Scott:
Yep, fine equipment can do wonderful things (the added dynamic range at
24 bit can be spectacular), but I rarely connect my IC-92AD to my
Klipsch Forte II speakers. :)
Chuck
On 9/2/2010 9:12 PM, ZL1CHM wrote:
I work in pro audio and can hear the difference in 16bit and 24bit.
, September 04, 2010 11:38 AM
To: dstar_digital@yahoogroups.com
Subject: Re: [DSTAR_DIGITAL] Re: Bit Rate?
Scott:
Yep, fine equipment can do wonderful things (the added dynamic range at
24 bit can be spectacular), but I rarely connect my IC-92AD to my
Klipsch Forte II speakers. :)
Chuck
On 9/2
- K6Jm
- Original Message -
*From:* Jozef mailto:jo...@metaphoria.org
*To:* dstar_digital@yahoogroups.com
mailto:dstar_digital@yahoogroups.com
*Sent:* Thursday, September 02, 2010 1:44 AM
*Subject:* Re: [DSTAR_DIGITAL] Re: Bit Rate?
D-Star, to me, will NEVER
I work in pro audio and can hear the difference in 16bit and 24bit. audio
Saying that, I also think 28bit would be overkill being CD audio is only
16bit. Perhaps what was meant was 28kbps as in mp3 audio
73
Scott
zl1chm / n0hok
- Original Message -
From: Joel Koltner
Hello Jim.
Quite agree with all you say.
Plus: the D-Star system I have now allows me to sit in the garden with
a handheld running 100mW and speaking to someone AND being able to
understand them, on the other side of the world. Yes I could fire up
HF battle through the QRM, QRN and idiots and do
D-Star, to me, will NEVER EVER, replace HF/SSB/CW and the thrill and
romance of being able to communicate with another human being without
any corporate infrastructure in-between. To give that up would be to
surrender to those that control the infrastructure. I am not about to
that, nor
There are other codecs and vocoders that provide better audio
reproduction than AMBE. That's just a fact of life. There are some
(EMBE) with worse characteristics. I do not enjoy using P25 for this
reason, either in Amateur or public safety service. (In fact, I believe
the poor audio
, September 02, 2010 8:35 AM
To: dstar_digital@yahoogroups.com
Subject: RE: [DSTAR_DIGITAL] Re: Bit Rate?
This is funny! My wife is clearly a D-Star supporter as well. She's
commented that she finds the exchanges more serious and technical and that
it doesn't sound like a CB. And I too like
@yahoogroups.com
Subject: RE: [DSTAR_DIGITAL] Re: Bit Rate?
Don - Initially I agreed with your wife! Things have changed significantly
in the last three years. Largely it depends which reflectors one
monitors...
Thanks.Joe / W8SS / Mesh Engineering / 810-629-5500
AKA: Dr. Joe Mesh, D.M.D., C.A.G.S
...
See us on the web at:
W8SS, W8SSS K8LCD all on QRZ.com and at drsmesh.com
From: dstar_digital@yahoogroups.com [mailto:dstar_digi...@yahoogroups.com]
On Behalf Of John Parkins
Sent: Thursday, September 02, 2010 2:51 AM
To: J. Moen
Subject: Re: [DSTAR_DIGITAL] Re: Bit Rate
Like fishing - it's not necessarily how big the bites are, but how fast they
are biting - a combination of sample size and rate - seems like there is a
rule that sample rate must be twice the highest frequency being digitized -
for me the test would be with or without hearing aids. steve
On Thu,
Hello Jozef,
Read the post. No where did I say I would give up HF in favour of
D-Star, I said it's nice to have the option of either.
When I want to sit in the garden and have a beer and a chat with
someone on the other side of the world D-Star is the way to go. When I
want to work DX then I go
On Sep 2, 2010, at 9:17 AM, Steve Bosshard (NU5D) wrote:
Like fishing - it's not necessarily how big the bites are, but how
fast they are biting - a combination of sample size and rate - seems
like there is a rule that sample rate must be twice the highest
frequency being digitized - for
No where did I imply that you said you would give up HF. :)
Differing aspects of amateur radio have their place. That's what makes
it, in my opinion, the hobby I never grow tired of.
