Re: Transmitting 100hz tone with dire for voice alert.
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I understand your intent, but I recommend against it. I was strongly admonished for using a Morse ID on my digipeater. If APRS users in your area are more tolerant, I suggest using an external tone encoder and some method to enable it during speech output. (I'm a hardware guy, the coding for this project is beyond my skill set).
Patrick (N3TSZ)
On Saturday, September 7, 2024 at 05:45:59 PM EDT, Ray Wells via groups.io <aprs@...> wrote:
This is not directed at any particular operator!
There seems to be differences of opinion on the intended
purpose/application of Voice Alert. This page may clarify the
function ...
Ray vk2tv
On 8/9/24 00:52, KC5L via groups.io
wrote:
The idea behind Voice Alert is to only transmit PL when
transmitting voice. No PL when transmitting data. Transmitting
PL all the time (by using PL on the radio) would defeat the
point of Voice Alert and annoy listeners using Voice Alert to
filter out the data transmissions.
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The following command will synthesize a 100Hz tone:
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ffplay
-hide_banner -nodisp -autoexit -f lavfi -i 'sine=f=100'
There is likely a way to use ffmpeg/ffplay to mix this
synthesized tone with the output of espeak but I haven't been
able to figure it out.
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Patrick Connor