[Elecraft] K3 audio quality

[Joe Subich, W4TV]

 > Consider a baritone against a soprano on the same settings.  I think
 > we need to hear from Jim on how they adjust the mixer settings for
 > each person, news or music....

The way EQ settings are adjusted in a recording studio or FM broadcast
(where one is concerned with 20 Hz to 15 or 20 KHz) has *no bearing* in
*communications* service.  As Jim and others have already pointed out,
Ma Bell learned nearly 90 years ago that 300 Hz to 2700 Hz works just
as well for the baritone (or basso profundo) as the soprano (or even
coloratura).  Even news/talk does minimal vocal equalization leaving
that to the preemphasis/deemphasis built into the transmission system.

When it comes to communications, the fundamental tone of the voice is
not [so] important ... what is important is overtone structure and
that is transmitted better in the 300 - 2700 Hz range than a 100 (or
50) Hz to 2200 Hz range for a baritone/basso profundo as the power
is concentrated in the frequency range critical for intelligibility.

With either the baritone or soprano, the speaking voice has very little
useful *power* above 3 KHz.  In RF systems (and old unequalized phone
circuits), there is more broadband noise than actual voice energy above
3 KHz so a 3 KHz roll-off improves intelligibility and reduces "listing
fatigue".


73,

    ... Joe, W4TV


On 9/16/2016 8:27 PM, Mel Farrer wrote:
> Joe and all,
> Isn't this where the rubber hits the road?  That is while your EQ settings are OK....  It does not address the audio spectrum generated by the speaker.
>
> Consider a baritone against a soprano on the same settings.  I think we need to hear from Jim on how they adjust the mixer settings for each person, news or music....
> Thanks.
>
> Mel, K6KBE
>
>
>       From: "Joe Subich, W4TV" <lists at subich.com>
>  To: elecraft at mailman.qth.net
>  Sent: Friday, September 16, 2016 5:17 PM
>  Subject: Re: [Elecraft] K3 audio quality
>
>
> EQ settings here:
>
> SSB: -16, -16, -6, 0, 0, +3,  +5,  -6
>
> CW:  -16,  -3,  0, 0, 0, -6, -10, -12
>
> SSB setting are designed to roll off low frequency QRM,
> provide some "presence" in the 1200-2800 Hz range essential
> for intelligibility and roll off high frequency hiss, noise
> and QRM.
>
> Those who like "full range" audio (ESSB QRM generators) will
> be appalled at the low frequency cut but it makes a big
> improvement in intelligibility in most conditions.  Audio at
> 100 Hz and below is absolutely not needed for communication.
>
> CW Settings are designed to roll off outside my CW listening
> range.  My "pitch" is 460 Hz so I keep 200 - 800 Hz flat and
> cut above/below a 600-700 Hz passband.  If one is using a
> higher "pitch" it would be worthwhile changing the 1600 Hz
> band from -6 to 0.
>
> 73,
>
>     ... Joe, W4TV
>
> On 9/16/2016 5:14 PM, Rich wrote:
>> Would you be kind enough to post your EQ values?
>>
>> Rich
>>
>> K3RWN
>>
>>
>> On 9/16/2016 15:18 PM, Greg wrote:
>>> When I first got my K3, I was used to a FT1000D and had the SP5
>>> speaker to
>>> go with it.  A friend who also has a FT1000D told me he thought the K3
>>> sounded like "$#@%" compared to the FT1000D...so I hooked the K3 up to
>>> the
>>> second input on the SP5 and switched back and forth between the
>>> FT1000D and
>>> the K3, making equalizer adjustments to the K3 as I did so.  Finally I
>>> felt
>>> I had the K3 sounding like a FT-1000D.  My friend came over and I made
>>> him
>>> turn around so he could not see which radio he was listening to...At that
>>> point when I switched from one radio to the other, he could not tell
>>> which
>>> was which.  Of course he grumbled that you shouldn't have to make
>>> changes to
>>> a new radio to get it to sound good...but I just laughed...  The
>>> beauty of
>>> the K3 is having the ability to do what you want, and adjusting the
>>> sound to
>>> personal taste is only one feature!  73, Greg-N4CC
>>>
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