates the groove(s), replete with bumps for sound, in a not-quite-set (slightly soft) master disc - and I _speculate_ those follow a specific path defined by the mastering tool.
In comparison, playback just drops the needle in the track, and it necessarily follows the extant spiral form.
Making the master of a multi-groove record I'm assuming would require recalibration of the groove-defining mechanism (doubtless carefully designed for conventional layout), once for each of the grooves you want to make, ensuring they each stay within the boundaries defined by the previous grooves.