Three tracks with Sing songs on, each one twice: as the groovebox was this morning, and with the change. These are tracks where Auto had planned to hold the lead back until the drop. Before, that plan and the rests for the sung lines added up, and the lead is not heard at all in these bars. After, the lead answers the voice: it plays for the 8 bars after each block of four sung lines, and it still rests while the voice sings.
Nobody has listened to these: they were made and measured by a program, not heard.
The same track and the same bars in both clips: bars 8 to 32: a sung block, 8 bars, then the build, 63 seconds.
The clearest of the three. The lead (a drawbar organ stab) comes in at about 21 seconds, when the voice stops.
The same track and the same bars in both clips: bars 8 to 40: a sung block, 8 bars, a sung block, 8 bars, 69 seconds.
The lead (a nylon pluck) comes in at about 17 seconds and again at about 52. It is quiet: about 22 decibels under the whole mix.
The same track and the same bars in both clips: bars 8 to 40: a sung block, 8 bars, a sung block, 8 bars, 75 seconds.
Here the two clips sound the same. The lead does come back, but on a sound (Koto) that is too quiet to hear, 34 decibels under the whole mix. That sound is as quiet on the groovebox with or without this change; it is a fault of its own and is being counted across the lead sounds.
When the voice stops, does the lead coming in sound like an answer to it, or would you rather the track stayed bare there as Auto first planned?
The lead answers for 8 bars, the length of the block it follows. That is one number: it can be longer if you want more of the lead, or shorter.