Search found 55 matches

by w9ac
Wed May 22, 2019 3:59 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Paul, I got hit with a Windows update today and almost forgot to add this cautionary note: I've had the last few Windows updates stall at restart, with the a black screen and spinning dots forever. Two updates ago I figured out that there is something about the Presonus driver that causes this. If ...
by w9ac
Tue May 21, 2019 12:00 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Bryan W4WMT wrote:Can you tell which one is creeping?

Latency from the Presonus output always remains constant (the lavender trace). But latency from the ANAN headphone jack (yellow trace) increases to the delay shown in the first set of screen captures.

Paul, W9AC
by w9ac
Tue May 21, 2019 12:56 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

My guess would be buffers associated with the stream to the CODEC on the SDR board are slowly filling up, whereas the buffers associated with the ASIO stream are being kept reliably empty. Thanks Scott. Perhaps a future release of Thetis could flush and refresh the CODEC buffer at periodic interval...
by w9ac
Mon May 20, 2019 8:19 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Interesting. The timing disparity between audio at the Studio 192 headphone jack and the 7000DLE's headphone jack "creeps in" with time but corrects itself by disabling, then re-enabling VAC in Thetis. Sometimes it occurs within a few minutes, other times it happens hours later. It also cl...
by w9ac
Mon May 20, 2019 12:02 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Well, I rebooted Thetis and now the ANAN 7000DLE and Studio 192 headphone jacks show nearly the same response time. Not sure what that was all about. Captures below. Top capture is linear phase; bottom is low latency.

Paul, W9AC


SDS00004.jpg
SDS00004.jpg (107.3 KiB) Viewed 1255 times
by w9ac
Sun May 19, 2019 11:51 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Paul, Interesting experiment: Without changing any of your settings from above, remove the 48kHz word clock going to the Presonus and see what that does to your hourly overflow underflow count. 73, Bryan W4WMT Bryan, If I pull the 48 kHz clock cable between the GPSDO and Presonus 192, then the Pres...
by w9ac
Sun May 19, 2019 11:35 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

You save at least 10ms in both TX and RX directions when using a low latency filter of any size compared to a linear phase filter of length 2048. With some time to kill this afternoon, I measured CW latency of the CW side-tone in Thetis' new QSK mode. In the screen captures below, the first set is ...
by w9ac
Sun May 19, 2019 8:19 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

That's fabulous, Paul! And it really demonstrates the big difference that ASIO drivers and hardware can make. Were you also using the low latency filter settings? Yes, although the linear phase setting with a 64/2048 filter size produces similar results with extremely low latency. I do see some ran...
by w9ac
Sun May 19, 2019 6:22 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

w-u-2-o wrote:Paul,

There is no sidetone via VAC. I am curious what you are hearing. Are you using PowerSDR or Thetis? If Thetis, do you have QSK turned on?

73,

Scott

Yes, QSK is engaged in Thetis and VAC is active. So, the CW side-tone comes from the receiver and not the side-tone generator.

Paul, W9AC
by w9ac
Sun May 19, 2019 12:46 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Been operating CW this morning while listening direct from the Studio 192. Latency is so low that I can send CW without any ear-to-hand timing errors. As soon as the key's contacts close, the side tone is right there. Quite amazing. This was simply a test; I normally monitor from a Presonus StudioLi...
by w9ac
Sat May 18, 2019 1:34 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Bryan W4WMT wrote:Paul,

Not if you have already tried force = 1 on the resampler controls.
I assume you did, so that’s about it.

73, Bryan W4WMT

Better with Force engaged with 1/1 selected but I still see a few over/under flows long term. Not sure how serious that is.

Paul, W9AC
by w9ac
Sat May 18, 2019 12:52 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Bryan W4WMT wrote:Hi Paul,
On a well pacified PC your ”Ringbuffer” latency settings should be able to run lower than 10ms. But now we’re splitting hairs :-)

73, Bryan W4WMT

Bryan,

10/10 ms on RingBuffer is as low as I can go without overflow error. Any other tweaks possible?

Paul, W9AC
by w9ac
Fri May 17, 2019 10:53 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Paul, You are on the right track! As Bryan has explained before, the Portaudio settings are meaningless for ASIO and should be set to zero when using ASIO. The next and last order of business is to see how small you can get the buffer latency settings. I have mine set to In 5 and Out 3. Also, I was...
by w9ac
Fri May 17, 2019 7:08 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Bryan, That works and now the Buffer Size moves lock-step between the Studio 192 and Thetis. However, I tried setting all four wheels to zero but got Over/Under counter overflows. Next, I left Port Audio at zero, but put the Ring Buffer on Auto (i.e., boxes unchecked). See below. Var Ratio stays VER...
by w9ac
Fri May 17, 2019 4:01 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Maybe there’s a setting in the Presonus’ ASIO control panel that enables it to accept block size changes from the host application? Failing that, can you manually set the block size in the ASIO control panel? 73, Bryan W4WMT Unfortunately, no. The Presonus control panel has no manual override. Ther...
by w9ac
Fri May 17, 2019 1:34 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

