Let us not forget clearly pronounced tonearm resonances included with large
clicks on almost every type of tonearm (especially those straight aluminum
tube type).


----- Original Message -----
From: "Jerry Hartke" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, April 11, 2012 1:52 PM
Subject: Re: [ARSCLIST] Recording_78rpm_records


> Some confusion here.
>
> Pops and clicks are usually impulses, neither pure sine nor pure square
> wave. They often appear as a central spike surrounded by lower amplitude
> ringing. Their exact nature depends greatly on the nature of the defect
> and
> the dynamics of the reproducing system.
>
> Digital sampling can capture any waveform, not just sine waves. Accuracy
> depends on the sampling frequency and the resolution (bit depth.) Of
> course,
> complex periodic waveforms can be represented by a series of harmonically
> related sine waves of appropriate amplitude and phase, but that is not the
> fundamental limitation of digital sampling.
>
> Jerry Hartke
>
>> -----Original Message-----
>> From: Association for Recorded Sound Discussion List
>> [mailto:[log in to unmask]] On Behalf Of D. Allen
>> Sent: Wednesday, April 11, 2012 7:04 AM
>> To: [log in to unmask]
>> Subject: Re: [ARSCLIST] Recording_78rpm_records
>>
>> Dale Francis
>>
>> On Apr 11, 2012, at 2:05, "Andrew S. Hamilton" <[log in to unmask]>
>> wrote:
>>
>> > It's that the pops and clicks are near square waves, in terms of their
>> rise times, and digital can only capture sines. So, it changes the
>> attack
>> and harmonics of the surface noise and makes it ugly, whereas the same
>> noises on the vinyl are easy to ignore and might even be exciting>?<
>> Incidentally, he said this is also why digital fails to deliver,
>> musically, even though it does great telephony, since the combined
>> harmonic overtones of a full orchestra during a fortissimo would approach
>> a square wave on an oscilloscope, but the CD can't make that happen.
>> So,
>> for all its accuracy and quietude, its just a stomp box (LPCM).
>> >
>> >
>> > Cheers,
>> > Andrew
>>
>>
>> Can either a phono cartridge or a speaker can accurately encounter a
>> square wave without side issues ... needle leaving groove ... =