Search found 4745 matches

by mediatechnology
Sun Jul 25, 2021 12:37 pm
Forum: Pro Audio Design
Topic: Super Low Distortion Ultra Pure Audio Oscillators Revisited
Replies: 151
Views: 179689

Re: Super Low Distortion Ultra Pure Audio Oscillators Revisited

Nice work Mike! I would have used a floating attenuator if I didn't have the need for unbalanced outputs. The ground on the one I have should be liftablle however since for balanced loads the net current in the ground is zero. That assumes perfect resistor matching so at the lower steps the error mi...
by mediatechnology
Fri Jul 23, 2021 10:11 am
Forum: Pro Audio Design
Topic: Stereo Width Control For Mastering Using the LR +/-S Method
Replies: 12
Views: 29423

Re: Stereo Width Control For Mastering Using the LR +/-S Method

The first run of Stereo Width Controller boards work perfectly.

Image
Stereo Width Controller PC Board

Should have done this a long time ago...
by mediatechnology
Thu Jul 22, 2021 4:24 pm
Forum: The Peabody Lounge
Topic: The Corona Virus Hoax of 2020
Replies: 417
Views: 170063

Eric Clapton Says He Will Not Play Any Venues Where Fans Are Required to Be Vaccinated

Eric Clapton Says He Will Not Play Any Venues Where Fans Are Required to Be Vaccinated Music icon Eric Clapton has announced that he will not play any concert or venue where fans are required to be vaccinated to attend. Clapton made headlines in May when he announced that he had a terrible reaction...
by mediatechnology
Thu Jul 22, 2021 4:21 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 221
Views: 253949

Re: Phono Transfer System Construction Information

For both 15 and 30 IPS?

I see what I think is a bias trap in the preamp front end.
Does this machine record?

Can you send me some large-format scans by email?
I can assemble them back into a big image.
I'm wondering if we could put the MM at the headstack and then use the EQ on the existing board.
by mediatechnology
Wed Jul 21, 2021 8:44 pm
Forum: Pro Audio Design
Topic: The Studer "90° Filter" Stereo to Mono Summer/Recorrelator
Replies: 9
Views: 3796

Re: The Studer "90° Filter" Stereo to Mono Summer/Recorrelator

I had a chance today to listen to a bunch of different songs folded to mono and I have to conclude that Studer was onto something when they took the Dome filter and used it to improve mono fold-down. I compared the stereo presentation to conventional summed mono and the Studer 90 degree filter. Two ...
by mediatechnology
Wed Jul 21, 2021 3:29 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 221
Views: 253949

Re: Phono Transfer System Construction Information

Based on the termination resistance (56K) I'm wondering if the MM board would be a better option.
by mediatechnology
Wed Jul 21, 2021 3:27 pm
Forum: Pro Audio Design
Topic: Stereo Width Control For Mastering Using the LR +/-S Method
Replies: 12
Views: 29423

Re: Stereo Width Control For Mastering Using the LR +/-S Method

The Stereo Width Controller boards are in - let's see if they run.

Image
by mediatechnology
Wed Jul 21, 2021 3:23 pm
Forum: Pro Audio Design
Topic: The Studer "90° Filter" Stereo to Mono Summer/Recorrelator
Replies: 9
Views: 3796

Re: The Studer "90° Filter" Stereo to Mono Summer/Recorrelator

Thanks for the citations Frank!
Lots of reading to do...
by mediatechnology
Tue Jul 20, 2021 10:11 pm
Forum: Build
Topic: Phono Transfer System Construction Information
Replies: 221
Views: 253949

Re: Phono Transfer System Construction Information

Paul -

I'm not sure I can read the values.
What is the value of the resistor that terminates the head?
Is it 56K?
by mediatechnology
Tue Jul 20, 2021 9:56 pm
Forum: Pro Audio Design
Topic: The Studer "90° Filter" Stereo to Mono Summer/Recorrelator
Replies: 9
Views: 3796

Re: The Studer "90° Filter" Stereo to Mono Summer/Recorrelator

At GroupDIY I found sims: "In phase" response: https://proaudiodesignforum.com/images/jpg/Studer_90_Degree_Filter_Inphase.jpg "Out-of-phase" response. https://proaudiodesignforum.com/images/jpg/Studer_90_Degree_Filter_Outphase.jpg So it appears that the Studer 90 degree filter makes mono, which wou...