Been pounding brass for almost 47 years now. CW will still be here 47
more years from now.
D-Star will most
On Sep 2, 2010, at 9:17 AM, Steve Bosshard (NU5D) wrote:
Like fishing - it's not necessarily how big the bites are, but how
fast they are biting - a combination of sample size and rate - seems
like there is a rule that sample rate must be twice the highest
frequency being digitized - for
On Sep 2, 2010, at 6:36 AM, Dr. Joeseph Mesh wrote:
Some respond to the challenge of acquiring the “knowledge required”
to accomplish a remarkable feat of great distance and low power on
HF...
Others like it handed to them effortlessly with fidelity
Which side one agrees with is a
On 9/2/2010 3:30 PM, n2gyn wrote:
Well, I thank everyone for their comments and Technical info.
I think because of my trained ear it makes it harder to deal with the
robot sound. It reminds me of effects processing.
One thing that puzzles me is, why some stations sound less robotic
then
of luck, we
learn and grow, but coming back to the wonderful old stuff is fun too.
Jim - K6Jm
- Original Message -
From: Jozef
To: dstar_digital@yahoogroups.com
Sent: Thursday, September 02, 2010 1:44 AM
Subject: Re: [DSTAR_DIGITAL] Re: Bit Rate?
D-Star, to me
If you change the vocoder, doesn't that mean that everyone else will
have to as well, or else you will be off by your lonesome ? But I may
be wrong...steve
n2gyn wrote:
Thank you all for you reply and comments.
--
Ham Radio Spoken Here !!!
EM11ma - South Mountain, Texas
There are likely two possible areas for improvement and one where
improvement is likely impossible.
Some radios seem to have better transmit audio than others. Many people find
the IC-2200 very good while many people find the ID-880 very bad.
Possible the receive audio could also be improved by
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.
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
If the bit rate is faster, is not the signal wider as well? Would we be
sacrificing a narrow band mode to achieve a faster bit rate? Digital TV looks
and sounds great but the signal width is awesome! Those who think SSB can be
improved and achieve a broadcast-quality signal by adding audio
John,
D-STAR has a very specific standard for the on air digital voice
signal. The signal rate must be 4800 bps (to achieve 6.25khz.
bandwidth). Any variance from that rate and you have broken the
standard and would be incompatible with D-STAR. The specification
also requires the use
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
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
On Sep 1, 2010, at 3:19 PM, n2gyn wrote:
It's NOT a microphone issue. It's the small bit processing. I have
been in Pro sound for most of my life. Their is NO WAY to get any
quality at 8bit. This is unexceptionable to me! I rather listen to
all the QRM and QRN in the world with analog.
I
John:
Actually, it's neither.
8 bits is actually sufficient to reproduce fairly low distortion audio,
given a good sample rate, but with limited dynamic range. Since
communication quality audio doesn't require much dynamic range, that's
not a problem. I don't believe the fact that it's an 8
At 08:43 AM 9/2/2010, you 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.
As stated, fidelity is not the point of D-STAR. It's voice/data
communications using
On Sep 1, 2010, at 4:53 PM, Tony Langdon wrote:
As stated, fidelity is not the point of D-STAR. It's voice/data
communications using the minimum feasible bandwidth.
73 de VK3JED / VK3IRL
http://vkradio.com
And for the HF DV experimenter it looks like DVSI now has a chip to do
1200 or
] Re: Bit Rate?
As stated, fidelity is not the point of D-STAR. It's voice/data
communications using the minimum feasible bandwidth.
73 de VK3JED / VK3IRL
http://vkradio.com
At 10:16 AM 9/2/2010, you wrote:
And for the HF DV experimenter it looks like DVSI now has a chip to
do 1200 or 1800 bps (no FEC) AMBE.
Hmm, maybe room for a HF dongle for experimenters. :) Of course, a
pure software vocoder has its advantages, but there's room to try
different approaches.
There is a lot of room in our hobby for many niche interests and points of
view. I became a Ham in the late 1950s and while I started out on AM, I
switched to SSB fairly soon after. I have always liked communications quality
audio for voice communications. When I discovered a whole
32 matches
Mail list logo
