Bill & Pookie wrote:
> I think you are making this way to complicated.  To the best of my
> knowledge, the speaker is controlled by a single bit and a square wave is
> sent to it to produce the tones.
> 
> The speaker has a limited response and the volume will start decreasing at
> some higher frequency as the mechanical parts of the speaker can only move
> so fast.  By decreasing the on time of the input to speaker you will
> effectively be increasing the frequency that the speaker responds to, and at
> some point the volume should start decreasing.
> 
> So by knowing what on pulse time produces full volume and what on pulse
> width produces no sound, you can control volume with the on pulse width
> while keeping the original frequency.
> 
> Bill

Of course, but I have no control over the generated signal for the
speaker. I just want to post-process it to vary the volume. Plus the
difference in (sound) pulse width would become noticeable many times.

-- 
Hector Martin (hector@marcansoft.com)
Public Key: http://www.marcansoft.com/hector.asc

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