Author Topic: Will you accept 78 records played by 33 needles?  (Read 486 times)

WSBG Returns

  • Member
  • ***
  • Posts: 120
Will you accept 78 records played by 33 needles?
« on: April 26, 2021, 10:15:04 PM »
 I'm worried. I got a 78 record and used the original needle. What do you think about it? Will you accept flacs for it?

radioman

  • Member
  • **
  • Posts: 24
Re: Will you accept 78 records played by 33 needles?
« Reply #1 on: April 26, 2021, 11:40:07 PM »
is it a vinyl 78 - or shellac?

WSBG Returns

  • Member
  • ***
  • Posts: 120
Re: Will you accept 78 records played by 33 needles?
« Reply #2 on: April 27, 2021, 12:26:59 AM »
I think it's vinyl.

Upgrade

  • Member
  • **
  • Posts: 61
Re: Will you accept 78 records played by 33 needles?
« Reply #3 on: April 27, 2021, 02:19:30 AM »
78s used a wider standard groove needle about 3 mil. Needles meant for vinyl LPs and 45s are microgroove about 1 mil.

Most 78s were shellac though many library music companies issued 78s very late well after the 1960s onto vinyl. These were likely still standard groove though modern vinyl 78s tend to be microgroove since no one has made a standard groove record in a long time.

A needle meant for 33s is about 3 times smaller than a 78’s standard groove and will sink to the bottom and pick up a lot of noise and dirt from the groove floor, so not ideal.

However if you are recording a 78 at 33 rpm and speeding it up in audacity, you need to make sure your turntable is not applying the RIAA equalization at 33 rpm. Speeding it up will distort this equalization curve which gives low treble and a lot of bass.

Ideally you would be using a wider 78 standard groove needle at 78 rpm. If you are using 33 rpm, try to bypass the RIAA equalization from the amplifier and transfer it flat. If you can’t do that, invert the RIAA curve in audacity to remove it, apply it, speed up the recording, and reapply the correct RIAA curve (though depending on how old the 78 is, early ones did not use RIAA and used custom EQ curves).

Lord Thames

  • Member
  • ****
  • Posts: 275
Re: Will you accept 78 records played by 33 needles?
« Reply #4 on: April 28, 2021, 08:06:26 PM »
I will add to Upgrade's excellent post that the 1960s library 78s pressed on vinyl are generally microgroove so can be played with a conventional stylus with no damage.

I've got several shellac library 78s I've not heard yet as I have yet to get the special stylus for them - I'm hoping get one to dub some shellac soon so Upgrade's advice will be very useful!
« Last Edit: April 28, 2021, 08:10:11 PM by Lord Thames »