I need to decide on the crossover points. I play only MP3 in the car unit
and my concern is what is the frequency range for the different bitrates.

Assumption is for a bitrate of 160kbps the frequency range is 20Hz - 20kHz
with sampling of 44000

Now when the song is downgraded for example to 128kbps, which one of he
following is true:
A- Frequencies is cut at lower and higher values (range is then say 100 -
10kHz) and sampling remains at 44000
B- Sampling is decreased but frequency range stays the same.

--
The best is yet to come
V

In article ,
"Vivek Kapoor" wrote:

I need to decide on the crossover points. I play only MP3 in the car unit
and my concern is what is the frequency range for the different bitrates.

Assumption is for a bitrate of 160kbps the frequency range is 20Hz - 20kHz
with sampling of 44000

Now when the song is downgraded for example to 128kbps, which one of he
following is true:
A- Frequencies is cut at lower and higher values (range is then say 100 -
10kHz) and sampling remains at 44000
B- Sampling is decreased but frequency range stays the same.

or C-It doesn't matter so much.

IMO If one has a wide bandwidth system it will play anything thats of
less bandwidth easily. Set xo's to within driver limits/capabilities,
not by the material that will be reproduced.

--
Cyrus

*coughcasaucedoprodigynetcough*

A low pass filter is incorporated with all encoders anyway. I encode at
320kbps VBR, and the LPF is at 19kHz I think. They're typically lower than
that.

BTW, you can encode at lower bitrates while keeping the sampling rate and
filter settings the same.

"Vivek Kapoor" wrote in message
...
I need to decide on the crossover points. I play only MP3 in the car unit
and my concern is what is the frequency range for the different bitrates.

Assumption is for a bitrate of 160kbps the frequency range is 20Hz - 20kHz
with sampling of 44000

Now when the song is downgraded for example to 128kbps, which one of he
following is true:
A- Frequencies is cut at lower and higher values (range is then say 100 -
10kHz) and sampling remains at 44000
B- Sampling is decreased but frequency range stays the same.

--
The best is yet to come
V