On Mon, 9 Aug 1999, Daniel McCarty wrote:
> > As I recall, this was a problem with the pre-DragonballEZ devices. Is the
> > PalmIIIxe/V/VII devices' sound hardware still insufficient for DTMF tones?
>
> It's not the processors, which were always intended for tele-
> communication uses and have the ability to create DTMF tones. It's
> the low-pass filter Palm put on the piezo speaker. You can download
> the DTMF app from PalmGear or Peter Stroebel's home page and see what
> the filter makes the speaker sound like when you try to create DTMF
> tones.
With the new hardware and all, I created my own version (and one that
could play converted audio files). It isn't the LP filter on the V or IIIx
(which you could bypass somewhat by boosting the higher tones), but the
actual weakness of the speaker itself. It isn't very loud nor free of
distortion. What I get sounds like DTMF, but without some method of
isolating or conducting it to a telephone set the Phone won't pick it up.
It does a recognizable but not hi-fi version of the converted samples.
