IMHO the robotic sound is not going away with D-Star. Of course the D-Star radios have standard FM which you can use. If you decide to sell the 91AD rest assured that it will be bought by someone quickly.
On 9/1/2010 18 43 Hours, n2gyn wrote: > > I guess I just can not live with the "robotic" sound. This is > unacceptable in this world of technology. > I am trying to find away around this before I dump the whole D-Star thing. > John > PS: I also have a 91AD > > --- In dstar_digital@yahoogroups.com > <mailto:dstar_digital%40yahoogroups.com>, Tony Langdon <vk3...@...> wrote: > > > > At 05:05 AM 9/2/2010, you wrote: > > > > > > >John, > > > > > >Try plugging a better quality speaker into the radio. > > >I personally find this does wonders to increase fidelity. > > >Icom should be ashamed of the speakers in the D-Star HT's. > > > > A better quality speaker certainly works, as anyone who's listened to > > a DV Dongle on PC speakers can attest to. Actually, I find the > > quality of the audio of my 91AD is very good (for a HT), only > > complaint is there's not enough of it for some environments. > > > > As for the "robotic" sound, well, we're stuck with it. The whole > > point of speech codecs is to literally throw away anything that's not > > directly contributing to intelligibility, to reduce the > > bitrate. There is a tradeoff here between bitrate and > > fidelity. AMBE is designed to achieve very low bitrates, so it's not > > going to sound very "natural". > > > > My own view of D-STAR audio is that while it doesn't sound natural, I > > find it very intelligible, often more so than FM in the real world > > (where there's a lot of poorly adjusted radios and radios with wonky > > audio response). I'm also able to recognise who is speaking, so > > enough of the voice is preserved to allow that. The AMBE vocoder > > excels at what it sets out to do in my opinion - provide > > communications grade speech at very low bitrates. > > > > > >I'm not sure, but there also may be something else going on as well. > > >If I set up my 80 or 880 and connect to a reflector and do the same > > >with the ID-1 using the same speaker, the fidelity improves big time > > >with the 80 and 880 but the ID-1 still sounds much better (and the > > >RF signal is much weaker). > > > > Different radios will have different audio responses. RF signal > > strength is largely irrelevant in D-STAR, until the bit error rate > > starts to increase significantly to the point that the FEC has > > trouble correcting those errors. > > > > 73 de VK3JED / VK3IRL > > http://vkradio.com > > > >
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