samples where aps or ape has a problem Options

[2Bdecided]

I'm sure this has been asked before, but I can't find it, and it's not in the FAQ (it should be - please!)

On which samples is --alt-preset extreme audibly better than --alt-preset standard.
On which samples is --alt-preset insane audibly better than --alt-preset extreme.
On which samples is --alt-preset insane not transparent?

Cheers,
David.

[Gabriel]

David, would you try adding --athtype 0 to preset 128?

This could be a workaround against the source of the problem.
My idea is:
Gpsycho estimates tonality up to cwlimit (around 8kHz by default). Upper freqs are all considered to be noise sounds and not tonal sounds. As noise is generating more masking, upper freqs have more masking than lower freqs.
If I'm not wrong, Nspsytune is computing tonality up to the higher relevant part (sfb20?), so higher freqs have less masking than with Gpsycho.

Athtype 0 would increase the masking for the higher freqs. This is obviously not the right solution. Imo the right thing to do would be to have non linear spreading for Nspsytune.