[Elecraft] CW Pitch Resolution

[Sam Morgan]

http://tonometric.com/adaptivepitch/

On 10/13/2013 9:46 AM, Brian Alsop wrote:
> Hi John,
>
> I read that article too.  Personally I think it is a lot of bunk. It
> assumes perfect hearing.
>
> Where ones sweet spot is depends upon his hearing and hearing
> degradation.  The closest pitch to 432 Hz is 429.97 Hz on my K3.
> Some people's sweet spot may be 700 Hz-- since 432 Hz may be 20 db down
> from there!
>
> There was a link somebody posted a year or so ago.  It could be used
> determined how much pitch difference one can detect.  For most people is
>  >3 Hz.  For piano tuners and musicians with perfect pitch it is likely
> to be less.  You can also try using the K3's fine tuning and tune in a
> carrier.  The increase or decrease the K3's frequency by 3Hz and see if
> you can detect any change.
>
> Thus most won't perceive any difference between 429.97 and 432 Hz.
> If you can, than congratulations on your perfect pitch.
>
> 73 de Brian/K3KO
>
> On 10/13/2013 14:03, John Seney wrote:
>> Hi Folks:
>>
>> The CW pitch resolution in my K3 seems to be 10 Hz per step. A recent
>> article in QST
>> spoke of 432 Hz as being a sweet spot frequency based on musical
>> notes. A quick search
>> on frequencies of real musical notes shows hardly any are at integer
>> values.
>>
>> Note -- Freq -- Wavelength
>>
>> D4    293.66    117.
>> D#4/Eb4    311.13    111.
>> E4    329.63    105.
>> F4    349.23    98.8
>> F#4/Gb4    369.99    93.2
>> G4    392.00    88.0
>> G#4/Ab4    415.30    83.1
>> A4    440.00    78.4
>> A#4/Bb4    466.16    74.0
>> B4    493.88    69.9
>> C5    523.25    65.9
>> C#5/Db5    554.37    62.2
>> D5    587.33    58.7
>> D#5/Eb5    622.25    55.4
>> E5    659.26    52.3
>> F5    698.46    49.4
>> F#5/Gb5    739.99    46.6
>> G5    783.99    44.0
>> G#5/Ab5    830.61    41.5
>> A5    880.00    39.2
>>
>> Could the firmware be changed for experimentation with this or is
>> there an easier
>> way to accomplish it with RIT or filter offsets?
>>
>> 73
>>
>> John - WD1V

-- 

GB & 73
K5OAI
Sam Morgan