Search found 5449 matches

by mediatechnology
Wed Apr 08, 2009 6:01 pm
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 620210

Re: Mid Side M-S Matrix Uses No Precision Resistors

Thanks Miko!

Got it built. Now for some electrical tests...

Image
by mediatechnology
Wed Apr 08, 2009 10:42 am
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 620210

Re: Mid Side M-S Matrix Uses No Precision Resistors

Thanks for joining us Brock! I just got the test run with silkscreen and solder mask. Great work Roger! https://www.ka-electronics.com/Images/jpg/MS162_Photo.JPG We rotated the insert connectors 90 degrees. I've dry-fitted the Phoenix connectors to check the mechanicals. After I've built this one we...
by mediatechnology
Tue Apr 07, 2009 10:17 am
Forum: The Peabody Lounge
Topic: Best cities for dining?
Replies: 20
Views: 37660

Re: Best cities for dining?

Cedar Hill Texas.

The Ranch Steakhouse finally got their website happening. This place is awesome. In fact, we ate there just last night.

http://www.ranchsteakhouse.net/index.html
by mediatechnology
Mon Apr 06, 2009 5:53 pm
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 70353

Re: NR compander (P-522)

John - I think I have a copy of the scan you sent that I could turn into a pdf for the TS-1.

I also want to re-size your NR image. It may take me a couple of days 'cause there's some stuff goin' on here.

Are you familiar with the NTI line? http://www.nti-audio.com/
by mediatechnology
Mon Apr 06, 2009 3:59 pm
Forum: Pro Audio Design
Topic: NE570-based NR compander (P-522) by JR
Replies: 34
Views: 70353

Re: NR compander (P-522)

Very nice John! I printed out the schematic so I could follow it along with your text. Elegantly simple. I like what you did in the detector and yes the 570 and the rms seem to be similar in being able to use this trick. The diode limiter for overshoot protection with it's soft-limiting would seem t...
by mediatechnology
Thu Apr 02, 2009 5:32 pm
Forum: Pro Audio Design
Topic: OTB Mixer Using Current Summation
Replies: 137
Views: 214269

Re: OTB Mixer Using Current Summation

I just found the PAR article "Digital vs. Analog Summing" I promised earlier. I couldn't find it anywhere on their website so here's the scan. It makes a nice case for OTB.

http://www.ka-electronics.com/Images/pd ... y_2007.pdf
by mediatechnology
Thu Apr 02, 2009 7:16 am
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 620210

Re: Mid Side M-S Matrix Uses No Precision Resistors

I did crosstalk measurements on MS155. The input was 0 dBu. Left channel 1 kHz, right channel 10 kHz. The 1 kHz crosstalk from L into R is displayed in red. The 10 kHz crosstalk from R into L is in green. This is the precision bypass/monitoring mode. *Points C to F here: http://www.picocompressorfor...
by mediatechnology
Wed Apr 01, 2009 5:57 pm
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 620210

Re: Mid Side M-S Matrix Uses No Precision Resistors

I just finished the new prototype, MS155. This layout has a 5532-based 6dB attenuator on the decoder to compensate for the 2L and 2R de-matrix terms. Thanks to Roger's layout skills it passes signal perfectly. Note that the four added precision resistors are not actually in the matrix - the are in t...
by mediatechnology
Mon Mar 30, 2009 10:00 am
Forum: Pro Audio Design
Topic: Mid Side M-S Matrix Uses No Precision Resistors
Replies: 271
Views: 620210

Re: Mid Side M-S Matrix Uses No Precision Resistors

Thanks Paul. Let me ask you something... In the latest spin of this we've added the -6 dB stage in the decoder's output. They are in the L and R domain and compensate for inherent gain build-up produced by the algebraic 2L and 2R decode terms. The MS-155 board is overall unity gain from encoder inpu...
by mediatechnology
Sun Mar 29, 2009 8:39 am
Forum: Pro Audio Design
Topic: A Discussion About True Power Summing for Stereo Compressors
Replies: 65
Views: 133020

Re: A Discussion About True Power Summing for Stereo Compressors

Here's an application note "The Mathematics of Log-Based Dynamics Processors" that may be useful to our readers. It only touches upon the time constant differences between feed-back and feed-forward and deals primarily with steady-state threshold and ratio. http://www.thatcorp.com/datashts...