Re: [ARSCLIST] Technics SP-15 to computer nightmare

[Robert Cham <cham@xxxxxxxx>]

FWIW.  This may not relate to anything going on here.  Direct drive 
turntables all have, sometimes substantial,rumble.  The difference 
from a rim drive turntable is that the direct drive turntables, such 
as the SP 15 rumble at such a low frequency as to be inaudible.  I do 
know of situations where they used up all the headroom in direct 
coupled amplifier, with just the rumble.  I believe the Thorens is a 
belt drive table.  That's what made me think of this

Not knowing your equipment, I don't really know if something like 
this could be going on here.  As I said, FWIW.

Bob Cham

> Hi,
>
> Although my problem with the transfer of 78s are nearly over, it would seem
> I am not quite out of the woods yet and I would really appreciate any
> explanations or suggestions on why it is that all tracks on CDs, other than
> those produced from the Technics SP-15 are playing OK on a laptop. I am now
> in a situation where the Technics tracks are playing perfectly everywhere,
> including the desktop computer. However, a CD made of assorted tracks
> produced by other sources, including vinyl on a Thorens, played on the
> laptop plays fine other than when it comes to the Technics tracks.
> Evidently, it is the only piece of equipment left which is not happy with
> these recordings and distorts when playing them.
>
> Like Malcolm, I record these tracks in stereo, something that has not given
> any problems in the past on any machine. Volumes are set O.K., no clipping.
> Before recording, checks are made with all equipment involved and there are
> no hints, either visibly on meters or audibly through headphones, that there
> are any extraneous noises such as hums or crackles. No distortion can now be
> detected at any stage during previews before transferring.
>
> For me, the most puzzling thing is that recording singles from the 50s on
> the Thorens proves to be fine when played back on the laptop, substituting
> the Thorens with the SP-15 to record 78s from the 50s (not that date really
> matters) produces distortion on the laptop. The laptop, by the way, is a
> DELL
>
> I appreciate a comment made earlier from the group that I shouldn't worry
> too much about one piece of equipment being happy with this but this part of
> a mastering process for commercial production and all common possibilities
> of machines (and a lot of people listen to CDs in their laptops) that would
> be used to play this on must pass the test.
>
> Any explanations or suggestions greatly received.
>
> Gary.