The next step for you would be to check the Force boxes and prove to yourself that the radio and the Presonus are indeed synced (evidenced by the over/underflow counters staying at zero indefinitely). 73, Bryan W4WMT Yes, I can confirm that counters remain at zero when "force" is checked ...
by w9ac
Fri May 17, 2019 10:44 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Bryan, attached below. I am not convinced the Var Ratio should be 1.0 when using a common clock in this case. Because of the large frequency disparity between 10 MHz and 48 kHz, coaxial cable length will affect pulse timing between the two outputs. However, that timing error should remain constant f...
by w9ac
Thu May 16, 2019 11:54 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Scott, That fixed it. Thanks for the link. To answer your question, Var Ratio stays at exacty 1.0 when i use the Windows WDM driver. However, then using ASIO and the the Studio 192 inputs and outputs, Var Ratio hugs very near 1.0 but bounces around a bit at 5th and 6th decimal places. The Bodnar GPS...
by w9ac
Thu May 16, 2019 9:18 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Well, after switching between audio drivers, I now get the error message below. I tried rebooting both the PC and ANAN 7000. No luck. I then removed Thetis from Win10 and tried to re-stall. Still get the fatal audio error message at start-up and Thetis won't load. So, how to clear this fatal error a...
by w9ac
Thu May 16, 2019 2:08 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

w-u-2-o wrote:Is it working well, Paul? Does the resampler Var ratio stay at 1.0?

Well. I still have to make a new BNC jumper for the second output. I'll try it this weekend and report back.

Paul, W9AC
by w9ac
Thu May 16, 2019 3:15 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Received the Bodar dual GPSDO this afternoon. Setup is mostly easy but programming the frequency of the second output requires a trick that's not obvious from the installation instructions. For example, programming 10 MHz and 96 kHz simultaneous outputs isn't initially possible as the programming so...
by w9ac
Sat May 11, 2019 12:11 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Scott,

Now it all makes sense. I didn't realize the Bodnar unit had two independent outputs.

Thanks for the info.

Paul, W9AC
by w9ac
Fri May 10, 2019 1:23 pm
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

The Presonus 192 Mobile audio interface arrived and is now working well with my StudioLive 16R mixer under Presonus' Universal Control software. I've read through the owner's manual but I'm still at a loss concerning how Word Clock can be used with my ANAN 7000DLE and 192 Mobile. Specifically, what ...
by w9ac
Thu May 02, 2019 10:47 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Re: Presonus Studio 192 Mobile

Interesting, I looked through the on-line manual but didn't see the format for the clock input. Is it PPS, 10 MHz, or...?

Paul, W9AC
by w9ac
Thu May 02, 2019 1:34 am
Forum: Microphones, Speakers & Audio Hardware
Topic: Presonus Studio 192 Mobile
Replies: 46
Views: 3181

Presonus Studio 192 Mobile

I'm looking to replace a Behringer UMC2020HD audio interface with a Presonus Studio 192 Mobile unit. Since acquiring a Presonus StudioLive 16R digital rack mixer, I really like the Presonus build quality. For those of you using this device with either PSDR or Thetis VAC, have the Presonus drivers be...
by w9ac
Mon Apr 22, 2019 7:18 pm
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: 8000DLE internal noise - (switcher?)
Replies: 2
Views: 745

Re: 8000DLE internal noise - (switcher?)

Now that Scott was kind enough to move my post into the correct section, I can see that my 8000 is not alone in having this issue. In my case, at least the spikes are outside the amateur bands with the exception of a minor one at 14.031 . (thereabouts, it slides around) However:- the whopper at ~20...
by w9ac
Mon Apr 22, 2019 2:46 am
Forum: Thetis
Topic: Thetis QSK and the new default low-latency filters
Replies: 9
Views: 865

Re: Thetis QSK and the new default low-latency filters

John, What you're describing shows just how good performance is with the new QSK changes. It's oh-so-simple to blank audio for a period of time in order not to deal with it. Apart from Elecraft, that's what every commercial manufacturer does. You're right about the slight ringing. My default CW filt...
by w9ac
Mon Apr 22, 2019 2:20 am
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: Anan 7000DLE Mk-II PA output.
Replies: 8
Views: 1608

Re: Anan 7000DLE Mk-II PA output.

Volker: I suspect this is just a sloppy tolerance issue with the impedance matching filter components for 17 and 10 meters. The distortion is the result of having to over-drive the PA into its non-linear region in order to increase the output. When I get a chance later, I'm going to put a scope on ...
by w9ac
Sun Apr 21, 2019 8:24 pm
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: 7000DLE QSK Modifications
Replies: 6
Views: 638

Re: 7000DLE QSK Modifications

Hi Paul, Have you had it on SSB yet? Have you measured PureSignal two-tone IMD performance from your LDMOS amp when bypassing the 7000 PA? 73, Bryan W4WMT Averaging about -65 dBc with PS engaged and -35 dBc disengaged. That's at 1200W from a 1500W water-cooled eb104.ru amp. I don't run it higher. M...
by w9ac
Sun Apr 21, 2019 2:14 pm
Forum: Everything Else: Antennas, Relays, Switches, Power, Grounding, Cooling, etc.
Topic: Unstable, wide, nasty spur
Replies: 24
Views: 3641

Re: Unstable, wide, nasty spur

For those not seeing the wide spur on 160m with Orion MKII, expand the display a bit to 2100 kHz. Mine occurs at 2020 kHz, outside the 160m band. The root switching fundamental appears to occur at approximately 400 kHz. Switch the band selector to "L/MW." With the antenna disconnected, loo...

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