[mcp6453[_2_]]

Remind me. With MP3, 128K Stereo is the same quality as 64K Mono, but 128K
Stereo is the same quality as ~96K Joint Stereo? What's the correlation,
assuming all other factors are the same except separation.

[Peter Larsen[_3_]]

mcp6453 wrote:

Remind me. With MP3, 128K Stereo is the same quality as 64K Mono, but
128K Stereo is the same quality as ~96K Joint Stereo?

No it is not, not if joint stereo allows reducing stereo spread or reducing
to intensity only.

What's the
correlation, assuming all other factors are the same except
separation.

The correlation is that the more correlated the two channels are, the less
space they will take up in a mp3 file, but increasing the correlation comes
from reducing spatial information. Allowing MS encoding can give you more
quality at same bit-rate, but allowing intensity only will cost ya. Some mp3
encoders may know best, other allow user choices. Information lost in
encoding is perpetually lost from the encoded file and can not be added
later.

Kind regards

Peter Larsen