[78-L] Groove spacing - groove width

[Kristjan Saag]

Thanks, all, for interesting information. Seems the switch to electric 
recording had little effect on groove width.

As for playback EQ curves, here is a link to a website that deals a lot 
with this, including a large table for different record companies.
http://wiki.audacityteam.org/wiki/78rpm_playback_curves#Table_of_EQ_Curves

I'm sure some of you have seen it; I may even have gotten the link from 
this list.
As for reliability of its content I have no clue.
Kristjan

On 2016-11-19 22:58, Royal Pemberton wrote:
> Those very first Stokowski Victors have bass going down to roughly 
> 70-80 Hz due to his using string basses on the recordings. They didn't 
> do that on later recordings most likely because they didn't work out 
> they'd recorded at all, as whatever they auditioned test pressing on 
> cut off at more like 200 Hz. I wonder what people thought the first 
> time they heard one of those first Stokowski acoustics years later on 
> Orthophonic acoustic or electric machines.... On Sat, Nov 19, 2016 at 
> 9:35 PM, Ron L'Herault <lherault at verizon.net.invalid
>> wrote:
>> I suspect that since acoustics didn't have much bass, whatever 
>> improvement that came via Orthophonic playback was considered 
>> phenomenal. Ron L -----Original Message----- From: Ron 
>> [mailto:roscoer at verizon.net] Sent: Saturday, November 19, 2016 10:18 
>> AM To: '78-L Mail List' Cc: MOCAPS-L at yahoogroups.com Subject: RE: 
>> [78-L] Groove spacing - groove width Weren't the first Vitaphone 
>> movie discs issued in 1926? I believe the first Vitaphone movies were 
>> shorts, but that in 1926 "Don Juan" was a silent film issued with a 
>> Vitaphone sound track comprised only of music and sound effects, no 
>> dialogue. Also, if some sort of low frequency attenuation wasn't 
>> used, then the amplitudes of low frequencies would have required 
>> their attenuation to keep the groove spacing down. I believe that 
>> they saw their options in 1925 as either 1. attenuate the bass or 2. 
>> provide a constantly wide groove that would have accommodated the 
>> lowest frequency on the new Orthophonic records [50 Hz]. The constant 
>> wide groove would have required a 12" diameter disc to hold what was 
>> previously held on a 10" acoustic disc. So the attenuation won out. I 
>> personally have been very amazed that no corresponding bass boost on 
>> playback was ever provided in the earliest electrical playback 
>> equipment such as the Victrola 10-51 electrically amplified record 
>> changer. _______________________________________________ 78-L mailing 
>> list 78-L at klickitat.78online.com 
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