JProgressbar too slow

I am trying to implement something similar to a VU meter.

I need to detect the input from a microphone and display the amplitude on a meter of some sort.

I tried using JProgressbar but it seems to be very slow at displaying.

It can't keep up with the updates.

Does anyone know of an alternative to a JProgressbar for displaying or anyway to speed up JProgressbar?

Thanks.

[409 byte] By [artfuldodgera] at [2007-10-2 20:19:24]

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# 1

> I am trying to implement something similar to a VU

> meter.

> I need to detect the input from a microphone and

> display the amplitude on a meter of some sort.

> I tried using JProgressbar but it seems to be very

> slow at displaying.

Your eye will be too slow to see the changes in normal sound. Anything above about 25Hz will be lost!

Possibley what you need to do is find the mean sample sound amplitude value over each (say) 0.1 second period and display it.

sabre150a at 2007-7-13 23:01:32 >

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# 2

You could try using a real-time graphing package. Or write your own paint method to draw the line of the correct length.

BaltimoreJohna at 2007-7-13 23:01:32 >

# 3

I think I am doing that but the timing issue is what I don't understand how to do.

artfuldodgera at 2007-7-13 23:01:32 >

# 4

> You could try using a real-time graphing package. Or> write your own paint method to draw the line of the> correct length.The eye would still not be able to keep up!

sabre150a at 2007-7-13 23:01:32 >

# 5

> I think I am doing that but the timing issue is what> I don't understand how to do.Simple maths! Take the modulus of each sample and accumulate these over a 0.1 second period.

sabre150a at 2007-7-13 23:01:32 >

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