Re: bridging ASL, DMR and DSTAR
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I see what you're getting at, Ken. I wonder if anyone has tried G722 on ASL? I think I have a desk phone that supports it, maybe I can try it out and see what happens.
On Wed, Oct 2, 2019 at 11:09 AM Ken KE2N via Groups.Io <firstname.lastname@example.org> wrote:
going the other way (DMR/C4FM-> Analog) could use help too. It seems the vocoders are quite capable of making a lot of sound energy in the 3-4 kHz range. It's what gives those digital modes a characteristic "sharp" sound. Unfortunately, on the ASL side, things are affected by the 8 ks/sec rate. Although it is theoretically possible to reproduce 3.99 kHz sound with this sampling rate, audio gets more and more distorted as you go above 3 kHz. It would be a big improvement if the digital stream were filtered through a steep low pass filter - with a shoulder just above 3 kHz - before being passed to the analog side of things,