[Flac] Standard encoding rates?

Andrew Snare
Wed, 06 Apr 2005 01:10:35 -0000

On Tue, Apr 05, 2005 at 08:26:45AM -0700, Ralph Giles
wrote:
> AM radio is lower quality (mono) but I don't know
> what the digital equivalent would be.

Just a minor nit-pick: AM radio can be stereo. However its use is almost
nonexistent. See <http://users.hfx.eastlink.ca/~amstereo/amstereo.htm>
for more information.

> Telephone is nominally 8 kHz mono
> (i.e. really bad) though I think the use of digital voice codecs in the
> last 20 years may have improved on this a bit.

Telephone lines (POTS) have a frequency range of 300-3400Hz. That
means 7kHz mono should be enough, although 8kHz is generous towards
the transition bandwidth/roll-off.

 - Andrew