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SOS Technical Glossary

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Re: SOS Technical Glossary

PostPosted: Tue Nov 06, 2018 2:25 am
by Eddy Deegan
That's a comprehensive glossary Hugh :)

While browsing it I noted the lack of an entry for Overtone. At first I thought it was just another word for Harmonic but something in the back of my head tickled and I googled it a bit and found a definition of Overtone is defined as any frequency having a larger value than the fundamental frequency of the system. When an overtone is combined with the fundamental frequency, it is known as a partial. A harmonic is such a partial having an integer multiplication of the fundamental.

Overtones featured in my early piano education but I'd lost the definition over the years - basically, they are the mess from which harmonics can be picked. Or something!

(May be too trivial for the glossary but I figured I'd mention it)

Re: SOS Technical Glossary

PostPosted: Tue Nov 06, 2018 11:34 am
by Hugh Robjohns
Thanks Eddy, I'll add that one in. EDIT: Done!

I remember getting horribly confused way back with the different numbers of overtones and harmonics...

H

Re: SOS Technical Glossary

PostPosted: Tue Nov 06, 2018 5:41 pm
by Folderol
Thanks for that Eddy. It greatly clarifies some aspects of my synth of choice - especially as the original designer is not a native English speaker!

Re: SOS Technical Glossary

PostPosted: Thu Nov 22, 2018 5:20 pm
by ef37a
Hugh Robjohns wrote:Thanks Eddy, I'll add that one in. EDIT: Done!

I remember getting horribly confused way back with the different numbers of overtones and harmonics...

H

I dimly remember being told that 2kHz is the FIRST Overtone of 1kHz but the SECOND Harmonic?

Dave.

Re: SOS Technical Glossary

PostPosted: Thu Nov 22, 2018 5:45 pm
by Hugh Robjohns
Quite so! :D

Re: SOS Technical Glossary

PostPosted: Thu Nov 22, 2018 8:11 pm
by wireman
Since I just sent my old cassette tape deck (AIWA AD-F660) away to see if it can be repaired I realise the glossary is missing some tape-related definitions:

  • Wow
  • Flutter
  • Dropout (tape)

Also for the Dolby entry describing noise reduction and surround technologies there was also Dolby HX which I think just optimised the use of bias on recording for high signal levels.

Re: SOS Technical Glossary

PostPosted: Thu Nov 22, 2018 9:07 pm
by Hugh Robjohns
wireman wrote:I realise the glossary is missing some tape-related definitions:

Good call. I'll add those tomorrow.

Also for the Dolby entry describing noise reduction and surround technologies there was also Dolby HX which I think just optimised the use of bias on recording for high signal levels.

Yes, as I recall, it reduced the bias level when there was strong HF content in the audio signal to avoid unnecessary overbiasing. I'll check the detail and add it to the glossary. Thanks.

H

Re: SOS Technical Glossary

PostPosted: Fri Nov 23, 2018 12:37 pm
by Hugh Robjohns
All added -- thanks for the suggestions. Keep them coming!

H