[sdiy] Top octave practices in old organs

[cheater00 .]

Ah right, I'm aware of this.

Cheers,
D.

On Wed, May 8, 2013 at 12:04 AM, Tom Wiltshire <tom at electricdruid.net> wrote:
> This is an example:
>
> http://elektrotanya.com/yamaha_electone_b-45.pdf/download.html
>
> Have a look at the way that the different "tones" are created on page 25 - one simple(ish) filter for each tone,derived from all the square waves at a particular footage, rather than one-per-tone (which would be on page 8 - the dividers).
>
> T.
>
> On 7 May 2013, at 19:55, cheater00 . <cheater00 at gmail.com> wrote:
>
>> Hi Tom,
>> what are those filters you speak of? I'm trying to imagine what's
>> going on, but can't quite picture it.
>>
>> Of course organs have tone shaping filters, but I'm not sure how that
>> relates to what you say.
>>
>> Cheers,
>> D.
>>
>> On Tue, May 7, 2013 at 7:44 PM, Tom Wiltshire <tom at electricdruid.net> wrote:
>>> Seconded. It's fairly common practice to miss or repeat the highest or lowest frequencies. Hammond set the ball rolling way back in the 1930's and some (many? Survey results please!) who came after followed the same path.
>>> These days it's regarded as "character", and many digital clonewheels copy the effect.
>>>
>>> A similar short cut is to use one set of filters for all the tones from an octave or even for a whole manual. My Electone used to do this. Notes at the top end of a manual were noticeably quieter and mellower than the ones at the bottom. They sort-of got away with it because it only had 44-key manuals. With full-size keyboards, the effect would have been even more disturbing.
>>>
>>> T.
>>>
>>> On 7 May 2013, at 18:26, cheater00 . <cheater00 at gmail.com> wrote:
>>>
>>>> Hi John,
>>>> I believe that's normal. That's what I've seen in Hammonds and Electones.
>>>>
>>>> Cheers,
>>>> D.
>>>>
>>>> On Tue, May 7, 2013 at 6:06 PM, John Speth <jspeth at avnera.com> wrote:
>>>>> Hi-
>>>>>
>>>>> I just wrapped up the cleaning and restoration of a 1973 Wurlitzer
>>>>> Funmaker Organ.  In trying to determine if it's all working properly, I
>>>>> have some doubt about the upper keyboard top octave.
>>>>>
>>>>> There are three pipe settings: 4', 8', and 16'.  I found that the 4' and
>>>>> 8' pipes are missing from top C.  In the complete C-B flat octave below
>>>>> top C, the 4' pipe is missing.  It's almost as if the it was designed that
>>>>> way but I don't know that for sure.  Is that a common design practice from
>>>>> the era to deal with the lack of very high pipe frequencies?  Or does my
>>>>> organ have a subtle problem that I need to fix?
>>>>>
>>>>> JJS
>>>>> _______________________________________________
>>>>> Synth-diy mailing list
>>>>> Synth-diy at dropmix.xs4all.nl
>>>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>> _______________________________________________
>>>> Synth-diy mailing list
>>>> Synth-diy at dropmix.xs4all.nl
>>>> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>>>
>
> _______________________________________________
> Synth-diy mailing list
> Synth-diy at dropmix.xs4all.nl
> http://dropmix.xs4all.nl/mailman/listinfo/synth-diy